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Cover Picture: Methanol Conversion to Aromatics over Ga–supported HZSM‐5 with Evolved Meso‐ and Microporosities by Desilication (ChemistrySelect 20/2016)
Author(s) -
Lai PoChen,
Chen ChaoHuang,
Lee ChiouHwang,
Lin YuChuan
Publication year - 2016
Publication title -
chemistryselect
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201601662
Subject(s) - alkalinity , aromatization , methanol , chemistry , catalysis , selectivity , cracking , xylene , ethylbenzene , chemical engineering , benzene , organic chemistry , engineering
The cover picture shows the structural hierarchy of Ga‐doped, desilicated ZSM‐5, an effective methanol aromatization catalyst. With a moderate alkalinity in desilication, both meso‐ and microporosities can be enhanced. Improved mesoporosity accelerates inward and outward diffusions in ZSM‐5 matrix: the former allows hexahydrated Ga 3+ transfer into cavities to form (GaO) + ‐Brønsted acid sites during impregnation, while the latter suppresses cracking by shortening residence time of yielded aromatics in ZSM‐5 channels. Micropores with a narrow pore size distribution can boost the selectivity for aromatics, such as o‐xylene, m‐xylene, and ethylbenzene. More information can be found in the Full Paper by Lai et al. (DOI: 10.1002/slct.201601292) (Design: Ms. Kai‐Li Chien, SHO SHO Design, Taipei).