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Syngas CO cleaning for fuel cell applications by preferential oxidation: catalyst development and reactor design

Author

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  • Donglai Xie
  • Erato Zhang
  • Ruijun Li
  • Yajun Zhang

Abstract

Proton exchange membrane fuel cells are widely employed in micro-combined heat and power cogeneration (micro-CHP) systems and the feed to them should be essentially free of CO. CO preferential oxidation is an effective method for deeply removal of the CO content in synthesis gas. A series of Pt/γ-Al2O3 catalysts are made and tested for their CO cleaning capabilities. The catalyst is prepared from chloroplatinic acid and γ-Al2O3 powder by normal or ultrasonic impregnation. Catalyst performance is investigated in a micro-reactor system. Effects of Pt loading, ultrasonic processing, CO space velocity, oxygen to CO ratio and reaction temperature on catalyst performance are studied. A CO preferential reactor for a kilowatt-scale CHP system is designed and tested. A special catalyst loading pattern is tried to maintain a uniform bed temperature distribution and high CO conversion. A CO concentration of <10 ppm is achieved when the CO concentration in the gas feed is 0.45%.

Suggested Citation

  • Donglai Xie & Erato Zhang & Ruijun Li & Yajun Zhang, 2014. "Syngas CO cleaning for fuel cell applications by preferential oxidation: catalyst development and reactor design," International Journal of Low-Carbon Technologies, Oxford University Press, vol. 9(1), pages 63-70.
    • Handle: RePEc:oup:ijlctc:v:9:y:2014:i:1:p:63-70.
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    File URL: http://hdl.handle.net/10.1093/ijlct/cts056
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