Container-Sized CO2 to Methane: Design, Construction and Catalytic Tests Using Raw Biogas to Biomethane

Rohit Gaikwad*, Sebastian N. B. Villadsen, Jan Pihl Rasmussen, Flemming Bjerg Grumsen, Lars Pleth Nielsen, Gary Gildert, Per Møller, Philip Loldrup Fosbøl*

*Corresponding author for this work

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Direct catalytic methanation of CO2 (from CO2/CH4 biogas mixture) to produce biomethane was conducted in a pilot demonstration plant. In the demonstration project (MeGa-StoRE), a biogas desulfurization process and thermochemical methanation of biogas using hydrogen produced by water electrolysis were carried out at a fully operational biogas plant in Denmark. The main objective of this part of the project was to design and develop a reactor system for catalytic conversion of CO2 in biogas to methane and feed biomethane directly to the existing natural gas grid. A process was developed in a portable container with a 10 Nm3/h of biogas conversion capacity. A test campaign was run at a biogas plant for more than 6 months, and long-time operation revealed a stable steady-state conversion of more than 90% CO2 conversion to methane. A detailed catalytic study was performed to investigate the high activity and stability of the applied catalyst.
Original languageEnglish
Article number1428
Issue number12
Number of pages13
Publication statusPublished - 2020

Bibliographical note

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (


  • Biogas
  • Biomethane
  • CO2 methanation
  • Demonstration pilot plant;
  • Adiabatic reactors
  • Movable container

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