E3S Web Conf.
Volume 334, 2022EFC21 - European Fuel Cells and Hydrogen Piero Lunghi Conference
|Number of page(s)||6|
|Section||Microbial & Enzymatic Biolectrochemical Systems|
|Published online||10 January 2022|
Testing novel multicomposite materials for electromethanogenesis
1 Università degli Studi di Milano, Department of Environmental Sciences and Policy, Milano, Italy
2 Università degli Studi di Milano, Department of Agricuture and Environmental Sciences, Milano, Italy
3 Ricerca sul Sistema Energetico - RSE S.p.A., 20134 Milano, Italy
* Corresponding author: Pierangela.Cristiani@rse-web.it
Electromethanogenesis is an innovative technology that uses a microbial electrochemical system to produce methane from CO2, in a power-to-gas (BEP2G) concept. The results of experimental tests of new and cost-effective carbonaceous materials for electrode are presented here. The study aims at optimizing electromethanogenesis processes at laboratory level in mesothermic condition. As part of the experiments, hydrogenotrophic microorganisms (Family Metanobacteriaceae of Archaea domains) were selected from a mixed consortium taken from a biogas digestate and inoculated in double-chamber bioelectrochemical systems. The maximum amount of methane produced was 0.3 - 0.8 mol/m2g (normalized to the cathode area) with carbon cloth electrodes. Aiming at improving the methane productivity, innovative materials for the electrodes were now studied, creating porous high-surface composites, and studying nitrogen carbons doped with Cu and hydroxyapatite (Multicomposite Cu@/HAP/C), as chemical catalysts for CO2 reduction (CO2RR). The description of the procedure for the Multicomposite Cu@/HAP/C production is reported in detail.
© The Authors, published by EDP Sciences, 2022
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