High-porosity foam ceramics as catalyst carriers used for...

B - Operations – Transporting – 01 – J

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B01J 23/14 (2006.01) B01J 23/26 (2006.01) B01J 23/42 (2006.01) B01J 37/02 (2006.01) C04B 38/10 (2006.01) C07C 5/32 (2006.01)

Patent

CA 2733278

The invention relates to a material which is suited as a carrier for catalysts in the dehydrogenation of alkanes and in the oxidative dehydrogenation of alkanes and which is made of an oxide ceramic foam and may contain combinations of the substances aluminium oxide, calcium oxide, silicon dioxide, tin oxide, zirconium dioxide, calcium aluminate, zink aluminate, silicon carbide, and which is impregnated with one or several suitable catalytically active materials, by which the flow resistance of the catalyst decreases to a considerable degree and the accessibility of the catalytically active material improves significantly and the thermal and mechanical stability of the material increases. The invention also relates to a process for the manufacture of the material and a process for the dehydrogenation of alkanes by using the material according to the invention.

La présente invention concerne un matériau qui est conçu pour pouvoir être utilisé comme support catalytique lors de déshydrogénations d'alcanes et lors de déshydrogénations oxydatives d'alcanes et qui est travaillé sous forme de mousse céramique oxydée et non oxydée. Ledit matériau peut contenir de l'oxyde d'aluminium, de l'oxyde de calcium, du dioxyde de silicium, de l'oxyde d'étain, du dioxyde de zirconium, de l'aluminate de calcium, de l'aluminate de zinc, du carbure de silicium et du nitrure de bore combinés et il est imprégné d'un ou de plusieurs matériaux catalytiquement actifs adaptés, grâce auxquels la résistance à l'écoulement du catalyseur est considérablement réduite et l'accessibilité du matériau catalytiquement actif est considérablement améliorée, tout comme la stabilité thermique et mécanique du matériau. L'invention concerne également un procédé pour produire ce matériau et un procédé pour réaliser la déshydrogénation d'alcanes avec le matériau selon l'invention.

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