Lanthanide-promoted rhodium catalysts and process for...

C - Chemistry – Metallurgy – 01 – B

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C01B 3/38 (2006.01) B01J 23/63 (2006.01) C01B 3/40 (2006.01) B01J 35/04 (2006.01) B01J 37/02 (2006.01)

Patent

CA 2421013

Lanthanide-promoted rhodium-containing supported catalysts that are active for catalyzing the net partial oxidation of methane to CO and H2 are disclosed, along with their manner of making and high efficiency processes for producing synthesis gas employing the new catalysts. A preferred catalyst comprises highly dispersed, high surface area rhodium on a granular zirconia support with an intermediate coating of a lanthanide metal and/or oxide thereof and is thermally conditioned during catalyst preparation. In a preferred syngas production process a stream of methane-containing gas and O2 is passed over a thermally conditioned, high surface area Rh/Sm/zirconia granular catalyst in a short contact time reactor to produce a mixture of carbon monoxide and hydrogen.

L'invention concerne des catalyseurs supportés contenant du rhodium et à activité stimulée par lanthanide, qui sont actifs pour catalyser l'oxydation partielle nette du méthane en CO et H¿2?, ainsi que leur procédé de fabrication et des procédés de grande efficacité pour produire des gaz de synthèse faisant appel à ces nouveaux catalyseurs. Un catalyseur préféré comprend du rhodium hautement dispersé, à surface utile élevée sur un support de zircone granulaire, avec une couche intermédiaire de lanthanide et/ou d'un oxyde de ce dernier, et il est conditionné thermiquement durant sa préparation. Dans un procédé de production de gaz synthétique préféré, on fait passer un courant de gaz contenant du méthane et de l'O¿2? sur un catalyseur granulaire de Rh/Sm/zircone à surface utile élevée conditionné thermiquement, dans un réacteur à temps de contact bref, afin de produire un mélange de monoxyde de carbone et d'hydrogène.

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