Open Access

ARTICLE

Study on Biological Pathway of Carbon Dioxide Methanation Based on Microbial Electrolysis Cell

Guanwen Ding, Qifen Li^*, Liting Zhang, Yuanbo Hou, Xiaoxiao Yan

College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, 200090, China

* Corresponding Author: Qifen Li. Email:

(This article belongs to this Special Issue: New Trends in Sustainable Materials for Energy Conversion, CO₂ Capture and Pollution Control)

Journal of Renewable Materials 2023, 11(1), 197-207. https://doi.org/10.32604/jrm.2023.020277

Received 15 November 2021; Accepted 22 February 2022; Issue published 10 August 2022

Abstract

Realization of CO₂ resource utilization is the main development direction of CO₂ reduction. The CO₂ methanation technology based on microbial electrolysis cell (MEC) has the characteristics of ambient temperature and pressure, green and low-carbon, which meets the need of low-carbon energy transition. However, the lack of the system such as the change of applied voltage and the reactor amplification will affect the methane production efficiency. In this research, the efficiency of methane production with different applied voltages and different types of reactors was carried out. The results were concluded that the maximum methane production rate of the H-type two-chamber microbial electrolysis cells (MECs) at an applied voltage of 0.8 V was obtained to be 1.15 times higher than that of 0.5 V; under the same conditions of inoculated sludge, the reactor was amplified 2.5 times and the cumulative amount of methane production was 1.04 times higher than the original. This research can provide a theoretical basis and technical reference for the early industrial application of CO₂ methanation technology based on MEC.

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Keywords

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