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Power-to-Gas and Power-to-X—The History and Results of Developing a New Storage Concept

Abstract

Germany’s energy transition, known as ‘Energiewende’, was always very progressive. However, it came technically to a halt at the question of large-scale, seasonal energy storage for wind and solar, which was not available. At the end of the 2000s, we combined our knowledge of both electrical and process engineering, imitated nature by copying photosynthesis and developed Power-to-Gas by combining water electrolysis with CO2 -methanation to convert water and CO2 together with wind and solar power to synthetic natural gas. Storing green energy by coupling the electricity with the gas sector using its vast TWh-scale storage facility was the solution for the biggest energy problem of our time. This was the first concept that created the term ‘sector coupling’ or ‘sectoral integration’. We first implemented demo sites, presented our work in research, industry and ministries, and applied it in many macroeconomic studies. It was an initial idea that inspired others to rethink electricity as well as eFuels as an energy source and energy carrier. We developed the concept further to include Power-to-Liquid, Power-to-Chemicals and other ways to ‘convert’ electricity into molecules and climate-neutral feedstocks, and named it ‘Power-to-X’ at the beginning of the 2010s.

Funding source: This research was partly funded by the German Federal Environmental Agency in the research project ‘Modeling of 100 percent renewable power generation in 2050′, FKZ 363 01 277. The assembly and operation of the 25-kW P2G ® plant were financed by SolarFuel GmbH, renamed ETOGAS GmbH in 2013. The assembly and operation of the 250 kW P2G ® plant were supported by the Federal Ministry for Economic Affairs and Energy based on a resolution of the German Parliament (funded project no.: 0325275). The construction of the 6000 kW e-gas plant is an investment of the automobile manufacturer Audi AG. The monitoring of the e-gas plant is supported by the Federal Ministry for Economic Affairs and Energy based on a resolution of the German Parliament (funded project no.: 0325428).
Countries: Germany
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2021-10-13
2022-10-03
http://instance.metastore.ingenta.com/content/journal2603
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