کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7739910 | 1497990 | 2013 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Comprehensive study of an air bleeding technique on the performance of a proton-exchange membrane fuel cell subjected to CO poisoning
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Comprehensive study of an air bleeding technique on the performance of a proton-exchange membrane fuel cell subjected to CO poisoning Comprehensive study of an air bleeding technique on the performance of a proton-exchange membrane fuel cell subjected to CO poisoning](/preview/png/7739910.png)
چکیده انگلیسی
CO poisoning is a major issue for proton-exchange membrane fuel cells (PEMFCs) when reformate gas is used as a fuel, especially at low temperatures (<80 °C). The performance of a PEMFC is investigated when subject to CO poisoning under different operation conditions and a simplified model is hereby proposed. It is found that even when the a CO-tolerant material like platinum-ruthenium (Pt-Ru) is used as the anode catalyst, the cell loses approximately 40% of its current density within 40 min with hydrogen fuel containing 25 ppm CO. By applying 5% air bleeding, the cell output current can be restored to 90% within 10 min, even at high CO concentrations (200 ppm). However, excessive air bleeding (>10% air) also reduces the cell output power. Based on impedance measurements, CO poisoning can strongly increase the charge transfer resistance without affecting the cell internal resistance. The stability test for 300 h using 200 ppm CO and 5% air bleeding shows that the cell power output can remain stable with the overall degradation less than 2%. From the viewpoints of system design and operation, air bleeding offers a stable power output and allows for a simpler, smaller, and cheaper reformer.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 242, 15 November 2013, Pages 264-272
Journal: Journal of Power Sources - Volume 242, 15 November 2013, Pages 264-272
نویسندگان
Lung-Yu Sung, Bing-Joe Hwang, Kan-Lin Hsueh, Wei-Nien Su, Chang-Chung Yang,