The Experts below are selected from a list of 1605 Experts worldwide ranked by ideXlab platform
Wei Zhou - One of the best experts on this subject based on the ideXlab platform.
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A steel slag–derived Boudouard Reaction catalyst for improved performance of direct carbon solid oxide fuel cells
International Journal of Energy Research, 2019Co-Authors: Yong Jiao, Chongyang Wang, Liqin Zhang, Na Zhou, Guangming Yang, Wei Wang, Wei ZhouAbstract:Solid oxide fuel cells (SOFCs) can directly utilize solid carbon as fuel by integrating with the reverse Boudouard Reaction in the anode chamber. Efficiency of the Boudouard gasification of solid carbon fuel is one of the crucial factors influencing the performance of direct carbon SOFCs (DC-SOFCs). In this paper, a novel Boudouard Reaction catalyst derived from steel slag was first introduced into DC-SOFCs for improving the electrochemical performance. The catalytic activity of the steel slag was activated using the molten alkali method to decompose the inert mineral phases of the raw material. The steel slag–derived catalyst was loaded on the activated charcoal by a wet ball milling method. This kind of catalyst can match up to the readily available solid carbon fuels in cost. Promoted by this highly active Boudouard Reaction catalyst, the initial Boudouard gasification temperature of the carbon fuel decreased by 99°C, and the producing rate of carbon monoxide doubled. Furthermore, the power outputs of the fuel cells increased from 91 to 159 mW cm, and the fuel utilization increased from 17.10% to 46.43% at 825°C. This study demonstrates that the steel slag–derived catalyst is a promising material for the performance improvement of DC-SOFCs and may make a valuable contribution to their commercial application.
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a steel slag derived Boudouard Reaction catalyst for improved performance of direct carbon solid oxide fuel cells
International Journal of Energy Research, 2019Co-Authors: Yong Jiao, Chongyang Wang, Liqin Zhang, Na Zhou, Guangming Yang, Wei Wang, Wei ZhouAbstract:Solid oxide fuel cells (SOFCs) can directly utilize solid carbon as fuel by integrating with the reverse Boudouard Reaction in the anode chamber. Efficiency of the Boudouard gasification of solid carbon fuel is one of the crucial factors influencing the performance of direct carbon SOFCs (DC-SOFCs). In this paper, a novel Boudouard Reaction catalyst derived from steel slag was first introduced into DC-SOFCs for improving the electrochemical performance. The catalytic activity of the steel slag was activated using the molten alkali method to decompose the inert mineral phases of the raw material. The steel slag–derived catalyst was loaded on the activated charcoal by a wet ball milling method. This kind of catalyst can match up to the readily available solid carbon fuels in cost. Promoted by this highly active Boudouard Reaction catalyst, the initial Boudouard gasification temperature of the carbon fuel decreased by 99°C, and the producing rate of carbon monoxide doubled. Furthermore, the power outputs of the fuel cells increased from 91 to 159 mW cm, and the fuel utilization increased from 17.10% to 46.43% at 825°C. This study demonstrates that the steel slag–derived catalyst is a promising material for the performance improvement of DC-SOFCs and may make a valuable contribution to their commercial application.
Marcelo M. Pereira - One of the best experts on this subject based on the ideXlab platform.
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Catalyst regeneration using CO2 as reactant through reverse‐Boudouard Reaction with coke
Greenhouse Gases: Science and Technology, 2017Co-Authors: Sérgio Castro Pereira, M. Filipa Ribeiro, Nuno Batalha, Marcelo M. PereiraAbstract:The possibility of CO 2 recycling into standard refinery can largely mitigate greenhouse gas emissions. It was previously demonstrated that alumina modified by either potassium or lithium in the presence of vanadium was able to promote the Reaction of CO 2 with coke in the presence of O 2 during the regeneration step of a spent catalyst. Herein, vanadium‐sodium and vanadium‐calcium on alumina were used to achieve that Reaction. These catalysts showed slightly lower conversion compared to previously catalysts. However, regardless of the type of group I and II elements, all catalysts showed very similar apparent activation energy (Ea app ) for the coke oxidation with CO 2 Reaction ( C O 2 + c o k e t o 2.6 p c → E a a p p C O + c o k e − O ), i.e., in the range of 188–193 kJ.mol-super-−1. In contrast without vanadium, Ea app was in the range of 242–253 kJ.mol-super-−1. Therefore, CO 2 is activated in a site composed of V‐O‐(group I or II) in the coke proximity. Moreover, these results clearly support that vanadium plays the main role in the type of activation complex, independently of the group I and II metal used and most probably in the dissociative step of CO 2 . © 2017 Society of Chemical Industry and John Wiley & Sons, Ltd.
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catalyst regeneration using co2 as reactant through reverse Boudouard Reaction with coke
Greenhouse Gases-Science and Technology, 2017Co-Authors: Sérgio Castro Pereira, Nuno Batalha, Marcelo M. Pereira, Filipa M RibeiroAbstract:The possibility of CO 2 recycling into standard refinery can largely mitigate greenhouse gas emissions. It was previously demonstrated that alumina modified by either potassium or lithium in the presence of vanadium was able to promote the Reaction of CO 2 with coke in the presence of O 2 during the regeneration step of a spent catalyst. Herein, vanadium‐sodium and vanadium‐calcium on alumina were used to achieve that Reaction. These catalysts showed slightly lower conversion compared to previously catalysts. However, regardless of the type of group I and II elements, all catalysts showed very similar apparent activation energy (Ea app ) for the coke oxidation with CO 2 Reaction ( C O 2 + c o k e t o 2.6 p c → E a a p p C O + c o k e − O ), i.e., in the range of 188–193 kJ.mol-super-−1. In contrast without vanadium, Ea app was in the range of 242–253 kJ.mol-super-−1. Therefore, CO 2 is activated in a site composed of V‐O‐(group I or II) in the coke proximity. Moreover, these results clearly support that vanadium plays the main role in the type of activation complex, independently of the group I and II metal used and most probably in the dissociative step of CO 2 . © 2017 Society of Chemical Industry and John Wiley & Sons, Ltd.
Sérgio Castro Pereira - One of the best experts on this subject based on the ideXlab platform.
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Catalyst regeneration using CO2 as reactant through reverse‐Boudouard Reaction with coke
Greenhouse Gases: Science and Technology, 2017Co-Authors: Sérgio Castro Pereira, M. Filipa Ribeiro, Nuno Batalha, Marcelo M. PereiraAbstract:The possibility of CO 2 recycling into standard refinery can largely mitigate greenhouse gas emissions. It was previously demonstrated that alumina modified by either potassium or lithium in the presence of vanadium was able to promote the Reaction of CO 2 with coke in the presence of O 2 during the regeneration step of a spent catalyst. Herein, vanadium‐sodium and vanadium‐calcium on alumina were used to achieve that Reaction. These catalysts showed slightly lower conversion compared to previously catalysts. However, regardless of the type of group I and II elements, all catalysts showed very similar apparent activation energy (Ea app ) for the coke oxidation with CO 2 Reaction ( C O 2 + c o k e t o 2.6 p c → E a a p p C O + c o k e − O ), i.e., in the range of 188–193 kJ.mol-super-−1. In contrast without vanadium, Ea app was in the range of 242–253 kJ.mol-super-−1. Therefore, CO 2 is activated in a site composed of V‐O‐(group I or II) in the coke proximity. Moreover, these results clearly support that vanadium plays the main role in the type of activation complex, independently of the group I and II metal used and most probably in the dissociative step of CO 2 . © 2017 Society of Chemical Industry and John Wiley & Sons, Ltd.
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catalyst regeneration using co2 as reactant through reverse Boudouard Reaction with coke
Greenhouse Gases-Science and Technology, 2017Co-Authors: Sérgio Castro Pereira, Nuno Batalha, Marcelo M. Pereira, Filipa M RibeiroAbstract:The possibility of CO 2 recycling into standard refinery can largely mitigate greenhouse gas emissions. It was previously demonstrated that alumina modified by either potassium or lithium in the presence of vanadium was able to promote the Reaction of CO 2 with coke in the presence of O 2 during the regeneration step of a spent catalyst. Herein, vanadium‐sodium and vanadium‐calcium on alumina were used to achieve that Reaction. These catalysts showed slightly lower conversion compared to previously catalysts. However, regardless of the type of group I and II elements, all catalysts showed very similar apparent activation energy (Ea app ) for the coke oxidation with CO 2 Reaction ( C O 2 + c o k e t o 2.6 p c → E a a p p C O + c o k e − O ), i.e., in the range of 188–193 kJ.mol-super-−1. In contrast without vanadium, Ea app was in the range of 242–253 kJ.mol-super-−1. Therefore, CO 2 is activated in a site composed of V‐O‐(group I or II) in the coke proximity. Moreover, these results clearly support that vanadium plays the main role in the type of activation complex, independently of the group I and II metal used and most probably in the dissociative step of CO 2 . © 2017 Society of Chemical Industry and John Wiley & Sons, Ltd.
Yutaka Tamaura - One of the best experts on this subject based on the ideXlab platform.
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Coal/CO2 Gasification System Using Molten Carbonate Salt for Solar/Fossil Energy Hybridization
Energy & Fuels, 1999Co-Authors: S. Yoshida, Jun Matsunami, Y Hosokawa, Osamu Yokota, Yutaka Tamaura, Mitsunobu KitamuraAbstract:The gasification of active carbon and coal with CO2 (the Boudouard Reaction: C + CO2 = 2CO) was studied using a molten salt (the mixture of K2CO3 and Na2CO3) at 1123 K to apply this system to solar energy conversion into chemical energy. On the solar/chemical energy hybridization system to obtain CH3OH as a solar fuel, the coal with molten salt can directly gasify by the Boudouard Reaction. The gasification Reaction rate of active carbon and coal with CO2 into CO was enhanced by 1.5 and 3.3 times in the presence of the molten salt, respectively, compared with the absence of the molten salt. The coal gasification using molten salt was suggested to have two steps: the first step is coke production by the coal pyrolysis, and the second step is the Boudouard Reaction by the catalytic effect of the alkali metal cations (K+ and Na+).
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Solar/chemical energy hybridization via Boudouard Reaction
Studies in Surface Science and Catalysis, 1998Co-Authors: H. Ono, M. Kawabe, M. Nezuka, Masamichi Tsuji, Yutaka TamauraAbstract:A solar thermochemical energy hybridization system for stating-up the global carbon recycling energy delivery system (GCRED-system) was studied. It involves a solar thermochemical methane decomposition and Boudouard Reaction. In this hybridization system, natural gas is decomposed into carbon and H2, and 3/5 of the carbon is converted solar-thermochemically into CO using the Boudouard Reaction. Half of the CO2 recovered from energy consuming site will be recycled. CO2 emissions can be reduced to 60% on the same calorific heat basis at energy consumption site.
Yong Jiao - One of the best experts on this subject based on the ideXlab platform.
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A steel slag–derived Boudouard Reaction catalyst for improved performance of direct carbon solid oxide fuel cells
International Journal of Energy Research, 2019Co-Authors: Yong Jiao, Chongyang Wang, Liqin Zhang, Na Zhou, Guangming Yang, Wei Wang, Wei ZhouAbstract:Solid oxide fuel cells (SOFCs) can directly utilize solid carbon as fuel by integrating with the reverse Boudouard Reaction in the anode chamber. Efficiency of the Boudouard gasification of solid carbon fuel is one of the crucial factors influencing the performance of direct carbon SOFCs (DC-SOFCs). In this paper, a novel Boudouard Reaction catalyst derived from steel slag was first introduced into DC-SOFCs for improving the electrochemical performance. The catalytic activity of the steel slag was activated using the molten alkali method to decompose the inert mineral phases of the raw material. The steel slag–derived catalyst was loaded on the activated charcoal by a wet ball milling method. This kind of catalyst can match up to the readily available solid carbon fuels in cost. Promoted by this highly active Boudouard Reaction catalyst, the initial Boudouard gasification temperature of the carbon fuel decreased by 99°C, and the producing rate of carbon monoxide doubled. Furthermore, the power outputs of the fuel cells increased from 91 to 159 mW cm, and the fuel utilization increased from 17.10% to 46.43% at 825°C. This study demonstrates that the steel slag–derived catalyst is a promising material for the performance improvement of DC-SOFCs and may make a valuable contribution to their commercial application.
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a steel slag derived Boudouard Reaction catalyst for improved performance of direct carbon solid oxide fuel cells
International Journal of Energy Research, 2019Co-Authors: Yong Jiao, Chongyang Wang, Liqin Zhang, Na Zhou, Guangming Yang, Wei Wang, Wei ZhouAbstract:Solid oxide fuel cells (SOFCs) can directly utilize solid carbon as fuel by integrating with the reverse Boudouard Reaction in the anode chamber. Efficiency of the Boudouard gasification of solid carbon fuel is one of the crucial factors influencing the performance of direct carbon SOFCs (DC-SOFCs). In this paper, a novel Boudouard Reaction catalyst derived from steel slag was first introduced into DC-SOFCs for improving the electrochemical performance. The catalytic activity of the steel slag was activated using the molten alkali method to decompose the inert mineral phases of the raw material. The steel slag–derived catalyst was loaded on the activated charcoal by a wet ball milling method. This kind of catalyst can match up to the readily available solid carbon fuels in cost. Promoted by this highly active Boudouard Reaction catalyst, the initial Boudouard gasification temperature of the carbon fuel decreased by 99°C, and the producing rate of carbon monoxide doubled. Furthermore, the power outputs of the fuel cells increased from 91 to 159 mW cm, and the fuel utilization increased from 17.10% to 46.43% at 825°C. This study demonstrates that the steel slag–derived catalyst is a promising material for the performance improvement of DC-SOFCs and may make a valuable contribution to their commercial application.