Patent ID: 8404007
Filing Date: 2013-03-26
Classification: C01B

Abstract:
1. A reforming apparatus that includes a reforming-catalyst layer and produces reformed gas containing hydrogen, characterized by comprising: a first vaporizer that is cylindrically shaped and includes a first flow passage through which water flows; a second vaporizer that is cylindrically shaped and includes a second flow passage through which a mixture of steam and a raw material flows; a duct that connects an outlet of the first flow passage to an inlet of the second flow passage; and a raw-material mixing portion formed at a certain point of the duct, the reforming apparatus characterized in that the first vaporizer and the second vaporizer are concentrically disposed so that the first vaporizer is located on the outer side and the second vaporizer is located on the inner side, a cylindrical gap left between the first vaporizer and the second vaporizer serves as a heating-gas flow passage, in the first vaporizer, the water flowing through the first flow passage is heated by heating gas flowing through the heating-gas flow passage, and thereby the water is turned into steam, in the raw-material mixing portion, the mixture is obtained by mixing the raw material with the steam flowing through the duct after flowing out of the first flow passage, in the second vaporizer, while flowing through the second flow passage, the mixture is heated further by the heating gas flowing through the heating-gas flow passage, and the mixture is supplied to the reforming-catalyst layer; and wherein a low temperature CO-shift catalyst layer is disposed at an inner side of the second vaporizer.