Prevention of chromia-induced cathode poisoning in solid oxide fuel cells (SOFC)

A fuel cell, fuel cell system technology, applied in solid electrolyte fuel cells, fuel cell parts, fuel cells, etc.

Inactive Publication Date: 2005-08-03
GENERAL ELECTRIC CO
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The high degradation rate problem of the cathode is not solved

Method used

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  • Prevention of chromia-induced cathode poisoning in solid oxide fuel cells (SOFC)
  • Prevention of chromia-induced cathode poisoning in solid oxide fuel cells (SOFC)
  • Prevention of chromia-induced cathode poisoning in solid oxide fuel cells (SOFC)

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Embodiment Construction

[0018] In the following description, the same reference numerals denote the same or corresponding parts throughout the several views shown in the drawings. It should also be understood that terms such as "above", "below", "inside", "outside" and similar words are used for convenience only and do not constitute limitations of the terms themselves.

[0019] When referring generally to the drawings and in particular to figure 1 When shown, it should be understood that these views are for purposes of illustrating preferred embodiments of the invention and are not intended to limit the invention thereto.

[0020] Fuel cells directly convert gaseous fuels (hydrogen, natural gas, gasified coal) into electricity through an electrochemical process. Their efficiency is not limited by the Carnot cycle of heat engines, and the amount of pollutants emitted from the fuel cell is many times lower than in conventional processes. A fuel cell operates similarly to a battery, but it does not n...

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Abstract

A method is provided for increasing the life expectancy of a solid oxide fuel cell by preventing cathode poisoning due to chromium volatilization. Chromium hydroxide and oxyhydroxide formation and evaporation are prevented by continuously drying the cathode feed gas to low moisture levels. Power generation configurations that minimize the energy penalty associated with cathode gas drying are also disclosed.

Description

technical field [0001] The invention relates to a fuel cell system. In particular, the present invention relates to the combination of a moisture removal system and an oxidant inlet of a solid oxide fuel cell (SOFC) system. Background technique [0002] A solid oxide fuel cell (SOFC) is a device that utilizes electrochemical reactions to generate energy, generally electrical energy, from various fuels. The migration of oxygen across the electrolyte, necessary for efficient energy conversion, is significantly accelerated at temperatures above 700 °C. The total efficiency of converting fuel into electricity in SOFC can be as high as 90%, which is not limited by the traditional thermodynamics of heat engine (Carnot cycle). Since solid oxide fuel cells produce high-temperature exhaust gases, SOFCs can simultaneously generate heat and electricity with a balance that favors electrical energy. The total system efficiency of hybrid power generation systems combining SOFCs and tur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M8/00H01M8/02H01M8/04H01M8/06H01M8/10H01M8/12
CPCH01M8/04156H01M8/04164Y02E60/50Y02E60/525H01M8/04029H01M2008/1293
Inventor K·W·布罗瓦尔C·巴兰N·S·哈里
Owner GENERAL ELECTRIC CO
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