Chromium-based catalysts and processes for converting...

C - Chemistry – Metallurgy – 01 – B

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C01B 3/40 (2006.01) B01J 23/10 (2006.01) B01J 23/26 (2006.01) B01J 23/68 (2006.01) B01J 23/86 (2006.01) B01J 37/32 (2006.01) C01B 3/38 (2006.01)

Patent

CA 2400046

Processes for the catalytic conversion of hydrocarbons to carbon monoxide and hydrogen employing new chromium-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, is a chromium-containing catalyst consisting of a CoCr2O4 cubic spinel precursor dispersed in a chromium oxide matrix. Some other preferred catalysts compositions comprise nickel-chromium containing and rare earth-chromium containing compounds.

L'invention concerne des procédés destinés à la conversion catalytique d'hydrocarbures en monoxyde de carbone et en hydrogène utilisant des nouveaux catalyseurs à base de chrome. Un système catalytique hautement actif et sélectif, qui permet d'obtenir une conversion de CH¿4? supérieure à 95 % et une sélectivité de l'ordre de 97-98 % par rapport à CO et H¿2?, est formé par un catalyseur contenant du chrome constitué par un précurseur de spinelles cubiques CoCr¿2?O¿4? dispersé dans une matrice d'oxyde de chrome. D'autre compositions catalytiques préférées comprennent des composés contenant du nickel-chrome et des composés contenant du chrome des terres rares.

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