Removal of carbon monoxide from a gas stream used in fuel cells, comprises feeding a gas stream impinged with carbon monoxide through a gas purification device, and removing the carbon monoxide by adsorption on the electrode

摘要

Carbon monoxide is removed from a gas stream by feeding a gas stream impinged with carbon monoxide through a gas purification device; and removing the carbon monoxide from the gas stream by adsorption on the working electrode (3). A current flow is passed between a working electrode and a counter electrode (4). The carbon monoxide is oxidized to carbon dioxide on the working electrode. An Independent claim is also included for a device for removing carbon monoxide from a gas stream comprising a membrane (2) having a working electrode (3) on one side and a counter electrode (4) spaced from the working electrode by the membrane. The working electrode contains a material which adsorbs carbon monoxide. The counter electrode has a region separated by the current flow formed as a reference electrode (5). Preferred Features: A constant electrical potential is applied to the reference electrode. The electrical potential is 1200-1700 mV.