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http://hdl.handle.net/10397/95905
Title: | Modeling of direct carbon solid oxide fuel cells with H2O and CO2 as gasification agents | Authors: | Xu, H Chen, B Zhang, H Sun, Q Yang, G Ni, M |
Issue Date: | 8-Jun-2017 | Source: | International journal of hydrogen energy, 8 June 2017, v. 42, no. 23, p. 15641-15651 | Abstract: | In this paper, 2D models for direct carbon solid oxide fuel cells (DC-SOFCs) with H2O and CO2 as agents for carbon gasification are developed. The simulation results are compared with experimental data and good agreement is obtained. The performance of DC-SOFCs with two agents is compared at different operating potential, temperature and anode inlet gas flow rate. It is found that the H2O assisted DC-SOFC performs significantly better than the CO2-assisted DC-SOFC, indicating the suitability of H2O for DC-SOFCs. It is also found that a higher temperature could greatly improve the performance of both kinds of DC-SOFCs. At a temperature of 1000 K and operating voltage of 0.5 V, the current density from the CO2-assisted DC-SOFC is close to 0 while it is still above 1000 A m−2 from the H2O-assisted DC-SOFC, indicating the possibility of operating the H2O assisted DC-SOFC at reduced temperature. It is found that the anode gas flow rate does not significantly affect the performance of DC-SOFC. To further improve the performance of H2O assisted DC-SOFCs, developing suitable catalysts for enhancing carbon gasification kinetics could be a good strategy. The results of this study form a solid foundation to understand H2O assisted DC-SOFCs. | Keywords: | Mathematical modeling Solid oxide fuel cell (SOFC) Steam gasification of carbon |
Publisher: | Pergamon Press | Journal: | International journal of hydrogen energy | ISSN: | 0360-3199 | EISSN: | 1879-3487 | DOI: | 10.1016/j.ijhydene.2017.05.075 | Rights: | © 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/ The following publication Xu, H., Chen, B., Zhang, H., Sun, Q., Yang, G., & Ni, M. (2017). Modeling of direct carbon solid oxide fuel cells with H2O and CO2 as gasification agents. International Journal of Hydrogen Energy, 42(23), 15641-15651 is available at https://doi.org/10.1016/j.ijhydene.2017.05.075. |
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