Hydrogen generator and fuel cell system

Details Hydrogen generator and fuel cell system Hydrogen generator and fuel cell system

2008-09-02

2008-09-02

Griffin, Walter D. (Department: 1797)

Gas: heating and illuminating

Apparatus for converting or treating hydrocarbon gas

C048S061000, C048S1970FM, C048S198700, C422S105000, C422S198000, C429S010000, C429S006000

Reexamination Certificate

active

11039082

ABSTRACT:
In a hydrogen generator according to the invention, a reformer temperature sensor detects the temperature of a reformer at a start of a stop operation of a hydrogen generator. In a controller, a processing and controlling portion compares the detected temperature with first to fourth reference temperatures pre-stored in a storage portion, and determines which of the following conditions is the temperature condition of the hydrogen generator at the stop; a first condition in which water condensation occurs, a second condition in which water condensation and carbon deposition are avoidable, a third condition in which carbon deposition occurs, a fourth condition in which disproportionation reaction occurs, and a fifth condition in which oxidization of catalyst occurs. According to the determination result, an appropriate setting is selected among first to fifth replacement settings pre-stored in the controller corresponding to the first to fifth conditions, and an internal gas replacement operation is performed according to the selected setting.

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