Les phyllosilicates de sodium dlamins: Nouveaux supports catalytiques acides (Omn.Pres.Franc.) (French Edition),Used

Les phyllosilicates de sodium dlamins: Nouveaux supports catalytiques acides (Omn.Pres.Franc.) (French Edition),Used

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SKU: DADAX383817075X
UPC: 9783838170756
Brand: Omniscriptum
Condition: New
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En industrie ptrolire, lamlioration du craquage des hydrocarbures ncessite des centres acides forts, et les zolithes sont de ce point de vue de meilleurs catalyseurs du craquage catalytique que les autres aluminosilicates. Cependant le craquage dune molcule encombrante est encore gn par la petite taille poreuse des cavits zolitiques. Un peu plus tard, lorsque les matriaux MCM41 ont t dcouverts, beaucoup d'espoir a t plac dans leur utilisation en tant que catalyseurs de craquage, parce que leur grande taille de pore pourrait permettre le craquage des molcules volumineuses. Cependant, il est rapidement devenu clair que leur acidit est plus proche dune silicealumine amorphe que des zolithes. Dans cet ouvrage, nous prsentons des nouveaux matriaux alternatifs dvelopps partir de la dlamination des silicates lamellaires naturelles du type magadiite et knyaite. Ces nouveaux matriaux prsentent en mme temps les avantages des zolithes et ceux des MCM41 en jouissant dune haute surface spcifique, d'une acidit leve, et d'une porosit ouverte.

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