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Control for catalytic combustor

A catalytic burner and catalyst technology, applied in the direction of burners, gas fuel burners, combustion methods, etc.

Inactive Publication Date: 2010-01-20
NISSAN MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the conventional technology is accompanied by a problem that during a period in which the temperature of the catalyst in the catalytic burner is low, that is, when the activity of the catalyst is low, a part of the fuel injected into the catalytic burner is exhausted without undergoing combustion.

Method used

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  • Control for catalytic combustor
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Examples

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Embodiment Construction

[0015] refer to Figure 1A and 1B , an exemplary fuel cell system 1 including a catalytic combustor according to the present invention will be described. This fuel cell system includes: a fuel cell 2 for obtaining an electromotive force from an electrochemical reaction; a compressor 5 for supplying compressed air as an oxygen-containing gas; a reformer 6 for producing a hydrogen gas; and a catalytic burner 9 serving as a heat source for the heat exchange operation in the vaporizer 8 . In this description, a gas containing oxygen is sometimes referred to as an "oxygen-containing gas".

[0016] The starting materials for the reforming reaction are methanol and water stored in a methanol tank 13 and a water tank 15, respectively. Methanol is delivered to the vaporizer 8 by a first pump 14 which sucks methanol. The steam and methanol vapor generated in the vaporizer 8 are sent to the reformer 6 .

[0017] In the reformer 6, methanol vapor and steam supplied from the vaporizer ...

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Abstract

A fuel injector (11) supplies liquid fuel to a catalytic combustor (9) of a fuel reforming device during startup of a fuel reforming device. A controller sets the injection amount (Qf) for liquid fuel to a first injection amount (Qf1) during a predetermined time (t1) after starting fuel injection. After the predetermined time, the injection amount (Qf) is set to a second injection amount (Qf2) which is larger than the first injection amount (Qf1). When the elapsed time after starting fuel injection is smaller than a value (t1), the discharged amount of uncombusted fuel is reduced by setting the injection amount (Qf) to a minimum injection amount (Qf1) which allows ignition and combustion in the catalyst.

Description

technical field [0001] The present invention relates to a catalytic burner that can be used in a fuel cell system. Furthermore, it relates to a method of supplying fuel and an oxygen-containing gas to a catalytic burner. Background technique [0002] A liquid hydrocarbon fuel such as methanol is reformed by a reformer to obtain a hydrogen-containing gas supplied to a fuel cell. Reformers use water and fuel in the gaseous state. Therefore a vaporizer or a heat exchanger is generally provided in the fuel cell system in order to vaporize water and liquid fuel. [0003] The heat required for the vaporizer or heat exchanger is often supplied by combustion gases from a burner which combusts the anode exhaust gas from the fuel cell with air or the reformed gas with air. However, when the fuel cell system is started up, there occurs a problem that the reformed gas or anode off-gas burned in the burner cannot be obtained or the generated amount thereof is insufficient. Tokkai 200...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/06H01M8/04F23D14/18F23N1/02C01B3/32F01N3/00F23N5/00F23N5/20H01M8/00
CPCH01M8/04268H01M8/0612H01M8/04022Y02E60/50H01M8/06H01M8/04
Inventor 山口浩一庄子忠的场雅司
Owner NISSAN MOTOR CO LTD
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