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Solvent‐Free Synthesis of c ‐Axis Oriented ZSM‐5 Crystals with Enhanced Methanol to Gasoline Catalytic Activity
Author(s) -
Liu Ziyu,
Wu Dan,
Ren Shu,
Chen Xinqing,
Qiu Minghuang,
Wu Xian,
Yang Chengguang,
Zeng Gaofeng,
Sun Yuhan
Publication year - 2016
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201600896
Subject(s) - crystallinity , methanol , zsm 5 , catalysis , solvent , zeolite , chemical engineering , chemistry , materials science , adsorption , organic chemistry , crystallography , engineering
ZSM‐5 crystals with controllable c ‐axis length were successfully synthesized through a one‐pot solvent‐free route, with urea as an additive. X‐ray diffraction patterns (XRD) show that the prepared samples exhibit high crystallinity. N 2 adsorption–desorption isotherms and mercury intrusion porosimetry (MIP) analysis together with TEM observations indicate that micro‐, meso‐, and macropores exist in the obtained samples. Catalytic tests for the methanol to gasoline (MTG) conversion showed that the prepared c ‐axis oriented hierarchical ZSM‐5, which allow fast mass transfer, exhibited both 100 % methanol conversion and far longer lifetime (900 h) than those of ZSM‐5 with conventional morphology (350 h) in the MTG reaction. The enhanced MTG performance by the c ‐axis oriented zeolite under one‐pot solvent‐free synthesis is of great importance as it is easily scaled‐up for industrial applications.