заведующий лабораторией, к.ф.-м.н.
Основное место работы: лаборатория Водородных энергетических технологий (№13), Федеральное государственное бюджетное учреждение науки Объединенный институт высоких температур РАН (ОИВТ РАН).
По совместительству: доцент, кафедра Общей физики и ядерного синтеза, НИУ «МЭИ».
E-mail: ddo@mail.ru (личный), h2lab@mail.ru (лаборатория)
Образование: Московский энергетический институт (технический университет), 1997 г., инженер-теплофизик по специальности «теплофизика».
Ученая степень: кандидат физико-математических наук, 2004, специальность 01.04.14 – теплофизика и теоретическая теплотехника.
Опыт работы: 1997-2000: аспирантура ОИВТ РАН, 1994 – настоящее время: ОИВТ РАН; 2012 – настоящее время: НИУ «МЭИ» (совместитель).
Награды и премии: Государственная премия Российской федерации 2003 года для молодых учёных за выдающиеся работы в области науки и техники, Победитель I Общероссийского конкурса молодежных исследовательских проектов в области энергетики «Энергии Молодости-2004» фонда премии «Глобальная энергия».
Общественные организации: Член консультативного совета при Совете директоров Международной ассоциации по водородной энергетике (Advisory Board of Directors of the International Association for Hydrogen Energy).
Публикации и патенты: более 60.
Области экспертизы:
- Приоритеты научно-технологического развития: Переход к экологически чистой и ресурсосберегающей энергетике, повышение эффективности добычи и глубокой переработки углеводородного сырья, формирование новых источников, способов транспортировки и хранения энергии.
- Приоритетные направления модернизации российской экономики: Энергоэффективность и энергосбережение, в том числе вопросы разработки новых видов топлива
Ключевые слова: водород, хранение водорода, металлогидриды, очистка водорода, биоводород, энергоустановки на базе топливных элементов, возобновляемые источники энергии, фазовые превращения, тепломассоперенос, интенсификация тепломассопереноса, молекулярная динамика.
Публикации
2022
Kamshybayeva, G. K.; Kossalbayev, B. D.; Sadvakasova, A. K.; Zayadan, B. K.; Bozieva, A. M.; Dunikov, D.; Alwasel, S.; Allakhverdiev, S. I.
Strategies and economic feasibilities in cyanobacterial hydrogen production Journal Article
In: International Journal of Hydrogen Energy, 2022, (cited By 0).
@article{Kamshybayeva2022,
title = {Strategies and economic feasibilities in cyanobacterial hydrogen production},
author = {G. K. Kamshybayeva and B. D. Kossalbayev and A. K. Sadvakasova and B. K. Zayadan and A. M. Bozieva and D. Dunikov and S. Alwasel and S. I. Allakhverdiev},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85134838101&doi=10.1016%2fj.ijhydene.2022.06.277&partnerID=40&md5=a6a5083b5b6f7491fabc0f1d73588370},
doi = {10.1016/j.ijhydene.2022.06.277},
year = {2022},
date = {2022-01-01},
journal = {International Journal of Hydrogen Energy},
abstract = {Due to the side effects of greenhouse gases, interest in alternative energy sources is growing, and research into hydrogen (Н2) production from cyanobacteria has become a promising direction for the industry. The article provides an overview of cyanobacterial hydrogen production strategies and their current economic efficiency. It also describes metabolic, genetic and technical methods for obtaining H2 from cyanobacteria. Cyanobacteria are considered potential producers of hydrogen energy that will be economically viable shortly, as they only need cheap salts, water and solar energy to grow. However, producing hydrogen from cyanobacteria still requires extensive work, and the main problem is the small amount of hydrogen energy obtained. To produce large amounts of cyanobacterial hydrogen, the most active wild-type strains must be selected and technological, modular and genetic research must be carried out simultaneously. The low energy efficiency of hydrogen from cyanobacteria also shows the need for comprehensive research through international programs. © 2022 Hydrogen Energy Publications LLC},
note = {cited By 0},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Due to the side effects of greenhouse gases, interest in alternative energy sources is growing, and research into hydrogen (Н2) production from cyanobacteria has become a promising direction for the industry. The article provides an overview of cyanobacterial hydrogen production strategies and their current economic efficiency. It also describes metabolic, genetic and technical methods for obtaining H2 from cyanobacteria. Cyanobacteria are considered potential producers of hydrogen energy that will be economically viable shortly, as they only need cheap salts, water and solar energy to grow. However, producing hydrogen from cyanobacteria still requires extensive work, and the main problem is the small amount of hydrogen energy obtained. To produce large amounts of cyanobacterial hydrogen, the most active wild-type strains must be selected and technological, modular and genetic research must be carried out simultaneously. The low energy efficiency of hydrogen from cyanobacteria also shows the need for comprehensive research through international programs. © 2022 Hydrogen Energy Publications LLC
2021
Dunikov, D. O.; Borzenko, V. I.; Blinov, D. V.; Kazakov, A. N.; Romanov, I. A.; Leontiev, A. I.
Heat and mass transfer in a metal hydride reactor: Combining experiments and mathematical modelling Conference
vol. 2057, no. 1, 2021, (cited By 0).
@conference{Dunikov2021,
title = {Heat and mass transfer in a metal hydride reactor: Combining experiments and mathematical modelling},
author = {D. O. Dunikov and V. I. Borzenko and D. V. Blinov and A. N. Kazakov and I. A. Romanov and A. I. Leontiev},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85119610101&doi=10.1088%2f1742-6596%2f2057%2f1%2f012122&partnerID=40&md5=70d88d8f2d9960a523bcc76b05dc7251},
doi = {10.1088/1742-6596/2057/1/012122},
year = {2021},
date = {2021-01-01},
journal = {Journal of Physics: Conference Series},
volume = {2057},
number = {1},
abstract = {Heat transfer in porous metal hydride (MH) beds determines efficiency of MH devices. We present a COMSOL Multiphysics numerical model and experimental investigation of heat and mass transfer in a MH reactor filled with 4.69 kg of AB5 type alloy (Mm0.8La0.2Ni4.1Fe0.8Al0.1). To achieve an agreement between the model and experiments it is necessary to include a flow control device (inlet valve or flow regulator) into the model. We propose a simplified and easy-to-calculate boundary condition based on a porous domain with variable permeability at reactor inlet. The permeability of the domain is connected with hydrogen mass flow by a PID controller. Thus, boundary conditions for the inlet pressure and mass flow are coupled and heat transfer inside the reactor could be calculated without additional assumptions applied to heat and mass transfer in the MH bed. © 2021 Institute of Physics Publishing. All rights reserved.},
note = {cited By 0},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Heat transfer in porous metal hydride (MH) beds determines efficiency of MH devices. We present a COMSOL Multiphysics numerical model and experimental investigation of heat and mass transfer in a MH reactor filled with 4.69 kg of AB5 type alloy (Mm0.8La0.2Ni4.1Fe0.8Al0.1). To achieve an agreement between the model and experiments it is necessary to include a flow control device (inlet valve or flow regulator) into the model. We propose a simplified and easy-to-calculate boundary condition based on a porous domain with variable permeability at reactor inlet. The permeability of the domain is connected with hydrogen mass flow by a PID controller. Thus, boundary conditions for the inlet pressure and mass flow are coupled and heat transfer inside the reactor could be calculated without additional assumptions applied to heat and mass transfer in the MH bed. © 2021 Institute of Physics Publishing. All rights reserved.
2020
Dunikov, D.; Blinov, D.
Extraction of hydrogen from a lean mixture with methane by metal hydride Journal Article
In: International Journal of Hydrogen Energy, vol. 45, no. 16, pp. 9914-9926, 2020, (cited By 10).
@article{Dunikov20209914,
title = {Extraction of hydrogen from a lean mixture with methane by metal hydride},
author = {D. Dunikov and D. Blinov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85079518976&doi=10.1016%2fj.ijhydene.2020.01.201&partnerID=40&md5=70b701e44620190580dd10c80a60c21d},
doi = {10.1016/j.ijhydene.2020.01.201},
year = {2020},
date = {2020-01-01},
journal = {International Journal of Hydrogen Energy},
volume = {45},
number = {16},
pages = {9914-9926},
abstract = {Hydrogen/methane mixtures draw attention due to the idea of the injection of hydrogen into natural gas networks and biological production of biohythane by one- and two-step anaerobic fermentation/digestion methods. It is hard to extract hydrogen from dilute mixtures with methane by traditional separation processes, since hydrogen is the minor component with low partial pressure. Metal hydrides selectively absorb hydrogen and offer an opportunity to overcome the limitations of traditional separation methods. In the present paper, we present experimental results on the separation of a dilute mixture of hydrogen (10%) with methane in a flow-through metal hydride reactor with inlet mixture pressure of 0.95 MPa by the LaNi4.8Mn0.3Fe0.1 intermetallic compound. Hydrogen was separated in one step with roundtrip (absorption/desorption) recovery of 74%. An exergetic analysis of the metal hydride separation of a binary mixture containing hydrogen was implemented and equations for hydrogen recovery and exergy efficiency of separation are obtained. Thermodynamic analysis shows that the exergy efficiency of the metal hydride purification has a clear maximum at hydrogen concentrations around 5–20%. The advantage of metal hydride purification is the absorption of the minor fraction from the feed, thus it is preferable for dilute mixtures and could be feasible for practical applications. With the use of low potential or waste heat to drive the reaction, it is possible to increase the efficiency of hydrogen purification by metal hydrides. The maximum exergy efficiency is 61% for 0.8 MPa outlet pressure, taking into account the quality of involved heat flows. © 2020 Hydrogen Energy Publications LLC},
note = {cited By 10},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Hydrogen/methane mixtures draw attention due to the idea of the injection of hydrogen into natural gas networks and biological production of biohythane by one- and two-step anaerobic fermentation/digestion methods. It is hard to extract hydrogen from dilute mixtures with methane by traditional separation processes, since hydrogen is the minor component with low partial pressure. Metal hydrides selectively absorb hydrogen and offer an opportunity to overcome the limitations of traditional separation methods. In the present paper, we present experimental results on the separation of a dilute mixture of hydrogen (10%) with methane in a flow-through metal hydride reactor with inlet mixture pressure of 0.95 MPa by the LaNi4.8Mn0.3Fe0.1 intermetallic compound. Hydrogen was separated in one step with roundtrip (absorption/desorption) recovery of 74%. An exergetic analysis of the metal hydride separation of a binary mixture containing hydrogen was implemented and equations for hydrogen recovery and exergy efficiency of separation are obtained. Thermodynamic analysis shows that the exergy efficiency of the metal hydride purification has a clear maximum at hydrogen concentrations around 5–20%. The advantage of metal hydride purification is the absorption of the minor fraction from the feed, thus it is preferable for dilute mixtures and could be feasible for practical applications. With the use of low potential or waste heat to drive the reaction, it is possible to increase the efficiency of hydrogen purification by metal hydrides. The maximum exergy efficiency is 61% for 0.8 MPa outlet pressure, taking into account the quality of involved heat flows. © 2020 Hydrogen Energy Publications LLC
Blinov, D. V.; Borzenko, V. I.; Bezdudny, A. V.; Dunikov, D. O.; Kazakov, A. N.; Romanov, I. A.; Kuleshov, V. N.; Porembsky, V. I.
vol. 1683, no. 5, 2020, (cited By 0).
@conference{Blinov2020b,
title = {Metal-hydride reactor for low rate fuel supply with pressure driven adsorption and cooled by natural convection},
author = {D. V. Blinov and V. I. Borzenko and A. V. Bezdudny and D. O. Dunikov and A. N. Kazakov and I. A. Romanov and V. N. Kuleshov and V. I. Porembsky},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85099562634&doi=10.1088%2f1742-6596%2f1683%2f5%2f052009&partnerID=40&md5=004799151502f035a94709a7a5cea4a2},
doi = {10.1088/1742-6596/1683/5/052009},
year = {2020},
date = {2020-01-01},
journal = {Journal of Physics: Conference Series},
volume = {1683},
number = {5},
abstract = {A metal hydride reactor for hydrogen accumulation RHA-1 containing 18 kg of La0.85Ce0.15Ni5alloy is created. RHA-1 and has maximum hydrogen capacity of 2.7 st.m3and nominal capacity of 2 st.m3. Experiments have shown that the reactor could be operated using the pressure difference between an electrolyzer (1 MPa) and a fuel cell (>0.2 MPa) with passive cooling/heating of air in indoor conditions. The equilibrium charge rate is 1 st.L/min, the equilibrium discharge rate is 1.3 st.L. The RHA-1 could be used for long term energy storage and in combination with the 100 W PEM fuel cell is comparable with 12V 210Ah electrochemical batteries. The metal hydride/fuel cell system is lighter and more durable than lead acid batteries and cheaper that Li-ion batteries. © 2020 Institute of Physics Publishing. All rights reserved.},
note = {cited By 0},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
A metal hydride reactor for hydrogen accumulation RHA-1 containing 18 kg of La0.85Ce0.15Ni5alloy is created. RHA-1 and has maximum hydrogen capacity of 2.7 st.m3and nominal capacity of 2 st.m3. Experiments have shown that the reactor could be operated using the pressure difference between an electrolyzer (1 MPa) and a fuel cell (>0.2 MPa) with passive cooling/heating of air in indoor conditions. The equilibrium charge rate is 1 st.L/min, the equilibrium discharge rate is 1.3 st.L. The RHA-1 could be used for long term energy storage and in combination with the 100 W PEM fuel cell is comparable with 12V 210Ah electrochemical batteries. The metal hydride/fuel cell system is lighter and more durable than lead acid batteries and cheaper that Li-ion batteries. © 2020 Institute of Physics Publishing. All rights reserved.
Dunikov, D. O.; Borzenko, V. I.; Blinov, D. V.; Volodin, A. A.; Kazakov, A. N.; Romanov, I. A.; Bodikov, V. Y.
Investigation of La0.8Ce0.2Ni4Co0.4Mn0.3Al0.3for possible use as a metal hydride fuel cell anode Conference
vol. 1675, no. 1, 2020, (cited By 0).
@conference{Dunikov2020c,
title = {Investigation of La0.8Ce0.2Ni4Co0.4Mn0.3Al0.3for possible use as a metal hydride fuel cell anode},
author = {D. O. Dunikov and V. I. Borzenko and D. V. Blinov and A. A. Volodin and A. N. Kazakov and I. A. Romanov and V. Y. Bodikov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85098115658&doi=10.1088%2f1742-6596%2f1675%2f1%2f012110&partnerID=40&md5=01cf9e500b6f730bffa7bc20f1a6378b},
doi = {10.1088/1742-6596/1675/1/012110},
year = {2020},
date = {2020-01-01},
journal = {Journal of Physics: Conference Series},
volume = {1675},
number = {1},
abstract = {The low-Co AB5-type La0.8Ce0.2Ni4Co0.4Mn0.3Al0.3 alloy was investigated as a potential material for a metal hydride fuel cell anode. The intermetallic compound was prepared by arc melting in argon atmosphere followed by annealing at 1223 K and hardening in cold water. According to XRD analysis, the alloy has the hexagonal CaCu5 type structure without inclusions of secondary impurities. Electrodes were prepared by cold pressing of alloy powder (20%) with carbonyl nickel (80%). Activation at 100 mA/g was almost done in 3 charge/discharge cycles. Full capacity was 340 mAh/g at current density 300 mA/g. The metal hydride electrodes demonstrate stable high rate dischargeability dropping to 317 mAh/g (-7%) at 1000 mA/g. The electrodes have shown high values of the hydrogen diffusion coefficient, with a maximum of 9 10-11 cm2/s at 10% SOC. © Published under licence by IOP Publishing Ltd.},
note = {cited By 0},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
The low-Co AB5-type La0.8Ce0.2Ni4Co0.4Mn0.3Al0.3 alloy was investigated as a potential material for a metal hydride fuel cell anode. The intermetallic compound was prepared by arc melting in argon atmosphere followed by annealing at 1223 K and hardening in cold water. According to XRD analysis, the alloy has the hexagonal CaCu5 type structure without inclusions of secondary impurities. Electrodes were prepared by cold pressing of alloy powder (20%) with carbonyl nickel (80%). Activation at 100 mA/g was almost done in 3 charge/discharge cycles. Full capacity was 340 mAh/g at current density 300 mA/g. The metal hydride electrodes demonstrate stable high rate dischargeability dropping to 317 mAh/g (-7%) at 1000 mA/g. The electrodes have shown high values of the hydrogen diffusion coefficient, with a maximum of 9 10-11 cm2/s at 10% SOC. © Published under licence by IOP Publishing Ltd.
Blinov, D. V.; Borzenko, V. I.; Bezdudny, A. V.; Dunikov, D. O.; Kazakov, A. N.; Romanov, I. A.; Kuleshov, V. N.; Porembsky, V. I.
vol. 1683, no. 5, 2020, (cited By 0).
@conference{Blinov2020,
title = {Metal-hydride reactor for low rate fuel supply with pressure driven adsorption and cooled by natural convection},
author = {D. V. Blinov and V. I. Borzenko and A. V. Bezdudny and D. O. Dunikov and A. N. Kazakov and I. A. Romanov and V. N. Kuleshov and V. I. Porembsky},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85099562634&doi=10.1088%2f1742-6596%2f1683%2f5%2f052009&partnerID=40&md5=004799151502f035a94709a7a5cea4a2},
doi = {10.1088/1742-6596/1683/5/052009},
year = {2020},
date = {2020-01-01},
journal = {Journal of Physics: Conference Series},
volume = {1683},
number = {5},
abstract = {A metal hydride reactor for hydrogen accumulation RHA-1 containing 18 kg of La0.85Ce0.15Ni5alloy is created. RHA-1 and has maximum hydrogen capacity of 2.7 st.m3and nominal capacity of 2 st.m3. Experiments have shown that the reactor could be operated using the pressure difference between an electrolyzer (1 MPa) and a fuel cell (>0.2 MPa) with passive cooling/heating of air in indoor conditions. The equilibrium charge rate is 1 st.L/min, the equilibrium discharge rate is 1.3 st.L. The RHA-1 could be used for long term energy storage and in combination with the 100 W PEM fuel cell is comparable with 12V 210Ah electrochemical batteries. The metal hydride/fuel cell system is lighter and more durable than lead acid batteries and cheaper that Li-ion batteries. © 2020 Institute of Physics Publishing. All rights reserved.},
note = {cited By 0},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
A metal hydride reactor for hydrogen accumulation RHA-1 containing 18 kg of La0.85Ce0.15Ni5alloy is created. RHA-1 and has maximum hydrogen capacity of 2.7 st.m3and nominal capacity of 2 st.m3. Experiments have shown that the reactor could be operated using the pressure difference between an electrolyzer (1 MPa) and a fuel cell (>0.2 MPa) with passive cooling/heating of air in indoor conditions. The equilibrium charge rate is 1 st.L/min, the equilibrium discharge rate is 1.3 st.L. The RHA-1 could be used for long term energy storage and in combination with the 100 W PEM fuel cell is comparable with 12V 210Ah electrochemical batteries. The metal hydride/fuel cell system is lighter and more durable than lead acid batteries and cheaper that Li-ion batteries. © 2020 Institute of Physics Publishing. All rights reserved.
Dunikov, D. O.; Borzenko, V. I.; Blinov, D. V.; Volodin, A. A.; Kazakov, A. N.; Romanov, I. A.; Bodikov, V. Y.
Investigation of La0.8Ce0.2Ni4Co0.4Mn0.3Al0.3for possible use as a metal hydride fuel cell anode Conference
vol. 1675, no. 1, 2020, (cited By 0).
@conference{Dunikov2020,
title = {Investigation of La0.8Ce0.2Ni4Co0.4Mn0.3Al0.3for possible use as a metal hydride fuel cell anode},
author = {D. O. Dunikov and V. I. Borzenko and D. V. Blinov and A. A. Volodin and A. N. Kazakov and I. A. Romanov and V. Y. Bodikov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85098115658&doi=10.1088%2f1742-6596%2f1675%2f1%2f012110&partnerID=40&md5=01cf9e500b6f730bffa7bc20f1a6378b},
doi = {10.1088/1742-6596/1675/1/012110},
year = {2020},
date = {2020-01-01},
journal = {Journal of Physics: Conference Series},
volume = {1675},
number = {1},
abstract = {The low-Co AB5-type La0.8Ce0.2Ni4Co0.4Mn0.3Al0.3 alloy was investigated as a potential material for a metal hydride fuel cell anode. The intermetallic compound was prepared by arc melting in argon atmosphere followed by annealing at 1223 K and hardening in cold water. According to XRD analysis, the alloy has the hexagonal CaCu5 type structure without inclusions of secondary impurities. Electrodes were prepared by cold pressing of alloy powder (20%) with carbonyl nickel (80%). Activation at 100 mA/g was almost done in 3 charge/discharge cycles. Full capacity was 340 mAh/g at current density 300 mA/g. The metal hydride electrodes demonstrate stable high rate dischargeability dropping to 317 mAh/g (-7%) at 1000 mA/g. The electrodes have shown high values of the hydrogen diffusion coefficient, with a maximum of 9 10-11 cm2/s at 10% SOC. © Published under licence by IOP Publishing Ltd.},
note = {cited By 0},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
The low-Co AB5-type La0.8Ce0.2Ni4Co0.4Mn0.3Al0.3 alloy was investigated as a potential material for a metal hydride fuel cell anode. The intermetallic compound was prepared by arc melting in argon atmosphere followed by annealing at 1223 K and hardening in cold water. According to XRD analysis, the alloy has the hexagonal CaCu5 type structure without inclusions of secondary impurities. Electrodes were prepared by cold pressing of alloy powder (20%) with carbonyl nickel (80%). Activation at 100 mA/g was almost done in 3 charge/discharge cycles. Full capacity was 340 mAh/g at current density 300 mA/g. The metal hydride electrodes demonstrate stable high rate dischargeability dropping to 317 mAh/g (-7%) at 1000 mA/g. The electrodes have shown high values of the hydrogen diffusion coefficient, with a maximum of 9 10-11 cm2/s at 10% SOC. © Published under licence by IOP Publishing Ltd.
Schastlivtsev, A. I.; Dunikov, D. O.; Borzenko, V. I.; Shmatov, D. P.
Hydrogen-Oxygen Installations for the Energy Industry Journal Article
In: High Temperature, vol. 58, no. 5, pp. 733-743, 2020, (cited By 1).
@article{Schastlivtsev2020733,
title = {Hydrogen-Oxygen Installations for the Energy Industry},
author = {A. I. Schastlivtsev and D. O. Dunikov and V. I. Borzenko and D. P. Shmatov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85097996635&doi=10.1134%2fS0018151X20050077&partnerID=40&md5=3a09f6254d4affd427b1543d9df84f59},
doi = {10.1134/S0018151X20050077},
year = {2020},
date = {2020-01-01},
journal = {High Temperature},
volume = {58},
number = {5},
pages = {733-743},
abstract = {Abstract: The review analyzes the main types and designs of hydrogen-oxygen facilities: steam generators, superheaters, and various power air heaters. The main problems arising in the development, creation, and testing of such installations are identified. They include the cooling of the most heat-stressed units, the mixing and carburetion of the main fuel and oxidizer components, the mixing of high-temperature combustion products and ballasting components, and problems associated with the completeness of hydrogen combustion and operational safety. The main areas of these facilities application in the stationary and the energy industry are considered: maneuverability and increased efficiency in power facilities with the steam turbines, energy-storage systems with the renewable energy sources for autonomous power supply, etc. © 2020, Pleiades Publishing, Ltd.},
note = {cited By 1},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Abstract: The review analyzes the main types and designs of hydrogen-oxygen facilities: steam generators, superheaters, and various power air heaters. The main problems arising in the development, creation, and testing of such installations are identified. They include the cooling of the most heat-stressed units, the mixing and carburetion of the main fuel and oxidizer components, the mixing of high-temperature combustion products and ballasting components, and problems associated with the completeness of hydrogen combustion and operational safety. The main areas of these facilities application in the stationary and the energy industry are considered: maneuverability and increased efficiency in power facilities with the steam turbines, energy-storage systems with the renewable energy sources for autonomous power supply, etc. © 2020, Pleiades Publishing, Ltd.
ru D.O. Dunikov, Ddo@mail.; Borzenko, V. I.; Blinov, D. V.
Heat and mass transfer crisis in a metal hydride reactor Conference
vol. 1675, no. 1, 2020, (cited By 0).
@conference{Dunikov2020b,
title = {Heat and mass transfer crisis in a metal hydride reactor},
author = {Ddo@mail. ru D.O. Dunikov and V. I. Borzenko and D. V. Blinov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85098167691&doi=10.1088%2f1742-6596%2f1675%2f1%2f012115&partnerID=40&md5=c7bdc27947a430b152e5df59e2e3ff77},
doi = {10.1088/1742-6596/1675/1/012115},
year = {2020},
date = {2020-01-01},
journal = {Journal of Physics: Conference Series},
volume = {1675},
number = {1},
abstract = {We present a simple lumped mathematical model of hydrogen absorption in a metal hydride reactor with a constant flow rate (sub-critical regime) and use it to predict a heat and mass transfer crisis in the reactor. To verify the model we compare calculations with the experiment on hydrogen absorption in the reactor filled with 5 kg of LaNi4.8Mn0.3Fe0.1 alloy with a hydrogen flow rate of 60 stL/min. The analytical model predicts the heat and mass transfer crisis with good precision. © Published under licence by IOP Publishing Ltd.},
note = {cited By 0},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
We present a simple lumped mathematical model of hydrogen absorption in a metal hydride reactor with a constant flow rate (sub-critical regime) and use it to predict a heat and mass transfer crisis in the reactor. To verify the model we compare calculations with the experiment on hydrogen absorption in the reactor filled with 5 kg of LaNi4.8Mn0.3Fe0.1 alloy with a hydrogen flow rate of 60 stL/min. The analytical model predicts the heat and mass transfer crisis with good precision. © Published under licence by IOP Publishing Ltd.
2019
Kazakov, A.; Blinov, D.; Romanov, I.; Dunikov, D.; Borzenko, V.
Metal hydride technologies for renewable energy Conference
vol. 114, 2019, (cited By 5).
@conference{Kazakov2019,
title = {Metal hydride technologies for renewable energy},
author = {A. Kazakov and D. Blinov and I. Romanov and D. Dunikov and V. Borzenko},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85072568300&doi=10.1051%2fe3sconf%2f201911405005&partnerID=40&md5=d56031633a9aa4a50d5d9c9e3612727f},
doi = {10.1051/e3sconf/201911405005},
year = {2019},
date = {2019-01-01},
journal = {E3S Web of Conferences},
volume = {114},
abstract = {Significant progress in the installation of renewable energy requires the improvement of energy production and storage technologies. Hydrogen energy storage systems based on reversible metal hydride materials can be used as an energy backup system. Metal hydride hydrogen storage systems are distinguished by a high degree of safety of their use, since hydrogen is stored in a solid phase, a high volumetric density of stored hydrogen, and the possibility of long-term storage without losses. A distinctive feature of metal hydride materials is the reversible and selective absorption and release of high-purity hydrogen. This paper presents experimental studies of LaNi5-based metal hydride materials with a useful hydrogen capacity of 1.0–1.3 wt.% H2 with equilibrium pressures of 0.025 - 0.05 MPa and 0.1 - 1.2 MPa at moderate temperatures of 295 - 353 K for the hydrogen purification systems and hydrogen long-term storage systems, respectively. The applicability of metal hydride technologies for renewable energy sources as energy storage systems in the form of hydrogen is also shown. © The Authors, published by EDP Sciences.},
note = {cited By 5},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Significant progress in the installation of renewable energy requires the improvement of energy production and storage technologies. Hydrogen energy storage systems based on reversible metal hydride materials can be used as an energy backup system. Metal hydride hydrogen storage systems are distinguished by a high degree of safety of their use, since hydrogen is stored in a solid phase, a high volumetric density of stored hydrogen, and the possibility of long-term storage without losses. A distinctive feature of metal hydride materials is the reversible and selective absorption and release of high-purity hydrogen. This paper presents experimental studies of LaNi5-based metal hydride materials with a useful hydrogen capacity of 1.0–1.3 wt.% H2 with equilibrium pressures of 0.025 - 0.05 MPa and 0.1 - 1.2 MPa at moderate temperatures of 295 - 353 K for the hydrogen purification systems and hydrogen long-term storage systems, respectively. The applicability of metal hydride technologies for renewable energy sources as energy storage systems in the form of hydrogen is also shown. © The Authors, published by EDP Sciences.
Schastlivtsev, A.; Dunikov, D.; Borzenko, V.
Experimental study of the processes in hydrogen-oxygen gas generator Journal Article
In: International Journal of Hydrogen Energy, vol. 44, no. 18, pp. 9450-9455, 2019, (cited By 9).
@article{Schastlivtsev20199450,
title = {Experimental study of the processes in hydrogen-oxygen gas generator},
author = {A. Schastlivtsev and D. Dunikov and V. Borzenko},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85062636252&doi=10.1016%2fj.ijhydene.2019.02.126&partnerID=40&md5=f90ef441c2d5d3f4af26c64f457ef9c7},
doi = {10.1016/j.ijhydene.2019.02.126},
year = {2019},
date = {2019-01-01},
journal = {International Journal of Hydrogen Energy},
volume = {44},
number = {18},
pages = {9450-9455},
abstract = {The paper presents a hydrogen-oxygen gas generator, which could be a key element of a novel scheme of hybrid hydrogen-air energy storage system, which proposes to store energy in both compressed air and hydrogen. At a power generation mode, hydrogen is combusted in oxygen, the produced steam is mixed with air and the gas mixture is used in a conventional gas turbine. The experimental hydrogen-oxygen gas generator has produced gas with temperatures 953–1163 K at pressures 2–4 MPa and has reached the thermal capacity up to 210 kW and thermal efficiency up to 95–99%. Separation of the combustion zone and air injection has helped to reduce NOx content in the product gas to 11 mg/st.m3. © 2019 Hydrogen Energy Publications LLC},
note = {cited By 9},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The paper presents a hydrogen-oxygen gas generator, which could be a key element of a novel scheme of hybrid hydrogen-air energy storage system, which proposes to store energy in both compressed air and hydrogen. At a power generation mode, hydrogen is combusted in oxygen, the produced steam is mixed with air and the gas mixture is used in a conventional gas turbine. The experimental hydrogen-oxygen gas generator has produced gas with temperatures 953–1163 K at pressures 2–4 MPa and has reached the thermal capacity up to 210 kW and thermal efficiency up to 95–99%. Separation of the combustion zone and air injection has helped to reduce NOx content in the product gas to 11 mg/st.m3. © 2019 Hydrogen Energy Publications LLC
Dunikov, D. O.; Blinov, D. V.
On efficiency of metal hydride extraction of hydrogen from a mixture with methane Conference
vol. 1359, no. 1, 2019, (cited By 0).
@conference{Dunikov2019b,
title = {On efficiency of metal hydride extraction of hydrogen from a mixture with methane},
author = {D. O. Dunikov and D. V. Blinov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85076498401&doi=10.1088%2f1742-6596%2f1359%2f1%2f012132&partnerID=40&md5=c2adee54c85a77146485cef41a65bae4},
doi = {10.1088/1742-6596/1359/1/012132},
year = {2019},
date = {2019-01-01},
journal = {Journal of Physics: Conference Series},
volume = {1359},
number = {1},
abstract = {Extraction of hydrogen from dilute mixtures with natural gas differs from traditional separation processes, since hydrogen is the minor component with low partial pressure. Metal hydrides absorb hydrogen selectively and can be used for purification. Exergy analysis shows that the metal hydride separation of binary mixture of a gas with hydrogen has a maximum at hydrogen content of 5-15%, and the main factors affecting efficiency are the need to spend heat to compensate the reaction enthalpy and pressure losses of methane during filtration through the metal hydride bed. We have experimentally demonstrated successful separation of the hydrogen (10%)-methane (90%) mixture at inlet pressure of 9.5 bar by the LaNi4.8Mn0.3Fe0.1 intermetallic compound in one step with roundtrip (absorption/desorption) hydrogen recovery of 74% and absorption hydrogen recovery of 76%, which is close to the value of 77% calculated based on the thermodynamic analysis. © Published under licence by IOP Publishing Ltd.},
note = {cited By 0},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Extraction of hydrogen from dilute mixtures with natural gas differs from traditional separation processes, since hydrogen is the minor component with low partial pressure. Metal hydrides absorb hydrogen selectively and can be used for purification. Exergy analysis shows that the metal hydride separation of binary mixture of a gas with hydrogen has a maximum at hydrogen content of 5-15%, and the main factors affecting efficiency are the need to spend heat to compensate the reaction enthalpy and pressure losses of methane during filtration through the metal hydride bed. We have experimentally demonstrated successful separation of the hydrogen (10%)-methane (90%) mixture at inlet pressure of 9.5 bar by the LaNi4.8Mn0.3Fe0.1 intermetallic compound in one step with roundtrip (absorption/desorption) hydrogen recovery of 74% and absorption hydrogen recovery of 76%, which is close to the value of 77% calculated based on the thermodynamic analysis. © Published under licence by IOP Publishing Ltd.
Schastlivtsev, A. I.; Borzenko, V. I.; Dunikov, D. O.
Improvement of efficiency of geothermal power plants by using hydrogen combustion technologies Conference
2019, (cited By 0).
@conference{Schastlivtsev2019c,
title = {Improvement of efficiency of geothermal power plants by using hydrogen combustion technologies},
author = {A. I. Schastlivtsev and V. I. Borzenko and D. O. Dunikov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85067450409&doi=10.1109%2fEastonf.2019.8725412&partnerID=40&md5=14006640e2ebd8bab496b4839122b21c},
doi = {10.1109/Eastonf.2019.8725412},
year = {2019},
date = {2019-01-01},
journal = {2019 International Science and Technology Conference "EastConf", EastConf 2019},
abstract = {Thermodynamic analysis of the integrated single-and double-flash power plant is performed in order to estimate possible gain from a hydrogen superheating of a secondary steam with the use of 50 MW Mutnovsky GeoPP-1 as an example. Hydrogen superheating of the steam flow in the second flash cycle with the high temperature steam from hydrogen-oxygen steam generator can increase steam temperature at turbine by 20-30 K and increase steam quality at turbine outlet by 2-4%. Additional available power can be increased by 5-10% (0.5-0.9 MW) and efficiency of the plant can be increased from 10.0% to 12.1%. The best effect for improvement of the steam cycle of Mutnovsky GeoPP-1 is obtained for temperatures below 100°C and combined double-flash binary plant with hydrogen steam superheating is proposed. © 2019 IEEE.},
note = {cited By 0},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Thermodynamic analysis of the integrated single-and double-flash power plant is performed in order to estimate possible gain from a hydrogen superheating of a secondary steam with the use of 50 MW Mutnovsky GeoPP-1 as an example. Hydrogen superheating of the steam flow in the second flash cycle with the high temperature steam from hydrogen-oxygen steam generator can increase steam temperature at turbine by 20-30 K and increase steam quality at turbine outlet by 2-4%. Additional available power can be increased by 5-10% (0.5-0.9 MW) and efficiency of the plant can be increased from 10.0% to 12.1%. The best effect for improvement of the steam cycle of Mutnovsky GeoPP-1 is obtained for temperatures below 100°C and combined double-flash binary plant with hydrogen steam superheating is proposed. © 2019 IEEE.
Dunikov, D. O.; Blinov, D. V.
On efficiency of metal hydride extraction of hydrogen from a mixture with methane Conference
vol. 1359, no. 1, 2019, (cited By 0).
@conference{Dunikov2019,
title = {On efficiency of metal hydride extraction of hydrogen from a mixture with methane},
author = {D. O. Dunikov and D. V. Blinov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85076498401&doi=10.1088%2f1742-6596%2f1359%2f1%2f012132&partnerID=40&md5=c2adee54c85a77146485cef41a65bae4},
doi = {10.1088/1742-6596/1359/1/012132},
year = {2019},
date = {2019-01-01},
journal = {Journal of Physics: Conference Series},
volume = {1359},
number = {1},
abstract = {Extraction of hydrogen from dilute mixtures with natural gas differs from traditional separation processes, since hydrogen is the minor component with low partial pressure. Metal hydrides absorb hydrogen selectively and can be used for purification. Exergy analysis shows that the metal hydride separation of binary mixture of a gas with hydrogen has a maximum at hydrogen content of 5-15%, and the main factors affecting efficiency are the need to spend heat to compensate the reaction enthalpy and pressure losses of methane during filtration through the metal hydride bed. We have experimentally demonstrated successful separation of the hydrogen (10%)-methane (90%) mixture at inlet pressure of 9.5 bar by the LaNi4.8Mn0.3Fe0.1 intermetallic compound in one step with roundtrip (absorption/desorption) hydrogen recovery of 74% and absorption hydrogen recovery of 76%, which is close to the value of 77% calculated based on the thermodynamic analysis. © Published under licence by IOP Publishing Ltd.},
note = {cited By 0},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Extraction of hydrogen from dilute mixtures with natural gas differs from traditional separation processes, since hydrogen is the minor component with low partial pressure. Metal hydrides absorb hydrogen selectively and can be used for purification. Exergy analysis shows that the metal hydride separation of binary mixture of a gas with hydrogen has a maximum at hydrogen content of 5-15%, and the main factors affecting efficiency are the need to spend heat to compensate the reaction enthalpy and pressure losses of methane during filtration through the metal hydride bed. We have experimentally demonstrated successful separation of the hydrogen (10%)-methane (90%) mixture at inlet pressure of 9.5 bar by the LaNi4.8Mn0.3Fe0.1 intermetallic compound in one step with roundtrip (absorption/desorption) hydrogen recovery of 74% and absorption hydrogen recovery of 76%, which is close to the value of 77% calculated based on the thermodynamic analysis. © Published under licence by IOP Publishing Ltd.
Dunikov, D. O.; Blinov, D. V.
Pressure artifacts at isothermal operation of a metal hydride tank Journal Article
In: International Journal of Hydrogen Energy, vol. 44, no. 14, pp. 7422-7427, 2019, (cited By 5).
@article{Dunikov20197422,
title = {Pressure artifacts at isothermal operation of a metal hydride tank},
author = {D. O. Dunikov and D. V. Blinov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85061728702&doi=10.1016%2fj.ijhydene.2019.01.278&partnerID=40&md5=70934f18995ad0042113681c8a9948cd},
doi = {10.1016/j.ijhydene.2019.01.278},
year = {2019},
date = {2019-01-01},
journal = {International Journal of Hydrogen Energy},
volume = {44},
number = {14},
pages = {7422-7427},
abstract = {The paper presents the results of experimental investigations on hydrogen absorption and desorption in the metal hydride reactor RS-1 containing 81 kg of La 0.5 Nd 0.5 Al 0.1 Fe 0.4 Co 0.2 Ni 4.3 intermetallic compound at 60 °C isothermal conditions. During the reactor-scale measurements of pressure-composition isotherms we observe pressure artifacts; pressures for absorption are higher and for desorption are lower than equilibrium pressures obtained after cooling down and reheating of the reactor. This thermal relaxation procedure removes the pressure artifacts. The observed effect is similar to the large aliquot effect, and mostly affects the desorption isotherm. The highest measured pressure difference is 0.7 bar (11%). © 2019 Hydrogen Energy Publications LLC},
note = {cited By 5},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The paper presents the results of experimental investigations on hydrogen absorption and desorption in the metal hydride reactor RS-1 containing 81 kg of La 0.5 Nd 0.5 Al 0.1 Fe 0.4 Co 0.2 Ni 4.3 intermetallic compound at 60 °C isothermal conditions. During the reactor-scale measurements of pressure-composition isotherms we observe pressure artifacts; pressures for absorption are higher and for desorption are lower than equilibrium pressures obtained after cooling down and reheating of the reactor. This thermal relaxation procedure removes the pressure artifacts. The observed effect is similar to the large aliquot effect, and mostly affects the desorption isotherm. The highest measured pressure difference is 0.7 bar (11%). © 2019 Hydrogen Energy Publications LLC
Schastlivtsev, A. I.; Borzenko, V. I.; Dunikov, D. O.
Improvement of efficiency of geothermal power plants by using hydrogen combustion technologies Conference
vol. 1370, no. 1, 2019, (cited By 0).
@conference{Schastlivtsev2019,
title = {Improvement of efficiency of geothermal power plants by using hydrogen combustion technologies},
author = {A. I. Schastlivtsev and V. I. Borzenko and D. O. Dunikov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85067450409&doi=10.1109%2fEastonf.2019.8725412&partnerID=40&md5=14006640e2ebd8bab496b4839122b21c},
doi = {10.1109/Eastonf.2019.8725412},
year = {2019},
date = {2019-01-01},
journal = {2019 International Science and Technology Conference "EastConf", EastConf 2019},
volume = {1370},
number = {1},
abstract = {Thermodynamic analysis of the integrated single-and double-flash power plant is performed in order to estimate possible gain from a hydrogen superheating of a secondary steam with the use of 50 MW Mutnovsky GeoPP-1 as an example. Hydrogen superheating of the steam flow in the second flash cycle with the high temperature steam from hydrogen-oxygen steam generator can increase steam temperature at turbine by 20-30 K and increase steam quality at turbine outlet by 2-4%. Additional available power can be increased by 5-10% (0.5-0.9 MW) and efficiency of the plant can be increased from 10.0% to 12.1%. The best effect for improvement of the steam cycle of Mutnovsky GeoPP-1 is obtained for temperatures below 100°C and combined double-flash binary plant with hydrogen steam superheating is proposed. © 2019 IEEE.},
note = {cited By 0},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Thermodynamic analysis of the integrated single-and double-flash power plant is performed in order to estimate possible gain from a hydrogen superheating of a secondary steam with the use of 50 MW Mutnovsky GeoPP-1 as an example. Hydrogen superheating of the steam flow in the second flash cycle with the high temperature steam from hydrogen-oxygen steam generator can increase steam temperature at turbine by 20-30 K and increase steam quality at turbine outlet by 2-4%. Additional available power can be increased by 5-10% (0.5-0.9 MW) and efficiency of the plant can be increased from 10.0% to 12.1%. The best effect for improvement of the steam cycle of Mutnovsky GeoPP-1 is obtained for temperatures below 100°C and combined double-flash binary plant with hydrogen steam superheating is proposed. © 2019 IEEE.
Borzenko, V. I.; Romanov, I. A.; Dunikov, D. O.; Kazakov, A. N.
Hydrogen sorption properties of metal hydride beds: Effect of internal stresses caused by reactor geometry Journal Article
In: International Journal of Hydrogen Energy, vol. 44, no. 12, pp. 6086-6092, 2019, (cited By 13).
@article{Borzenko20196086,
title = {Hydrogen sorption properties of metal hydride beds: Effect of internal stresses caused by reactor geometry},
author = {V. I. Borzenko and I. A. Romanov and D. O. Dunikov and A. N. Kazakov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85060769034&doi=10.1016%2fj.ijhydene.2019.01.052&partnerID=40&md5=27c6ea1d651918ce4dcc14dbdc83df8a},
doi = {10.1016/j.ijhydene.2019.01.052},
year = {2019},
date = {2019-01-01},
journal = {International Journal of Hydrogen Energy},
volume = {44},
number = {12},
pages = {6086-6092},
abstract = {A number of peculiarities in sorption behavior of metal hydride beds depending on the reactor geometry have been discovered. Comparison of PCT absorption and desorption isotherms was conducted for the same 500 g sample of La 0·9 Ce 0·1 Ni 5 -alloy and two different geometries: horizontal half-cylinder and vertical annular. This approach gives the way to directly investigate the influence of the bed geometry on the hydrogen sorption properties excluding the effect of other factors. The influence of the internal stresses in the fine dispersed beds of intermetallic compounds on their sorption properties is discussed in the present study. The occurrence of internal stresses in the vertical annular metal hydride bed results in the decrease of the hydrogen equilibrium pressure, increase of the enthalpy and entropy of hydrogen absorption and decrease of pressure hysteresis due to significantly stronger decrease of absorption pressure compared to desorption. The analysis of SEM images of the sample taken from the bottom of the working autoclave showed the presence of a macro particle which avoided the dispersion due to the agglomerated particles around. © 2019 Hydrogen Energy Publications LLC},
note = {cited By 13},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
A number of peculiarities in sorption behavior of metal hydride beds depending on the reactor geometry have been discovered. Comparison of PCT absorption and desorption isotherms was conducted for the same 500 g sample of La 0·9 Ce 0·1 Ni 5 -alloy and two different geometries: horizontal half-cylinder and vertical annular. This approach gives the way to directly investigate the influence of the bed geometry on the hydrogen sorption properties excluding the effect of other factors. The influence of the internal stresses in the fine dispersed beds of intermetallic compounds on their sorption properties is discussed in the present study. The occurrence of internal stresses in the vertical annular metal hydride bed results in the decrease of the hydrogen equilibrium pressure, increase of the enthalpy and entropy of hydrogen absorption and decrease of pressure hysteresis due to significantly stronger decrease of absorption pressure compared to desorption. The analysis of SEM images of the sample taken from the bottom of the working autoclave showed the presence of a macro particle which avoided the dispersion due to the agglomerated particles around. © 2019 Hydrogen Energy Publications LLC
2018
Blinov, D. V.; Borzenko, V. I.; Dunikov, D. O.; Kazakov, A. N.
Experimental investigations of thermal processes in the flow-throw hydrogen purification reactor Conference
vol. 1128, no. 1, 2018, (cited By 4).
@conference{Blinov2018,
title = {Experimental investigations of thermal processes in the flow-throw hydrogen purification reactor},
author = {D. V. Blinov and V. I. Borzenko and D. O. Dunikov and A. N. Kazakov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85058630755&doi=10.1088%2f1742-6596%2f1128%2f1%2f012120&partnerID=40&md5=c13d5d32ef0b0f173bdc0f54d3d0384a},
doi = {10.1088/1742-6596/1128/1/012120},
year = {2018},
date = {2018-01-01},
journal = {Journal of Physics: Conference Series},
volume = {1128},
number = {1},
abstract = {The paper presents experimental results of thermal processes investigations in flow type metal hydride hydrogen storage and purification reactor RSP-8(I). Thermal processes in the reactor during hydrogen separation from carbon dioxide are studied. Optimal operation parameters for hydrogen purification and performance efficiency of metal hydride reactor RSP-8(I) are defined experimentally. Investigations of heat and mass transfer inside a vertical metal hydride reactor RSP-8(I) with 1 kg of LaFe 0.1 Mn 0.3 Ni 4.8 show considerable non-uniformity of pressure inside the bed. If the reactor is charged from the top, the hydrogen pressure at the bottom is lower by 0.2-0.3 MPa, which results in earlier occurrence of heat and mass transfer crisis. © 2018 Institute of Physics Publishing. All rights reserved.},
note = {cited By 4},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
The paper presents experimental results of thermal processes investigations in flow type metal hydride hydrogen storage and purification reactor RSP-8(I). Thermal processes in the reactor during hydrogen separation from carbon dioxide are studied. Optimal operation parameters for hydrogen purification and performance efficiency of metal hydride reactor RSP-8(I) are defined experimentally. Investigations of heat and mass transfer inside a vertical metal hydride reactor RSP-8(I) with 1 kg of LaFe 0.1 Mn 0.3 Ni 4.8 show considerable non-uniformity of pressure inside the bed. If the reactor is charged from the top, the hydrogen pressure at the bottom is lower by 0.2-0.3 MPa, which results in earlier occurrence of heat and mass transfer crisis. © 2018 Institute of Physics Publishing. All rights reserved.
Borzenko, V. I.; Blinov, D. V.; Dunikov, D. O.; Leontiev, A. I.
Characteristic features of heat and mass transfer in hydrogen energy storage systems Conference
vol. 1128, no. 1, 2018, (cited By 5).
@conference{Borzenko2018,
title = {Characteristic features of heat and mass transfer in hydrogen energy storage systems},
author = {V. I. Borzenko and D. V. Blinov and D. O. Dunikov and A. I. Leontiev},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85058617469&doi=10.1088%2f1742-6596%2f1128%2f1%2f012126&partnerID=40&md5=5c05708f73143695d916c3db422b98fc},
doi = {10.1088/1742-6596/1128/1/012126},
year = {2018},
date = {2018-01-01},
journal = {Journal of Physics: Conference Series},
volume = {1128},
number = {1},
abstract = {Reversible metal hydrides are efficient solution for energy storage for distributed and autonomous power. Heat transfer is the major limiting factor for performance of metal hydride devices. Exothermic hydrogen absorption creates significant temperature gradients due to low effective thermal conductivity of powdered metal hydride beds. As the result of a strong dependence of absorption equilibrium pressure on temperature, this gradients lead to heat and mass transfer crisis and compositional inhomogeneities with high concentration of hydride phase near heat sinks and low concentration in the hot core of the bed. Development of the compositional inhomogeneities is accompanied by significant pressure drops over the bed, which can be measured experimentally. We performed experiments on hydrogen absorption in 1 kg metal hydride bed of of La 0.9 Ce 0.1 Ni 5 inside a water cooled reactor during charge at constant hydrogen flow within the range of 10-30 st.L/min at 0.59 MPa. Results show that heat and mass transfer crisis starts, when pressure in the reactor near hydrogen inlet becomes close to supply pressure, while pressure on the other side of the bed is lower by 0.15-0.25 MPa. These results confirm development of the hot core inside the bed, where reaction almost stops due to high temperature. © 2018 Institute of Physics Publishing. All rights reserved.},
note = {cited By 5},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Reversible metal hydrides are efficient solution for energy storage for distributed and autonomous power. Heat transfer is the major limiting factor for performance of metal hydride devices. Exothermic hydrogen absorption creates significant temperature gradients due to low effective thermal conductivity of powdered metal hydride beds. As the result of a strong dependence of absorption equilibrium pressure on temperature, this gradients lead to heat and mass transfer crisis and compositional inhomogeneities with high concentration of hydride phase near heat sinks and low concentration in the hot core of the bed. Development of the compositional inhomogeneities is accompanied by significant pressure drops over the bed, which can be measured experimentally. We performed experiments on hydrogen absorption in 1 kg metal hydride bed of of La 0.9 Ce 0.1 Ni 5 inside a water cooled reactor during charge at constant hydrogen flow within the range of 10-30 st.L/min at 0.59 MPa. Results show that heat and mass transfer crisis starts, when pressure in the reactor near hydrogen inlet becomes close to supply pressure, while pressure on the other side of the bed is lower by 0.15-0.25 MPa. These results confirm development of the hot core inside the bed, where reaction almost stops due to high temperature. © 2018 Institute of Physics Publishing. All rights reserved.
Dunikov, D. O.
Cycle improvement and hydrogen steam superheating at Mutnovsky geothermal power plant Journal Article
In: Case Studies in Thermal Engineering, vol. 12, pp. 736-741, 2018, (cited By 13).
@article{Dunikov2018736,
title = {Cycle improvement and hydrogen steam superheating at Mutnovsky geothermal power plant},
author = {D. O. Dunikov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85054911130&doi=10.1016%2fj.csite.2018.09.010&partnerID=40&md5=112f21077e9cfb13f13fee683730afc8},
doi = {10.1016/j.csite.2018.09.010},
year = {2018},
date = {2018-01-01},
journal = {Case Studies in Thermal Engineering},
volume = {12},
pages = {736-741},
abstract = {This study is aimed at a possibility of hydrogen production and hydrogen steam superheating at a single-flash 50 MW Mutnovsky geothermal power plant stage 1. A modification by introduction of a low-pressure single-flash unit utilizing energy of the separated liquid is proposed, and the integrated single- and double-flash cycle is analyzed. The second flash process gives a maximum possible increase of the installed capacity on 11.1 MW for the flash temperature of 92 °C, and 9 MW for 120 °C. Currently the plant does not use 12.3% of the geothermal steam for electricity generation, partly due to demand side management from a grid operator. Excess power can be used for water electrolysis and for each 1% of saved steam 92 t of H2 can be produced annually. Hydrogen combustion in a high temperature hydrogen-oxygen steam generator can be used for steam superheating in a second flash process, achieving the increase of steam temperature at the low pressure turbine inlet by 20-30 K, and an increase of steam dryness at the turbine outlet by 2-4%. Additional available power rises by 5-10% (0.5-0.9 MW) and overall thermal efficiency of the plant can be increased from 10% to 12.5%. © 2018 The Author.},
note = {cited By 13},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
This study is aimed at a possibility of hydrogen production and hydrogen steam superheating at a single-flash 50 MW Mutnovsky geothermal power plant stage 1. A modification by introduction of a low-pressure single-flash unit utilizing energy of the separated liquid is proposed, and the integrated single- and double-flash cycle is analyzed. The second flash process gives a maximum possible increase of the installed capacity on 11.1 MW for the flash temperature of 92 °C, and 9 MW for 120 °C. Currently the plant does not use 12.3% of the geothermal steam for electricity generation, partly due to demand side management from a grid operator. Excess power can be used for water electrolysis and for each 1% of saved steam 92 t of H2 can be produced annually. Hydrogen combustion in a high temperature hydrogen-oxygen steam generator can be used for steam superheating in a second flash process, achieving the increase of steam temperature at the low pressure turbine inlet by 20-30 K, and an increase of steam dryness at the turbine outlet by 2-4%. Additional available power rises by 5-10% (0.5-0.9 MW) and overall thermal efficiency of the plant can be increased from 10% to 12.5%. © 2018 The Author.
2017
Blinov, D. V.; Dunikov, D. O.; Kazakov, A. N.; Romanov, I. A.
vol. 891, no. 1, 2017, (cited By 4).
@conference{Blinov2017,
title = {Influence of geometrical non-uniformities of LaNi5 metal hydride bed on its structure and heat and mass transfer at hydrogen absorption},
author = {D. V. Blinov and D. O. Dunikov and A. N. Kazakov and I. A. Romanov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85037036827&doi=10.1088%2f1742-6596%2f891%2f1%2f012119&partnerID=40&md5=e6d4b0da3f4842ec4869e4a051f3fd44},
doi = {10.1088/1742-6596/891/1/012119},
year = {2017},
date = {2017-01-01},
journal = {Journal of Physics: Conference Series},
volume = {891},
number = {1},
abstract = {We perform cycling of a 500 g bed of La0.9Ce0.1Ni5 intermetallic compound in vertical and horizontal orientations with measurements of PCT isotherms, and further XRD and SEM investigation of bed structure. Significant decrease in equilibrium absorption pressure is observed in vertical orientation of the bed from 1.58 to 1.36 MPa at 333K, and from 2.68 to 2.51 MPa at 353K, accompanied by evident particle segregation by the bed height and densification at a bottom with formation of a robust agglomerate of small particles (< 10 μm) jointed with big particles of the size 100-200 μm, while particle size distribution in upper parts is more uniform with mean size about 10-20 μm. Fill density increases by 15% from the top to the bottom from 3.26 g/cm3 to 3.86 g/cm3 while structural properties of particles remain the same with X-ray density 8.31 g/cm3. Investigations of heat and mass transfer inside a vertical metal hydride reactor RSP-8 with 1 kg of La0.9Ce0.1Ni5 also show considerable non-uniformity of pressure inside the bed. If the reactor is charged from the top the hydrogen pressure at the bottom is lower on 0.2-0.3 MPa, which results in earlier occurrence of heat and mass transfer crisis. © Published under licence by IOP Publishing Ltd.},
note = {cited By 4},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
We perform cycling of a 500 g bed of La0.9Ce0.1Ni5 intermetallic compound in vertical and horizontal orientations with measurements of PCT isotherms, and further XRD and SEM investigation of bed structure. Significant decrease in equilibrium absorption pressure is observed in vertical orientation of the bed from 1.58 to 1.36 MPa at 333K, and from 2.68 to 2.51 MPa at 353K, accompanied by evident particle segregation by the bed height and densification at a bottom with formation of a robust agglomerate of small particles (< 10 μm) jointed with big particles of the size 100-200 μm, while particle size distribution in upper parts is more uniform with mean size about 10-20 μm. Fill density increases by 15% from the top to the bottom from 3.26 g/cm3 to 3.86 g/cm3 while structural properties of particles remain the same with X-ray density 8.31 g/cm3. Investigations of heat and mass transfer inside a vertical metal hydride reactor RSP-8 with 1 kg of La0.9Ce0.1Ni5 also show considerable non-uniformity of pressure inside the bed. If the reactor is charged from the top the hydrogen pressure at the bottom is lower on 0.2-0.3 MPa, which results in earlier occurrence of heat and mass transfer crisis. © Published under licence by IOP Publishing Ltd.
Kazakov, A. N.; Romanov, I. A.; Kuleshov, V. N.; Dunikov, D. O.
vol. 891, no. 1, 2017, (cited By 6).
@conference{Kazakov2017,
title = {Experimental investigations of adsorption characteristics and porosity of activated metal hydride powders},
author = {A. N. Kazakov and I. A. Romanov and V. N. Kuleshov and D. O. Dunikov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85037032939&doi=10.1088%2f1742-6596%2f891%2f1%2f012115&partnerID=40&md5=335c3da545e64a0d8896125851fa9d2e},
doi = {10.1088/1742-6596/891/1/012115},
year = {2017},
date = {2017-01-01},
journal = {Journal of Physics: Conference Series},
volume = {891},
number = {1},
abstract = {In the present work non-uniformities of microstructure, porosity and adsorption characteristics of La0.9Ce0.1Ni5 metal hydride by the height of the bed are investigated. A 500 g metal hydride bed was cycled inside a vertical metal hydride reactor and three samples was taken from top, middle and bottom of the bed. Non-uniform particle distributions and bed densification were observed, the bed porosity is around 0.58-0.67 at the top and middle parts of the bed and 0.46-0.54 at the bottom, where a dense and robust agglomerate was formed during the cycling. Specific surface area measured by nitrogen adsorption methods is 1.8-2.1 m2/g at the top of the bed, 4.2-5.4 m2/g in the middle and 1.1-1.5 m2/g at the bottom. The maximum is connected with higher degree of particle dispersion without effects from particle agglomeration. © Published under licence by IOP Publishing Ltd.},
note = {cited By 6},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
In the present work non-uniformities of microstructure, porosity and adsorption characteristics of La0.9Ce0.1Ni5 metal hydride by the height of the bed are investigated. A 500 g metal hydride bed was cycled inside a vertical metal hydride reactor and three samples was taken from top, middle and bottom of the bed. Non-uniform particle distributions and bed densification were observed, the bed porosity is around 0.58-0.67 at the top and middle parts of the bed and 0.46-0.54 at the bottom, where a dense and robust agglomerate was formed during the cycling. Specific surface area measured by nitrogen adsorption methods is 1.8-2.1 m2/g at the top of the bed, 4.2-5.4 m2/g in the middle and 1.1-1.5 m2/g at the bottom. The maximum is connected with higher degree of particle dispersion without effects from particle agglomeration. © Published under licence by IOP Publishing Ltd.
Borzenko, V. I.; Dunikov, D. O.
Feasibility analysis of a hydrogen backup power system for Russian telecom market Conference
vol. 891, no. 1, 2017, (cited By 4).
@conference{Borzenko2017,
title = {Feasibility analysis of a hydrogen backup power system for Russian telecom market},
author = {V. I. Borzenko and D. O. Dunikov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85037027183&doi=10.1088%2f1742-6596%2f891%2f1%2f012077&partnerID=40&md5=a97e75c0db38adfc108c425687b48e58},
doi = {10.1088/1742-6596/891/1/012077},
year = {2017},
date = {2017-01-01},
journal = {Journal of Physics: Conference Series},
volume = {891},
number = {1},
abstract = {We performed feasibility analysis of 10 kW hydrogen backup power system (H2BS) consisting of a water electrolyzer, a metal hydride hydrogen storage and a fuel cell. Capital investments in H2BS are mostly determined by the costs of the PEM electrolyzer, the fuel cell and solid state hydrogen storage materials, for single unit or small series manufacture the cost of AB5-type intermetallic compound can reach 50% of total system cost. Today the capital investments in H2BS are 3 times higher than in conventional lead-acid system of the same capacity. Wide distribution of fuel cell hydrogen vehicles, development of hydrogen infrastructure, and mass production of hydrogen power systems will for sure lower capital investments in fuel cell backup power. Operational expenditures for H2BS is only 15% from the expenditures for lead acid systems, and after 4-5 years of exploitation the total cost of ownership will become lower than for batteries. © Published under licence by IOP Publishing Ltd.},
note = {cited By 4},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
We performed feasibility analysis of 10 kW hydrogen backup power system (H2BS) consisting of a water electrolyzer, a metal hydride hydrogen storage and a fuel cell. Capital investments in H2BS are mostly determined by the costs of the PEM electrolyzer, the fuel cell and solid state hydrogen storage materials, for single unit or small series manufacture the cost of AB5-type intermetallic compound can reach 50% of total system cost. Today the capital investments in H2BS are 3 times higher than in conventional lead-acid system of the same capacity. Wide distribution of fuel cell hydrogen vehicles, development of hydrogen infrastructure, and mass production of hydrogen power systems will for sure lower capital investments in fuel cell backup power. Operational expenditures for H2BS is only 15% from the expenditures for lead acid systems, and after 4-5 years of exploitation the total cost of ownership will become lower than for batteries. © Published under licence by IOP Publishing Ltd.
2016
Dunikov, D.; Borzenko, V.; Blinov, D.; Kazakov, A.; Lin, C. -Y.; Wu, S. -Y.; Chu, C. -Y.
Biohydrogen purification using metal hydride technologies Journal Article
In: International Journal of Hydrogen Energy, vol. 41, no. 46, pp. 21787-21794, 2016, (cited By 33).
@article{Dunikov201621787,
title = {Biohydrogen purification using metal hydride technologies},
author = {D. Dunikov and V. Borzenko and D. Blinov and A. Kazakov and C. -Y. Lin and S. -Y. Wu and C. -Y. Chu},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84997831598&doi=10.1016%2fj.ijhydene.2016.08.190&partnerID=40&md5=6190ee98cd5996164695721cc89aa4b5},
doi = {10.1016/j.ijhydene.2016.08.190},
year = {2016},
date = {2016-01-01},
journal = {International Journal of Hydrogen Energy},
volume = {41},
number = {46},
pages = {21787-21794},
abstract = {Metal hydrides are known for their ability of selective hydrogen absorption and might be used for hydrogen purification. We demonstrate separation of hydrogen/carbon dioxide mixtures with the use of two AB5-type alloys. A metal hydride reactor was filled with 1 kg of “high-pressure” alloy La0.9Ce0.1Ni5 (Peq = 1.96 bar at 293 K) and 1 kg of “low-pressure” alloy LaNi4.8Mn0.3Fe0.1 (Peq = 0.38 bar at 293 K), maximum H2 capacity is 140 st.L, nominal operating H2 capacity is 110 st.L. Hydrogen concentration was in the range 40–60 vol.%, feed pressure 5.6 bar. Separation efficiency and hydrogen recovery depend on equilibrium pressure of absorption, which has to be as low as possible to increase hydrogen recovery. The purification rate of 81 st.L/h from a mixture containing 59 vol.% of hydrogen with recovery 94% was achieved for the “low-pressure” alloy. The results show that metal hydride H2/CO2 separation unit can be a second stage of a biohydrogen upgrade system after a membrane module. Polymer membranes can defend metal hydrides from poisonous impurities and high selectivity of metal hydrides can improve the overall performance of the purification system. © 2016 Hydrogen Energy Publications LLC},
note = {cited By 33},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Metal hydrides are known for their ability of selective hydrogen absorption and might be used for hydrogen purification. We demonstrate separation of hydrogen/carbon dioxide mixtures with the use of two AB5-type alloys. A metal hydride reactor was filled with 1 kg of “high-pressure” alloy La0.9Ce0.1Ni5 (Peq = 1.96 bar at 293 K) and 1 kg of “low-pressure” alloy LaNi4.8Mn0.3Fe0.1 (Peq = 0.38 bar at 293 K), maximum H2 capacity is 140 st.L, nominal operating H2 capacity is 110 st.L. Hydrogen concentration was in the range 40–60 vol.%, feed pressure 5.6 bar. Separation efficiency and hydrogen recovery depend on equilibrium pressure of absorption, which has to be as low as possible to increase hydrogen recovery. The purification rate of 81 st.L/h from a mixture containing 59 vol.% of hydrogen with recovery 94% was achieved for the “low-pressure” alloy. The results show that metal hydride H2/CO2 separation unit can be a second stage of a biohydrogen upgrade system after a membrane module. Polymer membranes can defend metal hydrides from poisonous impurities and high selectivity of metal hydrides can improve the overall performance of the purification system. © 2016 Hydrogen Energy Publications LLC
Kazakov, A. N.; Dunikov, D. O.; Mitrokhin, S. V.
AB5-type intermetallic compounds for biohydrogen purification and storage Journal Article
In: International Journal of Hydrogen Energy, vol. 41, no. 46, pp. 21774-21779, 2016, (cited By 8).
@article{Kazakov201621774,
title = {AB5-type intermetallic compounds for biohydrogen purification and storage},
author = {A. N. Kazakov and D. O. Dunikov and S. V. Mitrokhin},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84994137710&doi=10.1016%2fj.ijhydene.2016.07.243&partnerID=40&md5=03f579d597dba46dfbe80c3b46630846},
doi = {10.1016/j.ijhydene.2016.07.243},
year = {2016},
date = {2016-01-01},
journal = {International Journal of Hydrogen Energy},
volume = {41},
number = {46},
pages = {21774-21779},
abstract = {Intermetallic compounds (IMC) provide a promising solution for a biohydrogen purification problem due to their selective hydrogen absorption from gaseous mixtures produced during dark fermentation. A main IMC characteristic for use in biohydrogen purification is hydrogen equilibrium pressure, which has to be as low as possible during hydrogen sorption from a mixture. Intermetallic compounds LaNi5–xMx (M−Al, Sn, Fe; x = 0.1–0.3) were prepared and their PCT properties were investigated. Compositions LaNi4.6Fe0.2Al0.2 (0.049 MPa at 293 K) and LaNi4.6Sn0.2Fe0.2 (0.055 MPa at 293 K) are found to be the most promising for practical applications due to low equilibrium pressures. © 2016 Hydrogen Energy Publications LLC},
note = {cited By 8},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Intermetallic compounds (IMC) provide a promising solution for a biohydrogen purification problem due to their selective hydrogen absorption from gaseous mixtures produced during dark fermentation. A main IMC characteristic for use in biohydrogen purification is hydrogen equilibrium pressure, which has to be as low as possible during hydrogen sorption from a mixture. Intermetallic compounds LaNi5–xMx (M−Al, Sn, Fe; x = 0.1–0.3) were prepared and their PCT properties were investigated. Compositions LaNi4.6Fe0.2Al0.2 (0.049 MPa at 293 K) and LaNi4.6Sn0.2Fe0.2 (0.055 MPa at 293 K) are found to be the most promising for practical applications due to low equilibrium pressures. © 2016 Hydrogen Energy Publications LLC