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Design and construction of a new reactor for flexible biomethanation of hydrogen

  • The increasing share of renewable electricity in the grid drives the need for sufficient storage capacity. Especially for seasonal storage, power-to-gas can be a promising approach. Biologically produced methane from hydrogen produced from surplus electricity can be used to substitute natural gas in the existing infrastructure. Current reactor types are not or are poorly optimized for flexible methanation. Therefore, this work proposes a new reactor type with a plug flow reactor (PFR) design. Simulations in COMSOL Multiphysics ® showed promising properties for operation in laminar flow. An experiment was conducted to support the simulation results and to determine the gas fraction of the novel reactor, which was measured to be 29%. Based on these simulations and experimental results, the reactor was constructed as a 14 m long, 50 mm diameter tube with a meandering orientation. Data processing was established, and a step experiment was performed. In addition, a kLa of 1 h−1 was determined. The results revealed that the experimental outcomes of the type of flow and gas fractions are in line with the theoretical simulation. The new design shows promising properties for flexible methanation and will be tested.

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Author:Kevin HoffstadtORCiD, Dheeraja CheenakulaORCiD, Marcell NikolauszORCiD, Simone KrafftORCiD, Hauke Harms, Isabel KuperjansORCiD
Parent Title (English):Fermentation
Place of publication:Basel
Document Type:Article
Year of Completion:2023
Date of the Publication (Server):2023/08/22
Tag:bio-methane; bubble column; methanation; plug flow reactor; power-to-gas
First Page:1
Last Page:16
The article belongs to the Special Issue Fermentation Processes: Modeling, Optimization and Control
Institutes:FH Aachen / Fachbereich Chemie und Biotechnologie
FH Aachen / Fachbereich Energietechnik
FH Aachen / Nowum-Energy
collections:Verlag / MDPI
Open Access / Gold
Licence (German):License LogoCreative Commons - Namensnennung