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Tuning Morphology of Zn/HZSM‐5 for Catalytic Performance in Methanol Aromatization
Author(s) -
Tian Haifeng,
Lv Jinlong,
Liang Xiaohu,
Tang Xiaohua,
Zha Fei
Publication year - 2018
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201800119
Subject(s) - catalysis , methanol , aromatization , zeolite , chemical engineering , silicon , materials science , selectivity , dissolution , zsm 5 , etching (microfabrication) , inorganic chemistry , chemistry , layer (electronics) , nanotechnology , organic chemistry , engineering , metallurgy
Catalytic performance is influenced by the morphology and assembly of catalyst particles. Therefore, Zn ion‐doped HZSM‐5 zeolite with different morphological structures is prepared using post‐treatments of selective dissolution and recrystallization, causing silicon components to migrate from the interior to the exterior in the different template etching processes. The core–shell, hollow, and hierarchical core–shell Zn/HZSM‐5 microspheres with weak acid sites on the external surfaces are successfully synthesized. Hierarchical core–shell‐structured Zn/HZSM‐5 microspheres with a silicon‐rich surface layer are prepared using an etching method in n ‐butylamine solution. Their catalytic activity is investigated in methanol aromatization. The functionalized morphological Zn/HZSM‐5 catalysts show good catalytic performance and the silicon‐rich surface layer improves selectivity of p ‐xylene in the reaction of methanol to aromatics.