TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The device is operated continuously and/or in batch wise manner, where the batch wise operation of the device comprises at least one reconducting of the reformed or the scrubbed gas mixture before a supply of the at least one corresponding following component. The device comprises a reactor for the production of hydrogen from the gas mixture by hydrogen shift reaction. The device is coupled with an internal combustion engine, where the scrubbed gas mixture is usable for the operation of the internal combustion engine. The device is implemented for the extraction of fuel and comprises a catalyst for carrying out a catalytic reaction for the production of a reaction mixture from the scrubbed gas mixture and a separator for the separation of a fuel from the reaction mixture. The device comprises devices for a supply of hydrogen for the hydrogenation of the biomass or of the gas mixture obtained from the gasification and is operated as a closed system. The device comprises a device for a supply of hydrogen containing compounds to the biomass to their hydrogenation. The first recirculation device comprises an electrical preheating device (352) for preheating the reformed or scrubbed gas mixture that can be led back into the gasifier. The first recirculation device comprises a drain valve for the optional conducting of the reformed or the scrubbed gas mixture from the recirculation loop to the at least one corresponding following component of the device. The first recirculation device comprises a circulation pump for the operation of the recirculation loop. The device comprises a device for the hydrogen-electrolysis for the supply of hydrogen for a hydrogenation of the biomass or of the gas mixture obtained from the gasification. The device further comprises catalysts, filters, coolers, condensate-separators, heat exchangers and molecular sieves. The device comprises a second recirculating device, so that a gas mixture from the separator can be led back into the gasifier and/or supplied to the gasifier, where the second recirculating devices exhibit main stream and/or bypass lines. The device comprises a device for the supply of carbon dioxide. The device produces alcohol as fuel from the biomass. Preferred Method: The method further comprises drying the biomass before the step of gasification with the help of the gas mixture obtained or reformed from the gasification by a countercurrent heat exchanger. The water vapor obtained from the step of drying is used for the step of reformation. The method further comprises at least one of the steps comprising a real gasification, gas-vapor-reformation, coke-carbonization, coke-hydrogenation, tar condensation, electrolysis and a fuel synthesis.