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http://dx.doi.org/10.12925/jkocs.2011.28.1.9

The performance of PEMFC after hydrogen sulfide poisoning under various operating conditions  

Lee, Soo (Department of Chemical Engineering, Changwon National University)
Jin, Seok-Hwan (Department of Chemical Engineering, Changwon National University)
Kim, Sang-Myoung (Department of Chemical Engineering, Changwon National University)
Publication Information
Journal of the Korean Applied Science and Technology / v.28, no.1, 2011 , pp. 57-63 More about this Journal
Abstract
Polymer electrolyte membrane fuel cell (PEMFC) performance degrades when hydrogen sulfide ($H_2S$) is present in the fuel hydrogen gas; this is referred to as $H_2S$ poisoning. This paper reveals $H_2S$ poisoning on PEMFC by measuring electrical performance of single cell FC under various operating conditions. The severity of $H_2S$ poisoning depended on $H_2S$ concentration under best operating conditions($65^{\circ}C$ of cell temperature and 100% of anode humidification). $H_2S$ adsorption occured on the surface of catalyst layer on MEA, but not on the gas diffusion layer(GDL) by analyzing SEM/EDX data. In addition, MEA poisoning by $H_2S$ was cumulative but reversible. After poisoning for less than 150 min, performance of PEMFC was recovered up to 80% by just inert nitrogen gas purging.
Keywords
PEMFC; $H_2S$; poisoning; Gore MEA; GDL;
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Times Cited By KSCI : 1  (Citation Analysis)
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