| abstract |
The invention relates to a process for the preparation of dimethyl ether, comprising the steps of: fermentation of biomass for the production of raw biogas containing methane and carbon dioxide, purification of the raw biogas by separation of carbon dioxide, whereby a methane-enriched raw biogas is obtained, production of synthesis gas comprising carbon monoxide and hydrogen Reaction of methane with oxygen, production of dimethyl ether from the synthesis gas by catalytic condensation of the synthesis gas or of the synthesis gas as an intermediate step condensed methanol; and a production plant for the production of dimethyl ether from the waste gases of the fermentation of biomass. |