Catalysts for the selective oxidation of carbon monoxide in...

C - Chemistry – Metallurgy – 01 – B

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C01B 3/58 (2006.01)

Patent

CA 2344449

The invention relates to a method for the selective catalytic oxidation of carbonmonoxide (CO) in H2-rich, CO2- and H2-containing gases in the presence of a noble metal catalyst on an alumina carrier with the addition of air as oxidising agent. According to the invention, with this method .alpha.-A12O3 is used as carrier material. The specific surface area of the .alpha.-A12O3 carrier can be less than 25 m2/gram. The noble metal can be ruthenium or platinum and preferably a combination of ruthenium (Ru) and platinum (Pt), the sum of the quantities of RU and Pt being less than or equal to 1.0 % (m/m).

L'invention concerne un procédé d'oxydation catalytique sélective de monoxyde de carbone (CO) dans des gaz riches en H¿2?, ou contenant CO¿2?- et H¿2?-, en présence d'un catalyseur de métal noble sur support d'alumine, et au moyen d'un ajout d'air en tant qu'agent d'oxydation. Selon l'invention, on utilise dans ce procédé .alpha.-Al¿2?-O¿3? en tant que matériau de support, la surface spécifique du support .alpha.-Al¿2?O¿3? pouvant être inférieure à 25 m?2¿/g. Le métal noble peut être du ruthénium ou du platine, et de préférence, une combinaison de ruthénium (Ru) et de platine (Pt), la somme des quantités de Ru et de Pt étant inférieure ou égale à 1,0 % (m/m).

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