Molecular shape selectivity of ZSM-5, modified ZSM-5 and ZSM-11 type zeolites

摘要: In order to ascertain the relative importance of different shape-selective effects in the conversion of methanol to higher hydrocarbons on Pentasil-family zeolites, several catalysts were used in the present investigation of the methanol conversion and alkylation of p-xylene by methanol. These catalysts are ZSM-5 zeolites, differing in their acidification pretreatments, modified by the incorporation of phosphorus, or embedded in a silica filler. H-ZSM-5 and H-ZSM-11 zeolites with very similar Al contents and particle sizes were also …