Comparison of catalytic consequences of ionic liquid-templated ZSM-22 and ZSM-5 zeolites in propene dimerization

Xuemin Li, Tao Pan, Jungkyu Choi, Heon Park, Zhijie Wu, Alex C.K. Yip

Research output: Contribution to journalArticlepeer-review

Abstract

The ionic liquid-templated TON- and MFI-type zeolites having 10-membered rings were synthesized and their catalytic performances on propene dimerization were studied. The comparable acid site strength among TON- or MFI-type zeolites accounted for the nearly identical propene dimerization turnover rates despite their different Si/Al ratios. At the low propene conversion (<5%), the TON- and MFI-type zeolites (with a Si/Al ratio of 30–120) obtained a dimer selectivity of over 70% and less than 42%, respectively. The different channel structures and acid properties of zeolite were responsible for the different catalytic selectivity in TON- and MFI-type zeolites. Compared to MFI zeolite, TON with a smaller void size was much more suitable for stabilizing the transition states and intermediates for dimers under the reaction conditions. In addition, a three-stage and a three-in-one dimerization reaction pathways were proposed for the ZSM-22 and ZSM-5 zeolites, respectively.

Original languageEnglish
Article number111941
JournalMicroporous and Mesoporous Materials
Volume337
DOIs
Publication statusPublished - 2022 May

Keywords

  • Acid catalysis
  • Propene dimerization
  • Zeolite
  • ZSM-22
  • ZSM-5

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials

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