Heterogeneous, composite, carbonaceous catalyst system and...

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B01J 23/52 (2006.01) B01D 53/86 (2006.01) B01D 53/94 (2006.01) B01J 20/20 (2006.01) B01J 32/00 (2006.01) B01J 35/10 (2006.01) B01J 37/02 (2006.01)

Patent

CA 2593006

Heterogeneous catalyst systems, methods of making these systems, and methods of using these systems, wherein catalytically active gold is deposited onto composite support media. The composite support media is formed by providing nanoporous material on at least a portion of the surfaces of carbonaceous host material. In representative embodiments, relatively fine, nanoporous guest particles are coated or otherwise provided on surfaces of relatively coarser activated carbon particles. Catalytically active gold may be deposited onto one or both of the guest or host materials either before or after the guest and host materials are combined to from the composite host material. PVD is the preferred catalyst system of depositing gold.

L'invention concerne des systèmes de catalyse hétérogènes, des procédés de fabrication de ces systèmes et des procédés d'utilisation de ces systèmes. De l'or actif sur le plan catalytique est déposé sur des milieux de support composites. Pour former les milieux de support composites, on dispose un matériau nanoporeux sur au moins une partie des surfaces en matériau hôte carboné. Dans des modes de réalisation représentatifs, des particules trace nanoporeuses relativement fines sont revêtues ou disposées sur des surfaces de particules de charbon actif relativement plus grossières. De l'or actif sur le plan catalytique peut être déposé sur le matériau trace et/ou le matériau hôte avant ou après que ceux-ci sont combinés afin de former le matériau hôte composite. Le PVD est le système de catalyse préféré permettant de déposer de l'or.

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