کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6470639 1424111 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microbial fuel cells connected in series in a common electrolyte underperform: Understanding why and in what context such a set-up can be applied
ترجمه فارسی عنوان
سلولهای سوختی میکروبی به طور سریال در یک الکترولیت رایج به کار رفته اند: درک اینکه چرا و در چه چارچوب چنین مجموعه ای می تواند اعمال شود
کلمات کلیدی
مدل سازی عددی، توزیع بالقوه، خط فعلی سیستم بیو الکتروشیمیایی، دریچه الکترومکروبی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی

Microbial fuel cells (MFCs) have the outstanding ability to transform the chemical energy contained in organic matter directly to electrical energy. Unfortunately, they give only low cell voltage at maximum power. Connecting several MFCs electrically in series inside the same reactor may be a way to increase the cell voltage, but experimental attempts have shown poor efficiency for such single-electrolyte stacks.The present study uses numerical modelling to understand the behaviour of single-electrolyte MFC stacks and to assess possible ways to improve it. The numerical model was validated by comparison with two experimental MFCs that produced 0.85 ± 0.05 mW each at 0.23 V cell voltage. Connected in series in a common electrolyte, the stack produced only 0.7 mW at 0.21 V, while, in theory, 1.7 mW could be reached at 0.47 V. The model showed that the drastic power loss was due to ionic short-circuiting, which may, however, be an interesting phenomenon to be exploited for designing an electro-microbial snorkel. The model also showed that decreasing the anode-cathode distance, increasing the distance between the MFCs or using baffles between them could optimize the single-electrolyte stack to produce up to 80% of the theoretical maximum power. Nevertheless, such designs are appropriate only for specific applications, e.g. biosensing. The model further suggests that benthic MFCs could be effectively connected in series.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 246, 20 August 2017, Pages 879-889
نویسندگان
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