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Environmental Engineering Research 2008;13(4): 192-196. DOI: https://doi.org/10.4491/eer.2008.13.4.192
Improved Reduction of Carbon Monoxide by Highly Efficient Catalytic Shift for Fuel Cell Applications
M. J. Youn, and Y. N. Chun
BK21 Team for Hydrogen Production·Department of Environmental Engineering, Chosun University, #375 Seosuk-dong, Dong-gu, Gwang-ju, 501-759 R. Korea
Corresponding Author: Y. N. Chun ,Tel: +82-62-230-7156, Fax: +82-62-230-7156, Email: ynchun@chosun.ac.kr
Received: June 8, 2008;  Accepted: October 9, 2008.
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ABSTRACT
The generation of high purity hydrogen from reformed hydrocarbon fuels, or syngas, is essential for efficient operation of the fuel cell (PEMFC, Polymer Electrolyte Membrane Fuel Cell). Usually, major components of reformed gas are H2, CO, CO2 and H2O. Especially a major component, CO poisons the electrode of fuel cells. The water gas shifter (WGS) that shifts CO to CO2 and simultaneously produces H2, was developed to a two stage catalytic conversion process involving a high temperature shifter (HTS) and a low temperature shifter (LTS). Also, experiments were carried out to reduce the carbon monoxide up to 3~4% in the HTS and lower than 5,000 ppm via the LTS.
Keywords: Hydrogen | Carbon monoxide | WGS | HTS | LTS
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