Optimized biological CO2-methanation with a pure culture of thermophilic methanogenic archaea in a trickle-bed reactor
- In this study, a fully automated process converting hydrogen and carbon dioxide to methane in a high temperature trickle-bed reactor was developed from lab scale to field test level. The reactor design and system performance was optimized to yield high methane content in the product gas for direct feed-in to the gas grid. The reaction was catalyzed by a pure culture of Methanothermobacter thermoautotrophicus IM5, which formed a biofilm on ceramic packing elements. During 600 h in continuous and semi-continuous operation in countercurrent flow, the 0.05 m3 reactor produced up to 95.3 % of methane at a methane production rate of 0.35 mCH43mR-3h-1. Adding nitrogen as carrier gas during startup, foam control and dosing of ammonium and sodium sulfide as nitrogen and sulfur source were important factors for process automation.
Author: | Martin Thema, Tobias Weidlich, Anja Kaul, Andrea Böllmann, Harald Huber, Annett BellackORCiD, Jürgen Karl, Michael SternerORCiDGND |
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DOI: | https://doi.org/10.1016/j.biortech.2021.125135 |
Parent Title (English): | Bioresource Technology |
Publisher: | Elsevier |
Document Type: | Article |
Language: | English |
Year of first Publication: | 2021 |
Release Date: | 2021/10/27 |
Tag: | Biological methanation; Power-to-Gas; Reactor concept; Thermophilic archaea; Trickle-bed reactor |
Issue: | 333 |
Article Number: | 125135 |
Institutes: | Fakultät Elektro- und Informationstechnik |
Fakultät Elektro- und Informationstechnik / Forschungsstelle für Energienetze und Energiespeicher (FENES) / Forschungsgruppe Energiespeicher | |
Begutachtungsstatus: | peer-reviewed |
research focus: | Energie und Mobilität |
Licence (German): | Keine Lizenz - Es gilt das deutsche Urheberrecht: § 53 UrhG |