Carbon formation in solid oxide fuel cells during internal reforming and anode off-gas recirculation

Tsai, Tsang-I (2016). Carbon formation in solid oxide fuel cells during internal reforming and anode off-gas recirculation. University of Birmingham. Ph.D.

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Abstract

This aim of this work is to determine carbon formation when methane is reformed directly inside the SOFC anodes, from thermodynamic equilibrium and kinetic approaches. Two carbon formation determination approaches - carbon-steam equilibrium and carbon activity approaches were then presented, compared and discussed. The consideration of the reversed syngas formation reaction is important to the carbon activity approach, which is expected to be a useful tool for determining carbon formation in the anode recirculation system.
The investigation of the combined steam and dry methane reforming, both thermodynamic equilibrium computational modelling approach and kinetic experimental validation were presented in this work. Different ratios among methane, steam and carbon dioxide, leading to different oxygen to carbon atomic were used to examine the methane reforming and the carbon formation prevention abilities.
Finally, a kinetic modelling for a methane fed SOFC with anode recirculation system was built based on the integration of different functions for a more detailed investigation. The combination of different fuel current densities (i.e.0.5, 1.0 and 1.4), steam to methane ratios (i.e. 0.25-4.0) in the fuel and different recycling rate (i.e.10%-90%) were given to the model to investigate the effects of fuel conditions on the system operation.

Type of Work: Thesis (Doctorates > Ph.D.)
Award Type: Doctorates > Ph.D.
Supervisor(s):
Supervisor(s)EmailORCID
Steinberger-Wilckens, RobertUNSPECIFIEDUNSPECIFIED
Kendall, KevinUNSPECIFIEDUNSPECIFIED
Pollet, Bruno GUNSPECIFIEDUNSPECIFIED
Robbins, PhilUNSPECIFIEDUNSPECIFIED
Bujalski, WaldemarUNSPECIFIEDUNSPECIFIED
Dhir, AmanUNSPECIFIEDUNSPECIFIED
Licence:
College/Faculty: Colleges (2008 onwards) > College of Engineering & Physical Sciences
School or Department: School of Chemical Engineering
Funders: None/not applicable
Subjects: T Technology > TP Chemical technology
URI: http://etheses.bham.ac.uk/id/eprint/6199

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