Multi-variable mathematical models for the air-cathode microbial fuel cell system

JOURNAL OF POWER SOURCES

卷:314

Article

Ou, Shiqi¹  Kashima, Hiroyuki²  Aaron, Douglas S.¹  Regan, John M.²  Mench, Matthew M.¹ 

[1] Univ Tennessee, Dept Mech Aerosp & Biomed Engn, Knoxville, TN 37996 USA

[2] Penn State Univ, Dept Civil & Environm Engn, University Pk, PA 16802 USA

关键词: Microbial fuel cell;    Computational simulation;    Cathode limitations;    Catalyst;    Mass transport;    Electrochemical reactions;   

DOI  :  10.1016/j.jpowsour.2016.02.064

来源: Elsevier

【 摘 要 】

This research adopted the version control system into the model construction for the single chamber air cathode microbial fuel cell (MFC) system, to understand the interrelation of biological, chemical, and electrochemical reactions. The anodic steady state model was used to consider the chemical species diffusion and electric migration influence to the MFC performance. In the cathodic steady state model, the mass transport and reactions in a multi-layer, abiotic cathode and multi-bacteria cathode biofilm were simulated. Transport of hydroxide was assumed for cathodic pH change. This assumption is an alternative to the typical notion of proton consumption during oxygen reduction to explain elevated cathode pH. The cathodic steady state model provided the power density and polarization curve performance results that can be compared to an experimental MFC system. Another aspect considered was the relative contributions of platinum catalyst and microbes on the cathode to the oxygen reduction reaction (ORR). Simulation results showed that the biocatalyst in a cathode that includes a Pt/C catalyst likely plays a minor role in ORR, contributing up to 8% of the total power calculated by the models. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

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