1.
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
2.
Aminov, R. Z.; Schastlivtsev, A. I.; Bayramov, A. N.
Experimental results of the study of underburned hydrogen during burning in oxygen medium Journal Article
In: International Journal of Hydrogen Energy, vol. 47, no. 65, pp. 28176-28187, 2022, (cited By 0).
@article{Aminov202228176,
title = {Experimental results of the study of underburned hydrogen during burning in oxygen medium},
author = {R. Z. Aminov and A. I. Schastlivtsev and A. N. Bayramov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85135189867&doi=10.1016%2fj.ijhydene.2022.06.234&partnerID=40&md5=757e2f2276e04909a5882a00a88a9ec0},
doi = {10.1016/j.ijhydene.2022.06.234},
year = {2022},
date = {2022-01-01},
journal = {International Journal of Hydrogen Energy},
volume = {47},
number = {65},
pages = {28176-28187},
abstract = {The area of research is the experimental study of the composition of steam as a result of the combustion of hydrogen in an oxygen atmosphere in order to assess the underburning of hydrogen. The existing experience of experimental research on the combustion of hydrogen in an oxygen atmosphere is analyzed. Among the known works, the underburning of hydrogen was determined after mixing the dissociated vapor with a cooling component, which contributes to its sharp decrease in temperature. As a result, this leads to a decrease in the number of recombinations of unreacted hydrogen towards the formation of steam, which leads to an increased content of hydrogen in the steam. A large number of works are devoted to the combustion of various types of fuel with hydrogen additives in internal combustion engines in a number of European and Asian countries. The purpose of the article is to supplement and summarize a series of experiments on the study of hydrogen underburning when burning in an oxygen atmosphere without using a cooling component for mixing with combustion products (water vapor). Only external cooling of the flame tube of the experimental setup was used. This experiment was performed for the first time. For the conditions of experiments carried out by the authors of the article, a diagram, components and measuring instruments of the experimental setup are presented. The initial data on the pressure and temperature of hydrogen, oxygen, cooling water are given. The main expressions of the procedure for determining the underburning of hydrogen are given. The main results of experimental measurements are presented. The graphical results of measuring the steam temperature along the length of the flame tube of the experimental setup, the flow rates of hydrogen and oxygen, the temperature and flow rate of cooling water, the pressure inside the flame tube and in the steam extraction pipeline for chemical analysis are shown. On the basis of generalization of a series of experiments, an exponential character of the decrease in the underburning of hydrogen along the length of the flame tube of the experimental setup was obtained, which indicates the intense processes of hydrogen recombination towards the formation of steam. It was found that during the time of 0.069 s with the movement of dissociated steam inside a flame tube 980 mm long, the underburning of hydrogen decreases from 5.85 to 0.016% of the mass during stoichiometric combustion and to 0.0138% of the mass with an excess of the oxidant equal to 1.4. © 2022 Hydrogen Energy Publications LLC},
note = {cited By 0},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The area of research is the experimental study of the composition of steam as a result of the combustion of hydrogen in an oxygen atmosphere in order to assess the underburning of hydrogen. The existing experience of experimental research on the combustion of hydrogen in an oxygen atmosphere is analyzed. Among the known works, the underburning of hydrogen was determined after mixing the dissociated vapor with a cooling component, which contributes to its sharp decrease in temperature. As a result, this leads to a decrease in the number of recombinations of unreacted hydrogen towards the formation of steam, which leads to an increased content of hydrogen in the steam. A large number of works are devoted to the combustion of various types of fuel with hydrogen additives in internal combustion engines in a number of European and Asian countries. The purpose of the article is to supplement and summarize a series of experiments on the study of hydrogen underburning when burning in an oxygen atmosphere without using a cooling component for mixing with combustion products (water vapor). Only external cooling of the flame tube of the experimental setup was used. This experiment was performed for the first time. For the conditions of experiments carried out by the authors of the article, a diagram, components and measuring instruments of the experimental setup are presented. The initial data on the pressure and temperature of hydrogen, oxygen, cooling water are given. The main expressions of the procedure for determining the underburning of hydrogen are given. The main results of experimental measurements are presented. The graphical results of measuring the steam temperature along the length of the flame tube of the experimental setup, the flow rates of hydrogen and oxygen, the temperature and flow rate of cooling water, the pressure inside the flame tube and in the steam extraction pipeline for chemical analysis are shown. On the basis of generalization of a series of experiments, an exponential character of the decrease in the underburning of hydrogen along the length of the flame tube of the experimental setup was obtained, which indicates the intense processes of hydrogen recombination towards the formation of steam. It was found that during the time of 0.069 s with the movement of dissociated steam inside a flame tube 980 mm long, the underburning of hydrogen decreases from 5.85 to 0.016% of the mass during stoichiometric combustion and to 0.0138% of the mass with an excess of the oxidant equal to 1.4. © 2022 Hydrogen Energy Publications LLC
3.
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.
4.
Blinov, D. V.; Borzenko, V. I.; Bezdudny, A. V.; Kazakov, A. N.
Metal hydride hydrogen storage and purification technologies Conference
vol. 2039, no. 1, 2021, (cited By 0).
@conference{Blinov2021,
title = {Metal hydride hydrogen storage and purification technologies},
author = {D. V. Blinov and V. I. Borzenko and A. V. Bezdudny and A. N. Kazakov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85119679560&doi=10.1088%2f1742-6596%2f2039%2f1%2f012005&partnerID=40&md5=250e27dd35a9985271ec61e94d01d6b6},
doi = {10.1088/1742-6596/2039/1/012005},
year = {2021},
date = {2021-01-01},
journal = {Journal of Physics: Conference Series},
volume = {2039},
number = {1},
abstract = {The results of the development of metal hydride (MH) reactors for the storage and purification of hydrogen of various types are presented. Two methods of metal hydride purification of hydrogen are presented. The use of the MH method of flow-through purification of hydrogen has high hydrogen recovery rates at high volume contents of hydrogen in the mixture (≥10% vol.), while the method of periodic evacuation of accumulated impurities is most effective at low hydrogen contents in the mixture (<10% vol.). © 2021 Institute of Physics Publishing. All rights reserved.},
note = {cited By 0},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
The results of the development of metal hydride (MH) reactors for the storage and purification of hydrogen of various types are presented. Two methods of metal hydride purification of hydrogen are presented. The use of the MH method of flow-through purification of hydrogen has high hydrogen recovery rates at high volume contents of hydrogen in the mixture (≥10% vol.), while the method of periodic evacuation of accumulated impurities is most effective at low hydrogen contents in the mixture (<10% vol.). © 2021 Institute of Physics Publishing. All rights reserved.
5.
Schastlivtsev, A. I.; Borzenko, V. I.
vol. 2039, no. 1, 2021, (cited By 0).
@conference{Schastlivtsev2021,
title = {Features of thermodynamic and thermal processes in hydrogen combustion units and systems on their basis},
author = {A. I. Schastlivtsev and V. I. Borzenko},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85119674095&doi=10.1088%2f1742-6596%2f2039%2f1%2f012032&partnerID=40&md5=4d6ebaf8d165b22c1769893ee47e046a},
doi = {10.1088/1742-6596/2039/1/012032},
year = {2021},
date = {2021-01-01},
journal = {Journal of Physics: Conference Series},
volume = {2039},
number = {1},
abstract = {The main types and designs of hydrogen combustion units (HCU), including hydrogen-oxygen steam generators, superheaters and air heaters of various power levels, are considered. The main problems arising in the development, creation and testing of such installations are determined, including the problems of cooling the most heat-stressed units, mixing of the main components of the fuel and oxidizer, mixing of high-temperature combustion products and ballasting components, problems associated with the completeness of hydrogen combustion and ensuring safety during operation. © 2021 Institute of Physics Publishing. All rights reserved.},
note = {cited By 0},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
The main types and designs of hydrogen combustion units (HCU), including hydrogen-oxygen steam generators, superheaters and air heaters of various power levels, are considered. The main problems arising in the development, creation and testing of such installations are determined, including the problems of cooling the most heat-stressed units, mixing of the main components of the fuel and oxidizer, mixing of high-temperature combustion products and ballasting components, problems associated with the completeness of hydrogen combustion and ensuring safety during operation. © 2021 Institute of Physics Publishing. All rights reserved.
6.
Romanov, I. A.; Borzenko, V. I.; Kazakov, A. N.
vol. 2057, no. 1, 2021, (cited By 0).
@conference{Romanov2021,
title = {Comparing hydrogen absorption kinetics of the samples of intermetallic compound and metal hydride compact on its basis},
author = {I. A. Romanov and V. I. Borzenko and A. N. Kazakov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85119615732&doi=10.1088%2f1742-6596%2f2057%2f1%2f012043&partnerID=40&md5=75d733724ea1fda713219ca2a07e48d6},
doi = {10.1088/1742-6596/2057/1/012043},
year = {2021},
date = {2021-01-01},
journal = {Journal of Physics: Conference Series},
volume = {2057},
number = {1},
abstract = {This work is devoted to an experimental study and comparison of the kinetics of hydrogen absorption by an intermetallic compound LaNi4.4Al0.3Fe0.3 in form of pure intermetallic compound free backfill and a compact based on it obtained by cold pressing with a spiral matrix of nickel-foam. To calculate the kinetic parameters of the hydrogen absorption reaction, the initial rates method is used. The PCT absorption isotherms are measured at temperatures of 313, 333, and 353 K. The experimental data are described with quite high confidence by the chosen model, which assumes that the reaction rate controlling step is the dissociative absorption of hydrogen on the surface of the α-phase. The rate of hydrogen absorption increases with increasing pressure drop and temperature. It is shown that the rate of hydrogen absorption by the sample of pure IMC is significantly less dependent on temperature compared to the compact sample. In addition, the reaction rate at temperatures of 313 and 333 K is higher for the free backfill sample, and at 353 K it is higher for the metal hydride compact. The values of the absorption constant and the activation energy of the hydrogen absorption reaction are determined for both samples. © 2021 Institute of Physics Publishing. All rights reserved.},
note = {cited By 0},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
This work is devoted to an experimental study and comparison of the kinetics of hydrogen absorption by an intermetallic compound LaNi4.4Al0.3Fe0.3 in form of pure intermetallic compound free backfill and a compact based on it obtained by cold pressing with a spiral matrix of nickel-foam. To calculate the kinetic parameters of the hydrogen absorption reaction, the initial rates method is used. The PCT absorption isotherms are measured at temperatures of 313, 333, and 353 K. The experimental data are described with quite high confidence by the chosen model, which assumes that the reaction rate controlling step is the dissociative absorption of hydrogen on the surface of the α-phase. The rate of hydrogen absorption increases with increasing pressure drop and temperature. It is shown that the rate of hydrogen absorption by the sample of pure IMC is significantly less dependent on temperature compared to the compact sample. In addition, the reaction rate at temperatures of 313 and 333 K is higher for the free backfill sample, and at 353 K it is higher for the metal hydride compact. The values of the absorption constant and the activation energy of the hydrogen absorption reaction are determined for both samples. © 2021 Institute of Physics Publishing. All rights reserved.
7.
Romanov, I.; Borzenko, V.; Eronin, A.; Kazakov, A.
Influence of electrostatic field on the interaction of AB5-type alloy LaNi4.4Al0.3Fe0.3 with hydrogen Journal Article
In: International Journal of Hydrogen Energy, vol. 46, no. 25, pp. 13632-13637, 2021, (cited By 0).
@article{Romanov202113632,
title = {Influence of electrostatic field on the interaction of AB5-type alloy LaNi4.4Al0.3Fe0.3 with hydrogen},
author = {I. Romanov and V. Borzenko and A. Eronin and A. Kazakov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85096534062&doi=10.1016%2fj.ijhydene.2020.10.207&partnerID=40&md5=6799237850882888f802b1b191b53a12},
doi = {10.1016/j.ijhydene.2020.10.207},
year = {2021},
date = {2021-01-01},
journal = {International Journal of Hydrogen Energy},
volume = {46},
number = {25},
pages = {13632-13637},
abstract = {The effect of the electrostatic field on hydrogen absorption is experimentally studied for the case of AB5-type intermetallic compound LaNi4.4Al0.3Fe0.3 with low equilibrium pressure. Experimental facility contained control and measurement system for PCT-isotherms and a non-conductive polymer vessel immersed in a bath of a thermostat with transformer oil. The test sample with 100 g of the activated alloy powder was used. Electrostatic field was created between a copper tube, which simultaneously served as a hydrogen inlet, connected to a high voltage source and a grounded nickel plate rolled in the form of a cylinder around the outer wall of the vessel. The electrodes were arranged coaxially, the maximum voltage on the internal electrode was 15 kV. The high voltage source also allowed changing the polarity on the internal electrode. It was found that the electrostatic field had no effect on the already established equilibrium in the hydrogen-alloy system at a voltage at the electrode up to 15 kV, regardless of the polarity. However, the process of hydrogen absorption is noticeably slowed down when a voltage of up to 15 kV with negative polarity is applied to the internal electrode, and the effect increases with increasing voltage. At a voltage of 15 kV and the positive polarity of the internal electrode, there was no noticeable effect on the hydrogen absorption process. © 2020 Hydrogen Energy Publications LLC},
note = {cited By 0},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The effect of the electrostatic field on hydrogen absorption is experimentally studied for the case of AB5-type intermetallic compound LaNi4.4Al0.3Fe0.3 with low equilibrium pressure. Experimental facility contained control and measurement system for PCT-isotherms and a non-conductive polymer vessel immersed in a bath of a thermostat with transformer oil. The test sample with 100 g of the activated alloy powder was used. Electrostatic field was created between a copper tube, which simultaneously served as a hydrogen inlet, connected to a high voltage source and a grounded nickel plate rolled in the form of a cylinder around the outer wall of the vessel. The electrodes were arranged coaxially, the maximum voltage on the internal electrode was 15 kV. The high voltage source also allowed changing the polarity on the internal electrode. It was found that the electrostatic field had no effect on the already established equilibrium in the hydrogen-alloy system at a voltage at the electrode up to 15 kV, regardless of the polarity. However, the process of hydrogen absorption is noticeably slowed down when a voltage of up to 15 kV with negative polarity is applied to the internal electrode, and the effect increases with increasing voltage. At a voltage of 15 kV and the positive polarity of the internal electrode, there was no noticeable effect on the hydrogen absorption process. © 2020 Hydrogen Energy Publications LLC
8.
Tomarov, G. V.; Borzenko, V. I.; Shipkov, A. A.
Application of Hydrogen–Oxygen Steam Generators for Secondary Flash Steam Superheating at Geothermal Power Plants Journal Article
In: Thermal Engineering, vol. 68, no. 1, pp. 45-53, 2021, (cited By 1).
@article{Tomarov202145,
title = {Application of Hydrogen–Oxygen Steam Generators for Secondary Flash Steam Superheating at Geothermal Power Plants},
author = {G. V. Tomarov and V. I. Borzenko and A. A. Shipkov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85100605035&doi=10.1134%2fS0040601520120101&partnerID=40&md5=ec7a3e0f5d6dd61c209e81e662542519},
doi = {10.1134/S0040601520120101},
year = {2021},
date = {2021-01-01},
journal = {Thermal Engineering},
volume = {68},
number = {1},
pages = {45-53},
abstract = {Abstract—: One of the promising areas of applying hydrogen technologies in power engineering is to increase the capacity utilization factor and efficiency of turbine units by means of hydrogen–oxygen steam generators for superheating the working medium under the conditions in which the surplus electricity generated at power plants during the periods of daily and seasonal reduction in electric power consumption can be used for generating hydrogen. The use of steam superheating systems on the basis of hydrogen–oxygen steam generators at geothermal power plants is especially important in view of a low energy potential of geothermal heat carrier serving as the initial heat source. The article presents the results from computational studies of the technical advisability and technical-economic efficiency of implementing systems for increasing the secondary flash steam energy potential by using a hydrogen–oxygen steam generator and a binary power unit at a direct-cycle geothermal power plant operating on steam hydrotherms. The results from computational studies into the power characteristics of a combined binary cycle geothermal power plant with secondary flash steam superheating depending on the expansion pressure variations and the hydrogen–oxygen steam generator capacity are considered. It has been determined that the use of a 12-MW hydrogen–oxygen steam generator for superheating secondary flash steam results in that the steam wetness downstream of the steam turbine last stage decreases from 14 to 7%. Calculation results have shown that the topping of a direct-cycle geothermal power plant with a system for increasing the energy potential of secondary flash steam on the basis of a hydrogen–oxygen steam generator and a binary power plant makes it possible to increase the geothermal power plant capacity by almost 25% and its efficiency by 3.0–3.5%. Based on the feasibility study results, investors can select the optimal composition and characteristics of equipment in implementing a system for increasing the energy potential of secondary flash steam using a hydrogen–oxygen steam generator and a binary power unit at a direct-cycle geothermal power plant. © 2021, Pleiades Publishing, Inc.},
note = {cited By 1},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Abstract—: One of the promising areas of applying hydrogen technologies in power engineering is to increase the capacity utilization factor and efficiency of turbine units by means of hydrogen–oxygen steam generators for superheating the working medium under the conditions in which the surplus electricity generated at power plants during the periods of daily and seasonal reduction in electric power consumption can be used for generating hydrogen. The use of steam superheating systems on the basis of hydrogen–oxygen steam generators at geothermal power plants is especially important in view of a low energy potential of geothermal heat carrier serving as the initial heat source. The article presents the results from computational studies of the technical advisability and technical-economic efficiency of implementing systems for increasing the secondary flash steam energy potential by using a hydrogen–oxygen steam generator and a binary power unit at a direct-cycle geothermal power plant operating on steam hydrotherms. The results from computational studies into the power characteristics of a combined binary cycle geothermal power plant with secondary flash steam superheating depending on the expansion pressure variations and the hydrogen–oxygen steam generator capacity are considered. It has been determined that the use of a 12-MW hydrogen–oxygen steam generator for superheating secondary flash steam results in that the steam wetness downstream of the steam turbine last stage decreases from 14 to 7%. Calculation results have shown that the topping of a direct-cycle geothermal power plant with a system for increasing the energy potential of secondary flash steam on the basis of a hydrogen–oxygen steam generator and a binary power plant makes it possible to increase the geothermal power plant capacity by almost 25% and its efficiency by 3.0–3.5%. Based on the feasibility study results, investors can select the optimal composition and characteristics of equipment in implementing a system for increasing the energy potential of secondary flash steam using a hydrogen–oxygen steam generator and a binary power unit at a direct-cycle geothermal power plant. © 2021, Pleiades Publishing, Inc.
9.
Kazakov, A. N.; Blinov, D. V.; Bodikov, V. Y.; Mitrokhin, S. V.; Volodin, A. A.
Hydrogen storage and electrochemical properties of annealed low-Co AB5 type intermetallic compounds Journal Article
In: International Journal of Hydrogen Energy, vol. 46, no. 25, pp. 13622-13631, 2021, (cited By 5).
@article{Kazakov202113622,
title = {Hydrogen storage and electrochemical properties of annealed low-Co AB5 type intermetallic compounds},
author = {A. N. Kazakov and D. V. Blinov and V. Y. Bodikov and S. V. Mitrokhin and A. A. Volodin},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85098537589&doi=10.1016%2fj.ijhydene.2020.12.071&partnerID=40&md5=3578969d44202cbe9c097e6b4c9c4eb4},
doi = {10.1016/j.ijhydene.2020.12.071},
year = {2021},
date = {2021-01-01},
journal = {International Journal of Hydrogen Energy},
volume = {46},
number = {25},
pages = {13622-13631},
abstract = {The structure, hydrogen storage and electrochemical properties of annealed low-Co AB5-type intermetallic compounds have been investigated. La-alloy, Nd-alloy and Cr-alloy are used to represent La0.8Ce0.2Ni4Co0.4Mn0.3Al0.3, La0.6Ce0.2Nd0.2Ni4Co0.4Mn0.3Al0.3 and La0.6Ce0.2Nd0.2Ni3.8Co0.4Mn0.3Al0.3Cr0.2, respectively. The XRD results indicated that annealed samples are all single-phase alloys with CaCu5 type structure. The maximum of both hydrogen content and discharge capacity is obtained for La-alloy 1.23 wt%H2 and 321.1 mA h/g, respectively. All the investigated alloys are quiet stable with ΔH of hydrogen desorption about 36–38 kJ/mol H2. Cycle life of alloy electrode has been improved by partial substitution of La for Nd and Ni for Cr. The highest capacity retention of 92.2% after 100 charge/discharge cycles at 1C has been observed for Nd-alloy. The hydrogen diffusion coefficient measured by PITT is higher at the start of charging process and dramatically reduces by 2–3 order of magnitude with saturation of β-hydride. The highest value 6.9 × 10−13 cm2/s is observed for La alloy at 100% SOC. Partial substitution La for Nd and Cr for Ni in low-Co AB5 metal hydride alloys slightly reduces maximum discharge capacity, HRD performance and hydrogen diffusion kinetics. Low-Co alloys show good overall electrochemical properties compared to high-Co alloys and might be perspective materials for various electrochemical applications. © 2020 Hydrogen Energy Publications LLC},
note = {cited By 5},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The structure, hydrogen storage and electrochemical properties of annealed low-Co AB5-type intermetallic compounds have been investigated. La-alloy, Nd-alloy and Cr-alloy are used to represent La0.8Ce0.2Ni4Co0.4Mn0.3Al0.3, La0.6Ce0.2Nd0.2Ni4Co0.4Mn0.3Al0.3 and La0.6Ce0.2Nd0.2Ni3.8Co0.4Mn0.3Al0.3Cr0.2, respectively. The XRD results indicated that annealed samples are all single-phase alloys with CaCu5 type structure. The maximum of both hydrogen content and discharge capacity is obtained for La-alloy 1.23 wt%H2 and 321.1 mA h/g, respectively. All the investigated alloys are quiet stable with ΔH of hydrogen desorption about 36–38 kJ/mol H2. Cycle life of alloy electrode has been improved by partial substitution of La for Nd and Ni for Cr. The highest capacity retention of 92.2% after 100 charge/discharge cycles at 1C has been observed for Nd-alloy. The hydrogen diffusion coefficient measured by PITT is higher at the start of charging process and dramatically reduces by 2–3 order of magnitude with saturation of β-hydride. The highest value 6.9 × 10−13 cm2/s is observed for La alloy at 100% SOC. Partial substitution La for Nd and Cr for Ni in low-Co AB5 metal hydride alloys slightly reduces maximum discharge capacity, HRD performance and hydrogen diffusion kinetics. Low-Co alloys show good overall electrochemical properties compared to high-Co alloys and might be perspective materials for various electrochemical applications. © 2020 Hydrogen Energy Publications LLC
10.
Molotov, I. M.; Schastlivtsev, A. I.; Yamshchikova, L. V.; Molotova, I. A.
vol. 2039, no. 1, 2021, (cited By 0).
@conference{Molotov2021,
title = {Development of an automated system for experimental investigation of thermal processes in a hydrogen-oxygen steam generator},
author = {I. M. Molotov and A. I. Schastlivtsev and L. V. Yamshchikova and I. A. Molotova},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85119692956&doi=10.1088%2f1742-6596%2f2039%2f1%2f012023&partnerID=40&md5=87f177e5f5bb9d579b06728806ef9f7f},
doi = {10.1088/1742-6596/2039/1/012023},
year = {2021},
date = {2021-01-01},
journal = {Journal of Physics: Conference Series},
volume = {2039},
number = {1},
abstract = {The paper presents the results of the development and creation of an automated system of scientific research (ASSR). It provides experimental studies of heat and mass transfer processes in a hydrogen-oxygen steam generator (HOSG). The most relevant fields of application of hydrogen-oxygen steam generators are considered. The paper discusses the most relevant areas of application of hydrogen-oxygen steam generators, scientific and technical barriers to the introduction of technology and the features of the construction of ASSR for experimental research. The schematic diagram of the primary measuring transducers and the control mechanisms of the experimental stand are described. The choice of the configuration of the automated control and measurement system is justified from the point of view of completeness and reliability of the obtained data. © 2021 Institute of Physics Publishing. All rights reserved.},
note = {cited By 0},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
The paper presents the results of the development and creation of an automated system of scientific research (ASSR). It provides experimental studies of heat and mass transfer processes in a hydrogen-oxygen steam generator (HOSG). The most relevant fields of application of hydrogen-oxygen steam generators are considered. The paper discusses the most relevant areas of application of hydrogen-oxygen steam generators, scientific and technical barriers to the introduction of technology and the features of the construction of ASSR for experimental research. The schematic diagram of the primary measuring transducers and the control mechanisms of the experimental stand are described. The choice of the configuration of the automated control and measurement system is justified from the point of view of completeness and reliability of the obtained data. © 2021 Institute of Physics Publishing. All rights reserved.
11.
Chukhin, N. I.; Schastlivtsev, A. I.
Experimental investigations of the processes in gas generator of hydrogen-air energy storage Conference
vol. 2039, no. 1, 2021, (cited By 0).
@conference{Chukhin2021,
title = {Experimental investigations of the processes in gas generator of hydrogen-air energy storage},
author = {N. I. Chukhin and A. I. Schastlivtsev},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85119675034&doi=10.1088%2f1742-6596%2f2039%2f1%2f012007&partnerID=40&md5=3cb8863eaa0f09a60a3ab63ca5a484b2},
doi = {10.1088/1742-6596/2039/1/012007},
year = {2021},
date = {2021-01-01},
journal = {Journal of Physics: Conference Series},
volume = {2039},
number = {1},
abstract = {This paper describes the results of experimental investigation of the sample of the hydrogen-air gas generator unit with the expected average power of 65 kW. In total 5 test runs were made. Two tests showed that the mass flow and outlet gas temperature was in an agreement with the designed parameters. Additional attention should be paid to the cooling system design for the combustion chamber. In future such a gas generator in couple with the suitable gas turbine unit could be a part of the renewable energy accumulation system e.g. of hydrogen-air energy storage. © 2021 Institute of Physics Publishing. All rights reserved.},
note = {cited By 0},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
This paper describes the results of experimental investigation of the sample of the hydrogen-air gas generator unit with the expected average power of 65 kW. In total 5 test runs were made. Two tests showed that the mass flow and outlet gas temperature was in an agreement with the designed parameters. Additional attention should be paid to the cooling system design for the combustion chamber. In future such a gas generator in couple with the suitable gas turbine unit could be a part of the renewable energy accumulation system e.g. of hydrogen-air energy storage. © 2021 Institute of Physics Publishing. All rights reserved.
12.
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.
13.
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.
14.
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.
15.
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.
16.
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.
17.
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.
18.
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
19.
Schastlivtsev, A. I.; Borzenko, V. I.; Shmatov, D. P.
vol. 1652, no. 1, 2020, (cited By 1).
@conference{Schastlivtsev2020,
title = {Minimization of hydrogen concentration in the superheated mixture at steam turbine working fluid overheating by mixing with higherature products of hydrogen in oxygen combustion at nuclear power plant},
author = {A. I. Schastlivtsev and V. I. Borzenko and D. P. Shmatov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85096659258&doi=10.1088%2f1742-6596%2f1652%2f1%2f012040&partnerID=40&md5=3ef5ac7b2a533bf8dc43467f748b35af},
doi = {10.1088/1742-6596/1652/1/012040},
year = {2020},
date = {2020-01-01},
journal = {Journal of Physics: Conference Series},
volume = {1652},
number = {1},
abstract = {A new design of hydrogen-oxygen superheater with hybrid cooling of the combustion chamber with feed water and lowerature steam is proposed for smoothening the cooling process in order to reduce the residual hydrogen content in the process steam. The combustion chamber at this design consists of two parts. In the first part, external cooling with feed water is used for smooth cooling of combustion products to 1900 ... 2100 K in the most thermally stressed zone. In the second part, lowerature steam is used as coolant for external cooling, the temperature of the generated higherature steam is reduced down to 1400 ... 1500 K. Finally, the obtained higherature steam is mixed with the working fluid. © Published under licence by IOP Publishing Ltd.},
note = {cited By 1},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
A new design of hydrogen-oxygen superheater with hybrid cooling of the combustion chamber with feed water and lowerature steam is proposed for smoothening the cooling process in order to reduce the residual hydrogen content in the process steam. The combustion chamber at this design consists of two parts. In the first part, external cooling with feed water is used for smooth cooling of combustion products to 1900 ... 2100 K in the most thermally stressed zone. In the second part, lowerature steam is used as coolant for external cooling, the temperature of the generated higherature steam is reduced down to 1400 ... 1500 K. Finally, the obtained higherature steam is mixed with the working fluid. © Published under licence by IOP Publishing Ltd.
20.
Romanov, I. A.; Borzenko, V. I.; Kazakov, A. N.
Enhancing metal hydride thermal conductivity by forming compacts Conference
vol. 1675, no. 1, 2020, (cited By 1).
@conference{Romanov2020,
title = {Enhancing metal hydride thermal conductivity by forming compacts},
author = {I. A. Romanov and V. I. Borzenko and A. N. Kazakov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85098187494&doi=10.1088%2f1742-6596%2f1675%2f1%2f012095&partnerID=40&md5=12db2dfb8f0cd73d9f00dbf823f49101},
doi = {10.1088/1742-6596/1675/1/012095},
year = {2020},
date = {2020-01-01},
journal = {Journal of Physics: Conference Series},
volume = {1675},
number = {1},
abstract = {The development and implementation of metal hydride technologies face a number of challenges. One of the main problems is the low thermal conductivity of fine powders of hydride-forming materials. This feature, giving the relatively high values of the reaction heat of intermetallic compounds with hydrogen, leads to an increase in the cost of construction of vessels with metal hydrides and heat exchangers, which reduces the competitiveness of hydrogen-based technologies. One of the most promising ways to solve this problem today is the formation of compacts from metal hydride powders by pressing with additives that increase thermal conductivity. In this work, compacts based on AB5-type alloy with composition LaNi4.4Al0.3Fe0.3 prepared using various methods were studied and their properties were compared with the free bed of this alloy. Carbon nanofibers and nickel-foam were used as additives that improve the thermal conductivity of the compacts. The main methods of studying the properties of samples were measuring of hydrogen absorption and desorption PCT-isotherms and investigation of the temperature inside the samples during their heating and interaction with hydrogen. The compacts showed a noticeable improvement in thermal conductivity with a slight deterioration in hydrogen-adsorption properties, which is a promising result. © Published under licence by IOP Publishing Ltd.},
note = {cited By 1},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
The development and implementation of metal hydride technologies face a number of challenges. One of the main problems is the low thermal conductivity of fine powders of hydride-forming materials. This feature, giving the relatively high values of the reaction heat of intermetallic compounds with hydrogen, leads to an increase in the cost of construction of vessels with metal hydrides and heat exchangers, which reduces the competitiveness of hydrogen-based technologies. One of the most promising ways to solve this problem today is the formation of compacts from metal hydride powders by pressing with additives that increase thermal conductivity. In this work, compacts based on AB5-type alloy with composition LaNi4.4Al0.3Fe0.3 prepared using various methods were studied and their properties were compared with the free bed of this alloy. Carbon nanofibers and nickel-foam were used as additives that improve the thermal conductivity of the compacts. The main methods of studying the properties of samples were measuring of hydrogen absorption and desorption PCT-isotherms and investigation of the temperature inside the samples during their heating and interaction with hydrogen. The compacts showed a noticeable improvement in thermal conductivity with a slight deterioration in hydrogen-adsorption properties, which is a promising result. © Published under licence by IOP Publishing Ltd.