A dual-templating synthesis strategy to hierarchical ZSM-5 zeolites as efficient catalysts for the methanol-to-hydrocarbons reaction

Lingqian Meng, Xiaochun Zhu, Wannaruedee Wannapakdee, Robert Pestman, Maarten G. Goesten, Lu Gao, Arno J.F. van Hoof, Emiel J.M. Hensen

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21 Citations (Scopus)
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Abstract

A novel dual-templating synthesis strategy is presented to obtain hierarchical ZSM-5 zeolite using a combination of known structure-directing agents for ZSM-5 synthesis and C16H33-[N+-methylpiperidine] (C16MP) as mesoporogen. C16MP is a cheap surfactant, which can be obtained in a single step by alkylation of N-methylpiperidine. The zeolite materials were extensively characterized for their textural and acidic properties and evaluated on the basis of their ability to convert methanol to hydrocarbons. Bulk and nanosheet (di-quaternary ammonium surfactant) ZSM-5 zeolites served as reference materials. Hierarchical ZSM-5 zeolite can be obtained in this way with diethylamine, n-propylamine, 1,4-diaminobutane, 1,6-diaminohexane. In particular, the combination with diethylamine afforded a material that displayed similar performance in the methanol-to-hydrocarbons reaction as nanosheet ZSM-5. The optimum ZSM-5 zeolite is highly crystalline, contains a large mesopore volume and few silanol groups and external Brønsted acid sites, which contributes to the low rate of deactivation.

Original languageEnglish
Pages (from-to)135-142
Number of pages8
JournalJournal of Catalysis
Volume361
DOIs
Publication statusPublished - 1 May 2018

Keywords

  • Dual-templating synthesis
  • Hierarchical ZSM-5
  • Methanol-to-hydrocarbons

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