Using cathode spacers to minimize reactor size in air cathode microbial fuel cells
KAUST Grant NumberKUS-I1-003-13
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AbstractScaling up microbial fuel cells (MFCs) will require more compact reactor designs. Spacers can be used to minimize the reactor size without adversely affecting performance. A single 1.5mm expanded plastic spacer (S1.5) produced a maximum power density (973±26mWm -2) that was similar to that of an MFC with the cathode exposed directly to air (no spacer). However, a very thin spacer (1.3mm) reduced power by 33%. Completely covering the air cathode with a solid plate did not eliminate power generation, indicating oxygen leakage into the reactor. The S1.5 spacer slightly increased columbic efficiencies (from 20% to 24%) as a result of reduced oxygen transfer into the system. Based on operating conditions (1000ς, CE=20%), it was estimated that 0.9Lh -1 of air would be needed for 1m 2 of cathode area suggesting active air flow may be needed for larger scale MFCs. © 2012 Elsevier Ltd.
CitationYang Q, Feng Y, Logan BE (2012) Using cathode spacers to minimize reactor size in air cathode microbial fuel cells. Bioresource Technology 110: 273–277. Available: http://dx.doi.org/10.1016/j.biortech.2012.01.121.
SponsorsThis research was supported by the King Abdullah University of Science and Technology (KAUST) (Award KUS-I1-003-13) and the State Key Laboratory of Urban Water Resource & Environment, Harbin Institute of Technology (2010DX08), National Creative Research Group of Natural Science Foundation of China (50821002), National Science Fund for Distinguished Young Scholars (51125033) and a scholarship to Q.Y. from the china scholarship council (CSC).
CollectionsPublications Acknowledging KAUST Support
- Electricity generation using an air-cathode single chamber microbial fuel cell in the presence and absence of a proton exchange membrane.
- Authors: Liu H, Logan BE
- Issue date: 2004 Jul 15
- Air-cathode structure optimization in separator-coupled microbial fuel cells.
- Authors: Zhang X, Sun H, Liang P, Huang X, Chen X, Logan BE
- Issue date: 2011 Dec 15
- Power generation in MFCs with architectures based on tubular cathodes or fully tubular reactors.
- Authors: Zuo Y, Logan BE
- Issue date: 2011
- Increasing power generation for scaling up single-chamber air cathode microbial fuel cells.
- Authors: Cheng S, Logan BE
- Issue date: 2011 Mar
- Graphite fiber brush anodes for increased power production in air-cathode microbial fuel cells.
- Authors: Logan B, Cheng S, Watson V, Estadt G
- Issue date: 2007 May 1