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Honda Giken Kogyo Kabushiki Kaisha

Mitsubishi Gas Chemical Company, Inc.

Osamu Usaka

Takahiro Naka

Shoji Isobe

Katsumi Kurabayashi

Masako Takayama

Takashi Itoh

Takashi Ito

Yasushi Hiramatsu

Mikio Yoneoka

In a reforming catalyst apparatus provided with a reforming catalyst for forming a hydrogen rich reformed gas by a reforming reaction of the fuel with water, the catalyst performance can be recovered by heating the catalyst within a temperature ranging from 500&#xb0; C. to 800&#xb0; C. while supplying said fuel and air to the catalyst. This method allows recovery of the catalyst performance without demounting the catalyst from the reforming catalyst apparatus and allows providing the reforming catalyst with a long service life.

Catalyst performance recovery method for reforming catalyst apparatus

A catalyst for selective oxidation of carbon monoxide present in a hydrogen-containing gas is provided in which the catalyst comprises ruthenium supported on an alumina hydrate. This catalyst has a high selective oxidation activity to carbon monoxide. A carbon monoxide elimination method using this catalyst is also provided. In this method, to a gas containing at least hydrogen and carbon monoxide and being richer in the hydrogen than the carbon monoxide on the basis of volume, oxygen is added in an amount necessary for oxidizing at least part of carbon monoxide present in that gas, and thereafter the gas to which the oxygen has been added is brought into contact with the catalyst described above. Also provided is a solid polymer electrolyte fuel cell system that utilizes this method.

CATALYST FOR SELECTIVE OXIDATION OF CARBON MONOXIDE PRESENT IN HYDROGEN-CONTAINING GASES, AND ELIMINATION OF CARBON MONOXIDE AND SOLID POLYMER ELECTROLYTE FUEL CELL SYSTEM WHICH MAKE USE OF THE CATALYST

Catalyst for selective oxidation and elimination of carbon monoxide present in hydrogen-containing gases

A catalyst for selectively oxidizing carbon monoxide in a hydrogen-containing gas comprises an alumina hydrate carrier and at least platinum supported thereon. With an aluminum hydrate as a carrier, the catalyst is resistant to deactivation which would be caused by an oxygen-containing hydrocarbon in a hydrogen-rich gas. The method for selectively removing carbon monoxide comprises the steps of adding oxygen to a hydrogen-rich gas containing carbon monoxide, in an amount necessary to oxidize at least part of carbon monoxide, and bringing the resulting mixture into contact with the catalyst for selectively oxidizing carbon monoxide. The solid polymer electrolyte-type fuel cell system utilizes the above method for selectively removing carbon monoxide.

Catalyst and method for selectively oxidizing carbon monoxide in hydrogen-containing gas and solid polymer electrolyte-type fuel cell system using such catalyst

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Utsunomiya, Japan

Osamu Usaka