Publication: Performance and environmental study of a biogas-fuelled solid oxide fuel cell with different reforming approaches
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Issued Date
2018
Resource Type
File Type
application/pdf
ISSN
3605442
Other identifier(s)
2-s2.0-85021350626
Rights Holder(s)
Scopus
Bibliographic Citation
Energy. Vol 146, (2018), p.131-140
Suggested Citation
Chatrattanawet N., Saebea D., Authayanun S., Arpornwichanop A., Patcharavorachot Y. Performance and environmental study of a biogas-fuelled solid oxide fuel cell with different reforming approaches. Energy. Vol 146, (2018), p.131-140. doi:10.1016/j.energy.2017.06.125 Retrieved from: https://hdl.handle.net/20.500.14740/3691
Abstract
In this work, solid oxide fuel cells (SOFCs) using biogas as the fuel with two different reforming approaches, i.e., external and internal reforming, were studied to determine the optimal operation conditions for each approach. Thermodynamic analysis was performed using a flowsheet simulator. The equilibrium gas composition was calculated by minimizing the Gibbs free energy. An electrochemical model that includes three voltage losses (i.e., activation, ohmic, and concentration losses) was used to predict the performance of the SOFCs. The simulation results showed that the reformer in the external reforming SOFC should be operated at a temperature of 973 K, a pressure of 1 atm, and a steam-to-carbon molar ratio of 0.5. In performance analysis, the simulation results indicated that both approaches have the same optimal operating conditions, i.e. a temperature of 1173 K, a pressure of 3 atm, and a current density of 5000 A/m2. Under the same operating conditions, the internal reforming SOFC exhibited better electrical efficiency than that of the external reforming SOFC. Considering the CO2 and CO emissions, the exhaust gas obtained from the anode side of the internal reforming SOFC contained 7.4% CO2 and 37.9% CO, which are higher values than those for the external reforming SOFC (1.9% CO2 and 32.5% CO). © 2017 Elsevier Ltd
Subject(s)
Biogas
Carbon
Carbon dioxide
Exhaust gases
Fuel cells
Gas emissions
Reforming reactions
Steam reforming
Thermoanalysis
Thermodynamic properties
Electrical efficiency
Electrochemical modeling
Environmental studies
Internal reforming sofc
Optimal operating conditions
Optimal operation conditions
Solid oxide fuel cells (SOFCs)
Thermo dynamic analysis
Solid oxide fuel cells (SOFC)
Biogas
Electrochemical method
Energy efficiency
Fuel cell
Gibbs free energy
Operations technology
Performance assessment
Solid
Thermodynamics
Carbon
Carbon dioxide
Exhaust gases
Fuel cells
Gas emissions
Reforming reactions
Steam reforming
Thermoanalysis
Thermodynamic properties
Electrical efficiency
Electrochemical modeling
Environmental studies
Internal reforming sofc
Optimal operating conditions
Optimal operation conditions
Solid oxide fuel cells (SOFCs)
Thermo dynamic analysis
Solid oxide fuel cells (SOFC)
Biogas
Electrochemical method
Energy efficiency
Fuel cell
Gibbs free energy
Operations technology
Performance assessment
Solid
Thermodynamics