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Research Papers

Effect of Humidity on Carbon Monoxide Desorption Kinetics

[+] Author and Article Information
F. Dundar

Institute for Energy and Transport,
Joint Research Centre,
European Commission,
Postbus 2,
Petten 1755 ZG, Netherlands;
Department of Mechanical Engineering,
Meliksah University,
Kayseri 38280, Turkey
e-mail: fdundar@meliksah.edu.tr

A. Pitois, A. Pilenga, G. Tsotridis

Institute for Energy and Transport,
Joint Research Centre,
European Commission,
Postbus 2,
Petten 1755 ZG, Netherlands

1Current address: Department of Mechanical Engineering, Meliksah University, Talas Kayseri.

Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF FUEL CELL SCIENCE AND TECHNOLOGY. Manuscript received April 15, 2013; final manuscript received February 20, 2014; published online April 17, 2014. Assoc. Editor: Abel Hernandez-Guerrero.

J. Fuel Cell Sci. Technol 11(4), 041008 (Apr 17, 2014) (5 pages) Paper No: FC-13-1035; doi: 10.1115/1.4027185 History: Received April 15, 2013; Revised February 20, 2014

The kinetics of carbon monoxide desorption on a platinum catalyst under humidified conditions were investigated with the steady state isotropic transient kinetic analysis (SSITKA) method. The effect of the humidity level on desorption kinetics was quantified. The carbon monoxide (CO) desorption kinetic constant was calculated regardless of the gas flow rate. The kinetic constant dropped up to 58% with the increasing relative humidity. The negative effect of humidity in terms of CO poisoning for PEM fuel cells was determined.

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Topics: Desorption , Carbon
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Figures

Grahic Jump Location
Fig. 1

SSITKA experimental setup

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Fig. 2

Effect of humidity on carbon monoxide desorption (60 sccm)

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Fig. 3

Effect of flow rate on desorption

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Fig. 4

Total 13CO desorption amounts at different humidity levels and flow rates

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Fig. 5

13CO surface coverage change versus time

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Fig. 6

Apparent kinetic constants at various humidity levels and flow rates

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Fig. 7

Real kinetic constant versus relative humidity

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