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Fuel cell system

A fuel cell system and fuel technology, applied in fuel cells, fuel cell additives, circuits, etc., can solve the problems of CO selective oxidation catalyst poisoning, degradation of CO selective oxidation catalyst characteristics, anode poisoning, etc.

Inactive Publication Date: 2006-09-27
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In addition, although air as an oxidant gas is supplied to the CO selective oxidation reaction part as described above, organic substances such as HCHO, NOx, and SOx contained in the air poison the CO selective oxidation catalyst, and the characteristics of the CO selective oxidation catalyst deteriorate, resulting in The problem of anode poisoning by CO, proposed a CO remover for removing impurities in the air used for the CO selective oxidation reaction, and a fuel cell system using the CO remover

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  • Fuel cell system
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Examples

Experimental program
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Embodiment approach 1

[0081] figure 1 It is a schematic diagram of the fuel cell system according to Embodiment 1 of the present invention. Such as figure 1 As shown, the fuel cell system according to Embodiment 1 includes a hydrogen generator 20 for generating a hydrogen-rich gas. This hydrogen generator 20 has a reforming reaction unit 1 filled with a Ru / alumina catalyst for generating a hydrogen-rich gas containing carbon monoxide from fuel containing hydrocarbons and water. Also, the hydrogen generator 20 has a reforming reaction unit 2 filled with a Pt / CeZrOx catalyst, which is an oxidation-resistant reforming reaction catalyst, on the downstream side of the reforming reaction unit 1 based on the flow direction of the fuel. In the shift reaction section 2, a reduction process of CO by-produced in the reforming reaction section 1 is performed. The hydrogen generator 20 also has a CO selective oxidation reaction section (carbon monoxide removal section) 3 filled with a selective oxidation rea...

Embodiment approach 2

[0102] figure 2 It is an explanatory diagram of a schematic configuration of a fuel cell system according to Embodiment 2 of the present invention. Such as figure 2 As shown, the fuel cell system of the second embodiment is the same as that of the first embodiment except that the catalytic combustion unit 14 has the function of absorbing sulfur oxides. therefore, figure 2 In pair with figure 1 The same parts or corresponding parts are denoted by the same symbols, detailed explanations are omitted, and differences are mainly explained.

[0103] The catalyst combustion unit 14 of the fuel cell system according to Embodiment 2 is a particulate catalyst in which barium oxide and platinum are supported on alumina. The catalytic combustion unit 14 corresponds to the catalytic combustion unit 12 and the sulfur oxide absorption unit 13 in the first embodiment. On the heated precious metal, sulfur dioxide and hydrogen sulfide are oxidized to sulfur trioxide, which is absorbed b...

Embodiment 1

[0112] In Example 1, a catalyst layer electrolyte assembly (hereinafter referred to as "MEA") was produced, gas and air were passed through the MEA, and the influence of impurities in the air was tested.

[0113] First, the method for producing the MEA will be described below.

[0114] Add water and perfluorosulfonic acid ionomer ethanol solution (perfluorosulfonic acid ionomer solution) (Flemion: 9wt% gold fluorosulfonic acid ionomer) manufactured by Asahi Glass Co., Ltd. to the Pt / C catalyst, Prepare catalyst ink. In addition, the weight ratio of Flemion and carbon black was adjusted to 1. Apply the catalyst ink on the carbon paper by doctor blade method to make it reach Pt 0.3mg / cm 2 , make it dry under the condition of 60 ℃, make the cathode side gas diffusion electrode layer.

[0115] On the other hand, the gas diffusion electrode layer on the anode side was made with 30wt%Pt-24wt%Ru / C in the same way to make it reach Pt 0.3mg / cm 2 .

[0116] Nafion 112 membranes (ma...

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Abstract

A fuel cell system comprising hydrogen production unit (20) including reforming section (1) in which a hydrogen-enriched gas is produced, shift reaction section (2) in which hydrogen and carbon dioxide are produced from water and carbon monoxide contained in the hydrogen-enriched gas, and carbon monoxide removing section (3) for reducing the amount of carbon monoxide not having been removed in the shift reaction section (2) and remaining in the hydrogen-enriched gas; fuel cell (4) in which electricity generation is carried out with the hydrogen-enriched gas fed from the hydrogen production unit (20) and an oxidizer gas; air feeding sections (6,9) for feeding air to at least one portion (2) between the fuel cell (4) and the carbon monoxide removing section (3), or (1) upstream of the reforming section (1) on the basis of the direction of flow of fuel gas; and impurity removing means (12,13) for removing any impurity gas contained in the air.

Description

technical field [0001] The present invention relates to fuel cell systems. More specifically, it relates to a fuel cell system having a hydrogen generator that passes a fuel containing hydrocarbons and water through a catalyst to generate a hydrogen-rich gas containing carbon monoxide, in which system the The impurity gas contained in the air of the reaction part or the anode is reformed. Background technique [0002] Various types of fuel cell systems have been developed for generating electricity using hydrogen and oxygen in the air, but fuel cells used in households generally have the following configuration. [0003] First, methane, ethane, propane, butane, city gas, LP gas, and other hydrocarbons (mixed gas containing two or more hydrocarbons) are reformed in the reforming reactor to produce hydrogen-rich gas. [0004] As the reforming reaction method, there are steam reforming reaction method using steam for reforming reaction, partial oxidation method using oxygen ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/06H01M8/04C01B3/38C01B3/48
CPCH01M8/0612H01M8/0618C01B2203/1288C01B2203/1047H01M8/0662C01B2203/044H01M8/04089C01B2203/1604C01B3/382C01B2203/0244Y02E60/50C01B2203/127C01B2203/0283C01B3/48C01B2203/047C01B2203/066
Inventor 胁田英延可儿幸宗藤原诚二田口清鹈饲邦弘
Owner PANASONIC CORP