Desulfurizing agent and method of desulfurization with the same

C - Chemistry – Metallurgy – 10 – G

Patent

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C10G 25/00 (2006.01) B01J 20/06 (2006.01) B01J 20/28 (2006.01) B01J 20/30 (2006.01) C01B 3/38 (2006.01) C10G 29/04 (2006.01) C10G 29/06 (2006.01) C10G 29/16 (2006.01) C10L 3/10 (2006.01) H01M 8/06 (2006.01)

Patent

CA 2601124

A desulfurizing agent with which sulfur components contained in a raw hydrocarbon and/or oxygenous raw hydrocarbon can be efficiently removed to an extremely low concentration and which has a long life and is industrially advantageous; a process for producing hydrogen for fuel cells which comprises subjecting a raw hydrocarbon and/or oxygenous raw hydrocarbon desulfurized with the desulfurizing agent to steam reforming, partial-oxidation reforming, or autothermal reforming; and a fuel cell system employing the hydrogen produced by the process. The desulfurizing agent, which is for removing sulfur compounds from a raw hydrocarbon and/or oxygenous raw hydrocarbon, comprises silicon and either nickel or nickel and copper and has a bulk density of 0.95- 2.0 g/cm3, pore volume of 0.10- 0.40 ml/g, micropore surface area of 100-250 m2/g, and external-surface area of 100 m2/g or smaller. The process for producing hydrogen for fuel cells employs the desulfurizing agent.

L~invention concerne un agent de désulfuration grâce auquel les composants soufrés contenus dans un hydrocarbure brut et/ou un hydrocarbure brut oxygéné peuvent être efficacement éliminés jusqu~à une concentration extrêmement faible, ledit agent ayant une longue durée de vie et présentant des avantages sur le plan industriel. L~invention concerne également un procédé de production d~hydrogène pour des piles à combustible, ledit procédé comprenant la soumission d~un hydrocarbure brut et/ou un hydrocarbure brut oxygéné, désulfuré grâce à l~agent de désulfuration, à un reformage à la vapeur, un reformage par oxydation partielle ou un reformage autotherme. Enfin, l~invention concerne un système à pile à combustible utilisant l~hydrogène produit par le procédé. L~agent désulfurant de l~invention comprend du silicium et soit du nickel, soit du nickel et du cuivre, et il présente une densité apparente de 0,95 à 2,0 g/cm3, un volume de pores de 0,10 à 0,40 ml/g, une aire de surface de micropores de 100 à 250 m2/g, et une aire de surface extérieure de 100 m2/g maximum. Le procédé de production d~hydrogène pour les piles à combustibles utilise l~agent de désulfuration.

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