Where and how shape selectivity of molecular sieves operates in refining and petrochemistry catalytic processes

Zeolites play an important role in many catalytic processes of modern refining and petrochemistry. Their shape selectivity is always a key factor and here we look at the ways it operates in the principal processes either industrialized or with a good industrial potential: cracking, hydrocracking, isomerization of short or long paraffins and of butene, aromatic transformations by isomerization, disproportionation/transalkylation, and alkylations. This revised version was published online in June 2006 with corrections to the Cover Date.