MEMBRANE REFORMER

The invention relates to a membrane reformer for generating hydrogen, comprising a first cavity (1) with a feed (8) for a reactant, wherein hydrogen and at least one additional reaction product are generated in the cavity, a second cavity (3) which is arranged downstream of the first cavity and in which hydrogen and at least one other reaction product are further generated while simultaneously separating hydrogen via a membrane and introducing same into a third cavity, a third cavity (5) with a discharge (10) for hydrogen, a membrane (4) which is placed over a perforated film (7) and is installed between the second and the third cavity (5) that adjoin the membrane or film, and a discharge (9) for the hydrocarbon-containing gas, the at least one additional reaction product, and steam from the second cavity (3). The membrane reformer is made of a plate stack with multiple individual plates on both sides of the at least one membrane, and the cavities are produced by means of depressions or perforations in at least one respective plate.