Patent ID: 8677762

Claim:
A process for the preparation of hydrocarbon products and for the generation of power comprising the steps of: (a) providing a synthesis gas having a hydrogen to carbon monoxide ratio of between 0.1 and 1; (b) contacting the synthesis gas with one or more catalysts which together catalyse a reaction of hydrogen and carbon monoxide to oxygenates, the oxygenates comprising methanol and dimethyl ether with a ratio of the dimethyl ether to the methanol being higher than 2, the oxygenates further comprising carbon dioxide with a carbon dioxide content of above 20 mole %; (c) contacting the carbon dioxide containing oxygenate mixture at an inlet temperature of between 240 and 400° C. with a catalyst being active in the conversion of oxygenates to higher hydrocarbons and a fuel gas rich in carbon dioxide; (d) combusting the carbon dioxide rich fuel gas, optionally admixed with fresh carbon monoxide rich synthesis gas in a gas turbine combustion chamber to flue gas; and (e) expanding the flue gas stream through a gas turbine for the generation of power.