Patent ID: 8372375
Filing Date: 2013-02-12
Classification: C01B

Abstract:
1. A method of producing high-purity hydrogen, comprising the steps of: (a) reforming a reformable raw material to yield a hydrogen-rich reformed gas as a reforming step; (b) allowing the reformed gas to pass through a pressure swing adsorption (PSA) tower having a PSA adsorbent to remove unnecessary gases by adsorption to thereby yield a carbon monoxide-containing hydrogen gas in an unnecessary gas removing step; and (c) removing carbon monoxide from said carbon monoxide-containing hydrogen gas as a carbon monoxide removing step by passing said carbon monoxide-containing hydrogen gas through a carbon monoxide adsorption tower packed with an adsorbent selective for carbon monoxide and which removes carbon monoxide by a selective adsorption yielding a high-purity hydrogen, wherein said adsorbent selective for carbon monoxide of said carbon monoxide adsorption tower is different from said PSA adsorbent, and wherein the adsorbent selective for carbon monoxide is a material comprising a support, and (i) a copper(I) halide and/or (ii) a copper(II) halide supported on the support, or is a reduced product of (i) the copper(I) halide and/or (ii) the copper(II) halide, and wherein the support is at least one support selected from the group consisting of silica, alumina, activated carbon, graphite, and a styrenic resin.