Method for the catalytic conversion of gases with a high...

Details Method for the catalytic conversion of gases with a high... Method for the catalytic conversion of gases with a high...

C - Chemistry, Metallurgy

01

B

C01B 17/79 (2006.01) B01J 23/843 (2006.01) B01J 23/847 (2006.01) B01J 35/00 (2006.01) B01J 21/08 (2006.01) B01J 23/22 (2006.01)

Patent

CA 2408260

A gas mixture containing molecular oxygen and 15 to 60 vol. % SO2 flows through a first catalyst layer containing a catalyst containing vanadium pentoxide and immediately afterwards, through a second catalyst layer containing a catalyst containing iron. Said gas mixture is guided into the first catalyst layer at an entry temperature of 350 to 600 ~C, said first catalyst layer containing a granular V205 catalyst and 20 to 80 wt. % catalytically inactive inert material. Immediately afterwards, the gas mixture is guided into the second catalyst layer at a temperature of 500 to 750 ~C. The catalyst in the second catalyst layer preferably contains 3 to 30 wt. % arsenic oxide. The result is preferably a product gas containing SO3 with a SO2:SO3 volume ratio of at most 0.1.

Une mélange gazeux contenant de l'oxygène moléculaire et 15 à 60 % en volume de SO¿2? traverse une première couche de catalyseur qui renferme un catalyseur contenant un pentoxyde de vanadium, et immédiatement après une deuxième couche de catalyseur qui renferme un catalyseur contenant du fer. Le mélange gazeux est guidé à une température de 350 à 600 ·C dans la première couche de catalyseur qui renferme un catalyseur V2O5 granulaire et 20 à 80 % en poids d'un matériau inerte catalytiquement inactif. Immédiatement après, le mélange gazeux est guidé à une température de 500 à 750 ·C dans la deuxième couche de catalyseur. De préférence, le catalyseur de la deuxième couche de catalyseur contient 3 à 30 % en poids d'anhydride arsénique. On produit un gaz produit contenant du SO¿3? et ayant un rapport volumique SO¿2?: SO¿3? de maximum 0,1.

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