TY - JOUR
T1 - Modeling of direct carbon solid oxide fuel cells with H2O and CO2 as gasification agents
AU - Xu, Haoran
AU - Chen, Bin
AU - Zhang, Houcheng
AU - Sun, Qiong
AU - Yang, Guangming
AU - Ni, Meng
N1 - Publisher Copyright:
© 2017 Hydrogen Energy Publications LLC
PY - 2017/6/8
Y1 - 2017/6/8
N2 - 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.
AB - 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.
KW - Mathematical modeling
KW - Solid oxide fuel cell (SOFC)
KW - Steam gasification of carbon
UR - http://www.scopus.com/inward/record.url?scp=85019663399&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2017.05.075
DO - 10.1016/j.ijhydene.2017.05.075
M3 - 文章
AN - SCOPUS:85019663399
SN - 0360-3199
VL - 42
SP - 15641
EP - 15651
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 23
ER -
