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http://dx.doi.org/10.9713/kcer.2017.55.1.107

H2S Poisoning Effect and Recovery Methods of Polymer Electrolyte Membrane Fuel Cell  

Chun, Byungdo (School of Chemical Engineering, University of Ulsan)
Kim, Junbom (School of Chemical Engineering, University of Ulsan)
Publication Information
Korean Chemical Engineering Research / v.55, no.1, 2017 , pp. 107-114 More about this Journal
Abstract
The performance of polymer electrolyte membrane fuel cell (PEMFC) could be deteriorated when fuel contains contaminants such as carbon monoxide (CO) or hydrogen sulfide ($H_2S$). Generally, $H_2S$ is introduced in hydrogen by steam reforming of hydrocarbon which has mercaptan as odorant. $H_2S$ poisoning effect on PEMFC performance was examined on this study. Pure hydrogen injection, voltage cycling and water circulation methods were compared as performance recovery methods. The PEMFC performance was analyzed using electrochemical methods such as polarization curve, electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). Pure hydrogen injection and voltage cycling methods showed low recovery ratio, however, water circulation method showed high recovery ratio over 95%. Because anode was directly poisoned by $H_2S$, anode water circulation showed higher recovery ratio compared to the other methods. Water circulation method was developed to recover PEMFC performance from $H_2S$ poisoning. This method could contribute to PEMFC durability and commercialization.
Keywords
Polymer electrolyte membrane fuel cell; Hydrogen sulfide; Poisoning; Recovery;
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Times Cited By KSCI : 4  (Citation Analysis)
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