Patent ID: 9079771
Filing Date: 2015-07-14
Classification: C01B,H01M,Y02E,Y02P

Abstract:
1. A method for operating a hydrogen generating apparatus, comprising steps of: generating a hydrogen-containing gas from a raw material and water through reformation reaction in a reforming device provided with a reformation catalyst; decreasing carbon monoxide in the hydrogen-containing gas through shift reaction in a converting device provided with a converting catalyst; stopping an operation for heating the reforming device at a time of shutdown; cooling the converting catalyst by using a cooling device, after stopping the operation for heating, such that a temperature of the converting catalyst becomes a first threshold value or lower at a same time or before a temperature of the reformation catalyst becomes a second threshold value or lower, wherein deterioration of the converting catalyst by the raw material is suppressed when the temperature of the converting catalyst is equal to or lower than the first threshold value, and deterioration of the reformation catalyst by the raw material is suppressed when the temperature of the reformation catalyst is equal to or lower than the second threshold value; judging that the temperature of the converting catalyst becomes the first threshold value; and when it is judged that the temperature of the converting catalyst is the first threshold value or lower at the time of shutdown, starting purging an interior of the converting device with the raw material.