Open Access
ARTICLE
Study on Influencing Factors of Methane Production Efficiency of Microbial Electrolytic Cell with CO2 as Carbon Source
Qifen Li, Yuanbo Hou*, Yongwen Yang, Liting Zhang, Xiaoxiao Yan
College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, 200090, China
* Corresponding Author: Yuanbo Hou. Email:
(This article belongs to the Special Issue: New Trends in Renewable and Sustainable Materials for Carbon Neutrality)
Journal of Renewable Materials 2023, 11(8), 3333-3350. https://doi.org/10.32604/jrm.2023.027464
Received 31 October 2022; Accepted 05 January 2023; Issue published 26 June 2023
Abstract
Reducing CO
2 to produce methane through microbial electrolytic cell (MEC) is one of the important methods of CO
2 resource utilization. In view of the problem of low methanogenesis rate and weak CO
2 conversion rate in the reduction process, the flow field environment of the cathode chamber is changed by changing the upper gas circulation rate and the lower liquid circulation rate of the cathode chamber to explore the impact on the reactor startup and operation and products. The results showed that under certain conditions, the CO
2 consumption and methane production rate could be increased by changing the upper gas recirculation rate alone, but the increase effect was not obvious, but the by-product hydrogen production decreased significantly. Changing the lower liquid circulation rate alone can effectively promote the growth of biofilm, and change the properties of biofilm at the later stage of the experiment, with the peak current density increased by 16%; The methanogenic rate decreased from the peak value of 0.561 to 0.3 mmol/d, and the CO
2 consumption did not change significantly, which indicated that CO
2 was converted into other organic substances instead of methane. The data after coupling the upper gas circulation rate with the lower liquid circulation rate is similar to that of only changing the lower liquid circulation rate, but changing the upper gas circulation rate can alleviate the decline of methane production rate caused by the change of biofilm properties, which not only improves the current density, but also increases the methane production rate by 0.05 mmol/d in the stable period. This study can provide theoretical and technical support for the industrial application scenario of flow field regulation intervention of microbial electrolytic cell methanogenesis.
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Cite This Article
APA Style
Li, Q., Hou, Y., Yang, Y., Zhang, L., Yan, X. (2023). Study on influencing factors of methane production efficiency of microbial electrolytic cell with co<sub>2</sub> as carbon source. Journal of Renewable Materials, 11(8), 3333-3350. https://doi.org/10.32604/jrm.2023.027464
Vancouver Style
Li Q, Hou Y, Yang Y, Zhang L, Yan X. Study on influencing factors of methane production efficiency of microbial electrolytic cell with co<sub>2</sub> as carbon source. J Renew Mater. 2023;11(8):3333-3350 https://doi.org/10.32604/jrm.2023.027464
IEEE Style
Q. Li, Y. Hou, Y. Yang, L. Zhang, and X. Yan "Study on Influencing Factors of Methane Production Efficiency of Microbial Electrolytic Cell with CO<sub>2</sub> as Carbon Source," J. Renew. Mater., vol. 11, no. 8, pp. 3333-3350. 2023. https://doi.org/10.32604/jrm.2023.027464