کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7738506 | 1497985 | 2014 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Air humidity and water pressure effects on the performance of air-cathode microbial fuel cell cathodes
ترجمه فارسی عنوان
رطوبت هوا و فشار آب بر روی عملکرد کاتد های سوختی میکروبی هوا کاتدی
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کلمات کلیدی
سلول های سوختی میکروبی، کاتد هوا، رطوبت، ولتاژ سنجش ولتاژ خطی، سیل آب
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
چکیده انگلیسی
To better understand how air cathode performance is affected by air humidification, microbial fuel cells were operated under different humidity conditions or water pressure conditions. Maximum power density decreased from 1130 ± 30 mW mâ2 with dry air to 980 ± 80 mW mâ2 with water-saturated air. When the cathode was exposed to higher water pressures by placing the cathode in a horizontal position, with the cathode oriented so it was on the reactor bottom, power was reduced for both with dry (1030 ± 130 mW mâ2) and water-saturated (390 ± 190 mW mâ2) air. Decreased performance was partly due to water flooding of the catalyst, which would hinder oxygen diffusion to the catalyst. However, drying used cathodes did not improve performance in electrochemical tests. Soaking the cathode in a weak acid solution, but not deionized water, mostly restored performance (960 ± 60 mW mâ2), suggesting that there was salt precipitation in the cathode that was enhanced by higher relative humidity or water pressure. These results showed that cathode performance could be adversely affected by both flooding and the subsequent salt precipitation, and therefore control of air humidity and water pressure may need to be considered for long-term MFC operation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 247, 1 February 2014, Pages 655-659
Journal: Journal of Power Sources - Volume 247, 1 February 2014, Pages 655-659
نویسندگان
Yongtae Ahn, Fang Zhang, Bruce E. Logan,