Abstract: There is disclosed a permselective membrane reactor which efficiently forms hydrogen by use of a water-gas shift reaction and which is excellent in an aspect of manufacturing cost. In a permselective membrane reactor, a permselective membrane is a Pd membrane or a Pd alloy membrane, and a catalyst layer includes a first catalyst layer on the side of the permselective membrane and a second catalyst layer disposed apart from the permselective membrane. The first catalyst layer has a noble metal-based catalyst, and the second catalyst layer has an iron-based catalyst.

Abstract: There is disclosed a permselective membrane type reactor which efficiently forms hydrogen by use of a water-gas shift reaction and which is excellent in an aspect of manufacturing cost. In a permselective membrane type reactor 100, a permselective membrane 3 is a Pd membrane or a Pd alloy membrane, and a catalyst layer 4 includes a first catalyst layer 4a on the side of the permselective membrane 3 and a second catalyst layer 4b disposed apart from the permselective membrane 3. The first catalyst layer 4a has a noble metal-based catalyst, and the second catalyst layer 4b has an iron-based catalyst.

Abstract: There is disclosed a membrane reactor 100 for a shift reaction including a selectively permeable membrane 3 having an H2-selective permeation ability and a catalyst 4 which promotes a chemical reaction, the selectively permeable membrane 3 is a Pd membrane or a Pd alloy membrane, the catalyst 4 is a precious metal catalyst, and the selectively permeable membrane preferably has a thickness of 20 ?m or less. The membrane reactor 100 for the shift reaction simultaneously performs inhibition of a methanation reaction and progression of a shift reaction while preventing deterioration of a thinly formed selectively permeable membrane, whereby hydrogen can efficiently be collected.