Journal
ENERGY CONVERSION AND MANAGEMENT
Volume 148, Issue -, Pages 701-707Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.enconman.2017.06.039
Keywords
Flame fuel cell; Biogas; Porous media combustion; Carbon deposition; Combined heat and power
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Funding
- National Natural Science Foundation of China [51576112]
- National Basic Research Program of China (973 Program) [2014CB249201]
- Beijing Higher Education Young Elite Teacher Project
- Tsinghua University 221 Fundamental Research Program
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A biogas-fueled flame fuel cell (FFC) unit is proposed for the micro-combined heat and power (CHP) system using indigenous energy source. With fuel-rich flame as both heater and reformer, FFC is advantageous for quick start-up, no sealing, and simple thermal management. In this study, a porous media burner with non-catalytic fuel-rich combustion was utilized to provide both stable high temperature environment and reformed syngas for the solid oxide fuel cell (SOFC). The porous media burner and a micro-tubular SOFC were integrated directly in the biogas FFC reactor. The performance of fuel-rich combustion and electrochemical characteristic was studied for various equivalence ratios from 1.2 to 1.4. Experimental results showed that the reforming efficiency reached 423% with the porous media burner, using model biogas of 60% CH4 and 40% CO2 as fuel. The maximum power for a single tubular fuel cell reached 1.4 W when fed with model biogas at an equivalence ratio of 1.4. Furthermore, performance degradation caused by carbon deposition at the anode was investigated. (C) 2017 Elsevier Ltd. All rights reserved.
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