期刊
JOURNAL OF CATALYSIS
卷 361, 期 -, 页码 135-142出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2018.02.032
关键词
Hierarchical ZSM-5; Dual-templating synthesis; Methanol-to-hydrocarbons
资金
- China Scholarship Council
- Netherlands Organization for Scientific Research (TOP grant)
- Netherlands Organization for Scientific Research (NWO-India grant)
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 Brensted acid sites, which contributes to the low rate of deactivation. (C) 2018 The Author(s). Published by Elsevier Inc.
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