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Technical Briefs

Improvement of CO Tolerance of Proton Exchange Membrane Fuel Cell by an Air-Bleeding Technique

[+] Author and Article Information
Chiun-Hsun Chen

Department of Mechanical Engineering,  National Chiao Tung University, Hsinchu, Taiwan 300, R.O.Cchchen@mail.nctu.edu.tw

Chen-Chung Chung

Department of Mechanical Engineering,  National Chiao Tung University, Hsinchu, Taiwan 300, R.O.C

Hsiang-Hui Lin, Yi-Yie Yan

Fuel Cell and Hydrogen Energy Laboratories,  Industrial Technology Research Institute, HsinChu, Taiwan 310, R.O.C. and Energy and Resources Laboratories,  Industrial Technology Research Institute, HsinChu, Taiwan 310, R.O.C.

J. Fuel Cell Sci. Technol 5(1), 014501 (Jan 31, 2008) (5 pages) doi:10.1115/1.2784278 History: Received September 12, 2005; Revised January 11, 2007; Published January 31, 2008

This study investigates the improvement of proton exchange membrane fuel cell (PEMFC) carbon monoxide by periodic air dosing. The carbon monoxide in the fuel gas leads to a significant loss in power density due to CO poisoning in the anode. The method involves bleeding air into the anode fuel stream (H2CO), which contains CO in various concentrations (20ppm, 52.7ppm, and 100ppm). In the transient CO poisoning test, air bleeding is performed for four different periodic air dosing and cell voltage is fixed at 0.6V. The result of a dosing of air for 10s in intervals of 10s is similar to that of continuous air bleeding except for 100ppm CO. The CO tolerance of the fuel cell and cell performance recovery from poisoning can be improved by air bleeding.

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Copyright © 2008 by American Society of Mechanical Engineers
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Figures

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Figure 1

Transient performance with continuously changing air ratio at 25ppm CO

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Figure 2

Transient poisoning and recovery performances with different air-bleeding frequencies (25ppm CO)

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Figure 3

I‐V curve with different air-bleeding frequencies (25ppm CO)

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Figure 4

Transient poisoning and recovery performances with different air-bleeding frequencies (52.7ppm CO)

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Figure 5

I‐V curve with different air-bleeding frequencies (52.7ppm CO)

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Figure 6

Transient poisoning and recovery performances with different air-bleeding frequencies (100ppm CO)

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Figure 7

I‐V curve with different air-bleeding frequencies (100ppm CO)

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Figure 8

Transient air-bleeding long-time test with CO poisoning concentrations (25ppm), a dosing of air for 10s in intervals of 10s

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Figure 9

Transient air-bleeding long-time test with CO poisoning concentrations (52.7ppm), a dosing of air for 10s in intervals of 10s

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