METHOD AND DEVICE FOR GENERATING A NATURAL GAS SUBSTITUTE CONTAINING METHANE

摘要

1. Method and device for generating a natural gas substitute containing methane and associated energy supply system. 2.1. The invention relates to a method and device for generating a natural gas substitute containing methane from a feed gas containing carbon dioxide and to an energy supply system equipped with such a device. 2.2. According to the invention, the feed gas is subjected to a methanization reaction, for which a hyperstoichiometric hydrogen content is set in the educt gas. The synthesis gas from the methanization reaction is divided by a gas separator into a retentate gas containing methane and providing the natural gas substitute and a permeate gas containing hydrogen. At least a portion of the permeate gas is returned to the feed gas and mixed with this forming the educt gas for the methanization reaction. 2.3. Use for instance for renewable energy supply systems converting biomass.