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Performance Analysis of Off-Gas/Syngas Combustor for Thermal Management of High Temperature Fuel Cell System  

Lee, Sang-Min (Korea Institute of Machinery & Materials)
Lee, Youn-Hwa (Korea Institute of Machinery & Materials)
Ahn, Kook-Young (Korea Institute of Machinery & Materials)
Yu, Sang-Seok (Department of Mechanical Engineering, Chung Nam Univ.)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.21, no.3, 2010 , pp. 193-200 More about this Journal
Abstract
Anode off-gas of high temperature fuel cell still contains combustible components such as hydrogen, carbon monoxide and hydrocarbon. In this study, a catalytic combustor has been applied to the high temperature fuel cell so that the combustion of anode-off gas can be boosted up. Since the performance of catalytic combustor directly depends on the combustion catalyst, this study is designed to perform the experimental investigation on the combustion characteristics of the three commercial catalysts with a different composition. Screening tests with three catalysts are preceded before the performance examination since it is necessary to determine the most suitable catalyst for design configuration of the catalytic combustor. The performance analysis shows that methane conversion rate strongly depends on gas hourly space velocity (GHSV) as well as inlet gas temperature. Additionally, the GSHV optimization results show that the optimum GHSV will be in the range between 18,000 $hr^{-1}$ and 36,000 $hr^{-1}$. It is also shown that the minimum inlet temperature of catalytic reaction of methane is from $100^{\circ}C$ to $150^{\circ}C$.
Keywords
Catalytic combustion; Syngas combustor; High temperature stationary fuel cell; Selection of catalyst;
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Times Cited By KSCI : 2  (Citation Analysis)
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