IMPACT OF ACCESSIBILITY AND ACIDITY OIL NOVEL MOLECULAR-SIEVES FOR CATALYTIC CRACKING OF HYDROCARBONS

The catalytic properties of extra-large pore aluminosilicate MCM-41, s ilicon containing VPI-5 and aluminium containing ETS-10 were investiga ted by MAT (Micro Activity Test) using n-hexadecane and 1,3,5-triisopr opylbenzene as the model feeds and were then compared with the results obtained from Y zeolite in the I-I-form and a commercial FCC (Fluid C atalytic Cracking) catalyst. It could be demonstrated that not only th e acidic properties of the investigated materials, but also the access ibility to the internal active sites of the investigated materials hav e a significant influence on activity and selectivity. It can be assum ed that, by optimising structural and chemical properties, the mesopar ously organised MCM-41 and related materials are suitable as active co mponents in cracking catalysts for ''deeper'' cracking of high boiling hydrocarbons.