کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
680138 1459964 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Anolyte recirculation effects in buffered and unbuffered single-chamber air-cathode microbial fuel cells
ترجمه فارسی عنوان
اثرات گردش خون آنولیت در سلول های سوختی میکروبی هوا با کاتد و بدون بوفریس
کلمات کلیدی
سلول های سوختی میکروبی، بی فایده، تجمع انالیت، انتقال پروتون، انتقال اکسیژن
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
چکیده انگلیسی


• Anolyte recirculation was tested in air-cathode MFCs to enhance proton transfer.
• Identical reactors were operated either with or without phosphate buffer.
• The bufferless MFC had 10% lower maximum power and 64% higher Coulombic efficiency.
• Higher recirculation flow rates enhanced proton transfer in the bufferless MFC.
• A high flow rate decreased overall performance due to excess oxygen in the anode.

Two identical microbial fuel cells (MFCs) with a floating air-cathode were operated under either buffered (MFC-B) or bufferless (MFC-BL) conditions to investigate anolyte recirculation effects on enhancing proton transfer. With an external resistance of 50 Ω and recirculation rate of 1.0 ml/min, MFC-BL had a 27% lower voltage (9.7% lower maximal power density) but a 64% higher Coulombic efficiency (CE) than MFC-B. MFC-B had a decreased voltage output, batch time, and CE with increasing recirculation rate resulting from more oxygen transfer into the anode. However, increasing the recirculation rate within a low range significantly enhanced proton transfer in MFC-BL, resulting in a higher voltage output, a longer batch time, and a higher CE. A further increase in recirculation rate decreased the batch time and CE of MFC-BL due to excess oxygen transfer into anode outweighing the proton-transfer benefits. The unbuffered MFC had an optimal recirculation rate of 0.35 ml/min.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 179, March 2015, Pages 26–34
نویسندگان
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