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Volume 9
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Article

Performance Analysis of Biocathode in Bioelectrochemical CO2 Reduction

by
Anirudh Bhanu Teja Nelabhotla
,
Rune Bakke
and
Carlos Dinamarca
*
Department of Process, Energy and Environmental Technology, University of South-Eastern Norway, Kjølnes ring 56, 3918 Porsgrunn, Norway
*
Author to whom correspondence should be addressed.
Catalysts 2019, 9(8), 683; https://doi.org/10.3390/catal9080683
Submission received: 18 July 2019 / Revised: 3 August 2019 / Accepted: 8 August 2019 / Published: 12 August 2019
(This article belongs to the Special Issue CO2 Capture and / or Its Transformation into Fuels or Valuable Chemicals)
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Abstract

Microbial electrosynthesis (MES) biogas upgrading is done via reduction of carbon dioxide to methane through electroactive microbial catalysis. The baseline MES mode of operation showed about a 39% increase in the methane production rate compared to the open circuit mode of operation. MES is capable of producing acetic acid at relatively more negative potential (−0.80 to –0.90 V vs. Standard Hydrogen Electrode (SHE)) than the potential at which it produces methane (−0.65 V vs. SHE). The optimum pH for enhancing the electroactive acetogens is found to be around 6.8–7.0 while a pH of around 7.0–7.5 enhances the electroactive methanogens performance. The biocathode adaptation test reveals that 45% of the methane was produced through the electrochemical pathway with a coulombic efficiency of 100% while maintaining heterotrophic efficiency above 99%.
Keywords: microbial electrosynthesis system; biocathode; biogas upgradation; methane; CO2 reduction microbial electrosynthesis system; biocathode; biogas upgradation; methane; CO2 reduction

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MDPI and ACS Style

Nelabhotla, A.B.T.; Bakke, R.; Dinamarca, C. Performance Analysis of Biocathode in Bioelectrochemical CO2 Reduction. Catalysts 2019, 9, 683. https://doi.org/10.3390/catal9080683

AMA Style

Nelabhotla ABT, Bakke R, Dinamarca C. Performance Analysis of Biocathode in Bioelectrochemical CO2 Reduction. Catalysts. 2019; 9(8):683. https://doi.org/10.3390/catal9080683

Chicago/Turabian Style

Nelabhotla, Anirudh Bhanu Teja, Rune Bakke, and Carlos Dinamarca. 2019. "Performance Analysis of Biocathode in Bioelectrochemical CO2 Reduction" Catalysts 9, no. 8: 683. https://doi.org/10.3390/catal9080683

APA Style

Nelabhotla, A. B. T., Bakke, R., & Dinamarca, C. (2019). Performance Analysis of Biocathode in Bioelectrochemical CO2 Reduction. Catalysts, 9(8), 683. https://doi.org/10.3390/catal9080683

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