Journal
CATALYSIS TODAY
Volume 316, Issue -, Pages 91-98Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cattod.2018.01.015
Keywords
ZnZSM-5; Direct synthesis; Seed-induced crystallization; CTAB; Methanol to aromatics
Funding
- National Natural Science Foundation of China [21276183]
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A series of ZnZSM-5 zeolites with hierarchical pores were prepared by a seed-induced method with the addition of cetyltrimethylammonium bromide (CTAB). The influence of the amounts of CTAB on the physicochemical properties of the zeolites was investigated by XRD, FTIR, SEM, TEM, N-2 adsorption and desorption, ICP-OES, XPS, NH3-TPD and TG analysis. The results showed that Zn was partially incorporated in the zeolite framework; the addition of CTAB in the synthesis reduced the primary crystal size of the zeolite, but increased the specific surface area and mesopore volume. The catalytic performance of the prepared zeolites was evaluated for methanol to aromatics reaction in a fixed bed reactor. The lifetime of the catalysts was greatly enhanced by the addition of CTAB in the synthesis. The incorporation of Zn increased the selectivity of aromatics.
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