Chromium-rare earth based catalysts and process for...

Details Chromium-rare earth based catalysts and process for... Chromium-rare earth based catalysts and process for...

C - Chemistry, Metallurgy

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C01B 3/40 (2006.01) B01J 23/00 (2006.01) B01J 23/10 (2006.01) B01J 23/26 (2006.01) B01J 23/86 (2006.01) C01B 3/38 (2006.01)

Patent

CA 2400082

Catalysts and processes for the catalytic conversion of hydrocarbons to carbon monoxide and hydrogen employing new families of chromium-rare earth based catalysts are disclosed. One highly active and selective catalyst system, providing greater than 95 % CH4 conversion, and 97-98 % selectivity to CO and H2 by a net catalytic partial oxidation reaction, is a Ce-Cr-Ni containing compound. A preferred process for the catalytic conversion of a hydrocarbon comprises contacting a feed stream comprising a methane-containing hydrocarbon feedstock and an oxygen-containing gas with a chromium-rare earth containing catalyst in a short contact time reactor maintained at partial oxidation promoting conditions effective to produce synthesis gas.

L'invention concerne des catalyseurs et des procédés de conversion catalytique d'hydrocarbures en monoxyde de carbone et en hydrogène, utilisant de nouvelles familles de catalyseurs à base de chrome-terres rares. L'invention a trait à un système de catalyseurs hautement actifs et sélectifs procurant plus de 95 % de conversion de CH¿4? et une sélectivité de 97-98 % vis-à-vis du CO et de H¿2? par une réaction d'oxydation catalytique partielle nette, et constitué d'un composé contenant Ce-Cr-Ni. Un procédé préféré de conversion catalytique d'un hydrocarbure consiste à mettre un flux d'alimentation, contenant une charge d'alimentation hydrocarbure contenant du méthane et un gaz contenant de l'oxygène, en contact avec un catalyseur contenant du chrome-des terres rares dans un réacteur à temps de contact court maintenu dans des conditions favorisant une oxydation partielle efficace pour produire du gaz de synthèse.

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