Fuel reforming system and stopping method thereof
AssigneeNissan Motor Co., Ltd.
InventorHiroyuki Ichikawa
Life of this patent
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Abstract
When a fuel reforming system for a fuel cell comprising an autothermal reformer 1 wherein a partial oxidation reaction and steam reforming reaction proceeds simultaneously, is stopped, firstly, a supply valve 6 is closed to stop supply of fuel and water for steam reforming, and a supply valve 7 is closed after a predetermined time has elapsed to stop supply of air. In this way, the partial oxidation reaction which is an exothermic reaction is continued temporarily and the catalyst layer temperature of the reformer 1 is raised, so the catalyst layer temperature can be maintained high until the system restarts, and the time required for restarting the system can be shortened.
Claims13
A method of stopping a fuel reforming system with a reformer which generates hydrogen supplied to a fuel cell wherein fuel, water and air are supplied, and a partial oxidation reaction and steam reforming reaction are simultaneously performed, comprising:
- stopping the supply of fuel and water to the reformer so as to raise the catalyst layer temperature of the reformer by performing a partial oxidation reaction with the remaining fuel and air in the reformer, and
- stopping the supply of air to the reformer after the catalyst layer temperature has risen.
A fuel reforming system, comprising:
- a reformer which generates hydrogen supplied to a fuel cell wherein fuel, water and air are supplied, and a partial oxidation reaction and steam reforming reaction are simultaneously performed,
- a first supply mechanism which supplies fuel and water to the reformer,
- a second supply mechanism which supplies air to the reformer, and
- a controller which functions to:
- perform a partial oxidation reaction with the remaining fuel and air in the reformer by stopping the supply of fuel and water to the reformer from the first supply mechanism when the system is stopped, and
- stop the supply of air to the reformer from the second supply mechanism after the catalyst layer temperature has risen.
A fuel reforming system, comprising:
- a reformer which generates hydrogen supplied to a fuel cell wherein fuel, water and air are supplied, and a partial oxidation reaction and steam reforming reaction are simultaneously performed,
- a first supply mechanism which supplies fuel and water to the reformer,
- a second supply mechanism which supplies air to the reformer,
- means for performing a partial oxidation reaction with the remaining fuel and air in the reformer by stopping the supply of fuel and water to the reformer from the first supply mechanism when the system is stopped, and
- means for stopping the supply of air to the reformer from the second supply mechanism after the catalyst layer temperature has risen.
Dependencies are inferred from the claim text.