Method and device for generating fuel for a gas turbine

The invention relates to a method for the separation of a hydrogen- and carbon dioxide-containing feed gas (1), from which, in a first gas scrubber (A1), carbon dioxide is substantially selectively extracted by scrubbing by a sulphur-free scrubbing medium (3), wherein a scrubbing medium stream (4) loaded with carbon dioxide and co-absorbed hydrogen is produced which is subsequently expanded into an expansion vessel (D1) in order to transfer co-absorbed hydrogen to the gas phase (9). A characteristic of the method is that the hydrogen-containing gas phase (9) is withdrawn from the expansion vessel (D1) and added to a sulphur-free, hydrogen- and carbon dioxide-containing gas mixture (17) which is formed in a second gas scrubber (A2) operated in parallel to the first, as a product at a pressure which is lower than the pressure of the feed gas (1).