N-Heptane hydroconversion and methylcyclohexane cracking as model reactions to investigate the pore topology of NU-88 zeolite

摘要

The n-heptane hydroconversion is a useful and simple tool to get primary ideas on thernpore topology of new zeolites, although a more precise investigation requires the use ofrnmore complex molecules. This model reaction was used to investigate the porerntopology of NU-88 zeolite. By working on the rate of appearance of the products and onrnthe composition of the monobranched, multibranched isomers and cracked products, itrncould be proposed that NU-88 zeolite contains 10 MR channels with large internal voidrnspaces, which could be intersections of 10 MR channels or extra-cavities. The resultsrnwere complemented with a methycyclohexane cracking test, where the importance ofrnhydrogen transfer reactions helped to confirm the presence of large cavities.