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Method for managing a fuel cell during sulfur compound pollution, and power supply device

A technology of sulfur compounds and fuel cells, which is applied in the fields of fuel cells, fuel cell additives, fuel cell control, etc., and can solve problems such as inappropriate technology

Inactive Publication Date: 2012-10-10
COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
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  • Abstract
  • Description
  • Claims
  • Application Information

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  • Method for managing a fuel cell during sulfur compound pollution, and power supply device
  • Method for managing a fuel cell during sulfur compound pollution, and power supply device
  • Method for managing a fuel cell during sulfur compound pollution, and power supply device

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Embodiment Construction

[0020] The article "The effect of ambient contamination on PEMFC performance" (Jing et al., Journal of Power Sources, 166, 172-176, 2007) describes sulfur dioxide SO 2 Mechanisms of contamination of oxidizing gases. Some air containing sulfur dioxide was injected into the cells to determine the effect of such pollution on performance. Sulfur dioxide is adsorbed onto the catalyst layer made of platinum, reducing the active surface and thus the catalytic activity. The battery performance decreased by about 35% after about 100 hours of pollution, and the recovery rate was about 84%.

[0021] Another pollutant using the oxidizing gas: nitrogen dioxide NO 2 Repeat the experiment. In the same way, nitrogen dioxide was fixed to the catalytic site and degraded the battery performance by 10% after about 100 hours of pollution, and the recovery rate was about 94%.

[0022] Uses include nitrogen dioxide NO 2 and sulfur dioxide SO 2 The oxidizing gas was used for the third experimen...

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Abstract

The fuel cell management method, comprising an active gas flowing in contact with an electrode, includes a step of comparing the concentration of a sulfur compound in the active gas to a threshold indicative of a sulfur compound pollution phase (P2) and moreover includes a step of temporarily adding (P3) an oxygenated non-sulfur polluting gas into the active gas if the concentration is greater than the threshold. The polluting gas can be added during or after the pollution phase (P2).

Description

technical field [0001] The invention relates to a method for operating a fuel cell comprising a flowing active gas in contact with electrodes. [0002] The invention also relates to a power supply device comprising a fuel cell. Background technique [0003] A fuel cell is an electrochemical system that enables the conversion of chemical energy into electricity. For a proton exchange membrane fuel cell (PEMFC), the chemical energy is, for example, in the form of gaseous hydrogen. The fuel cell is divided into two chambers separated by a proton exchange membrane. One of the chambers is supplied with, for example, hydrogen gas or methanol called fuel gas, and oxygen or air called oxidizing gas is supplied to the other chamber. At the anode, the oxidation reaction of hydrogen produces protons and electrons. The protons pass through the membrane, while the electrons must pass through an external circuit to reach the cathode. The reduction reaction of oxygen occurs at the cat...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04H01M8/06
CPCH01M2008/1095H01M8/0675H01M8/0444H01M8/04223Y02E60/50H01M8/043H01M8/04225
Inventor O.勒梅尔B.巴思A.弗兰科
Owner COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES