Zeolite membranes for selective oxidation of carbon monoxide...

B - Operations – Transporting – 01 – J

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B01J 19/24 (2006.01) B01D 71/02 (2006.01) B01J 29/12 (2006.01) B01J 35/06 (2006.01) C01B 3/50 (2006.01) C01B 3/58 (2006.01)

Patent

CA 2418007

ABSTRACTMethods and apparatus are taught for selectively oxidizing carbon monoxide in a source of gas containing carbon monoxide and hydrogen. A gas containing carbon monoxide and hydrogen is fed into a membrane reactor (10, 50, 60) capable of selectively absorbing the carbon monoxide. Preferably, the reactor comprises a substantially defect-free zeolite membrane (4) having at one metal that acts as an oxidation catalyst. The zeolite membrane (4) may be supported on a porous ceramic support (2, 52, 61) and the average pore diameter is preferably between about 0.3nm and about 1.0nm. Moreover, the substantially defect-free zeolite membrane (4) preferably has a thickness between about 0.1 micron and about 50.0 microns. The at least one metal is preferably capable of selectively oxidizing the carbon monoxide and is preferably platinum. Preferably, the temperature of reactor housing is maintained at about 200-300 degrees centigrade.

L'invention concerne des procédés et dispositifs d'oxydation sélective du monoxyde de carbone, dans une source de gaz contenant du monoxyde de carbone et de l'hydrogène. Le procédé consiste à acheminer un gaz contenant du monoxyde de carbone et de l'hydrogène dans un réacteur à membrane (10, 50, 60) capable d'absorber de manière sélective le monoxyde de carbone. De préférence, ce réacteur comprend une membrane à base de zéolithe (4), sensiblement dépourvue de défauts et comportant un métal agissant en tant que catalyseur d'oxydation. Cette membrane (4) peut être sur support céramique poreux (2, 52, 61), et le diamètre moyen de ses pores se situe, de préférence, entre environ 0,3 et environ 1,0 nm. En outre, cette membrane (4) possède préférablement une épaisseur de l'ordre d'environ 0,1 à environ 50,0 microns. De préférence, le métal est capable d'oxyder de manière sélective le monoxyde de carbone et il est du platine, la température du logement du réacteur étant maintenue entre environ 200 et 300· C.

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