Fuel cell system with degradation protected anode

Details Fuel cell system with degradation protected anode Fuel cell system with degradation protected anode

H - Electricity

01

M

H01M 8/00 (2006.01) H01M 8/04 (2006.01) H01M 8/06 (2006.01)

Patent

CA 2493473

The present invention provides a method of operating a fuel cell including an anode, a cathode, a first passage, and a second passage, wherein the anode is disposed in the first passage and the cathode is disposed in the second passage, comprising: producing a non-explosive gaseous feed consisting of (i) at least one oxidizable component having a greater tendency to undergo oxidation relative to the anode, and (ii) a remainder, wherein the remainder is the predominant component in the gaseous feed and consists essentially of water vapor, and introducing the non-explosive gaseous feed to the first passage to form a first gaseous feed stream flowing through the first passage when the anode realizes a temperature effective to facilitate deteriorative oxidation of the anode in the presence of an oxidizing agent. The non- explosive gaseous feed is provided to mitigate or prevent anode oxidation and to mitigate or prevent the formation of potentially explosive gaseous mixtures. Additionally, the non-explosive gaseous feed can provide a source of steam for reforming.

L'invention concerne un procédé de fonctionnement d'une pile à combustible comportant une anode, une cathode, un premier et un second passages. L'anode est placée dans le premier passage et la cathode dans le second passage. Ledit procédé consiste à assurer une alimentation gazeuse non explosive comprenant (i) au moins un composant oxydable ayant une plus grande tendance à l'oxydation par rapport à l'anode, et (ii) un résidu qui est le composant prédominant de l'alimentation gazeuse se composant essentiellement de vapeur d'eau, et à introduire l'alimentation gazeuse non explosive dans le premier passage pour former un premier courant d'alimentation gazeuse traversant le premier passage lorsque l'anode atteint une température qui favorise une oxydation altérante de l'anode en présence d'un agent oxydant. L'alimentation gazeuse non explosive permet d'atténuer ou d'empêcher l'oxydation de l'anode ou la formation de mélanges gazeux potentiellement explosifs. En outre, l'alimentation gazeuse non explosive peut assurer une source de vapeur destinée au reformage.

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