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Preparation of ZSM‐5 Coated on Monolithic Interconnected Macroporous Al 2 O 3 Using Cheap n ‐Butylamine as Template
Author(s) -
Sun Mingliang,
Zhao Tianbo,
Wang Jia,
Ma Zhaofei,
Li Fengyan
Publication year - 2015
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201500369
Subject(s) - crystallinity , chemistry , scanning electron microscope , butylamine , fourier transform infrared spectroscopy , hydrothermal circulation , microporous material , zsm 5 , infrared spectroscopy , hydrothermal synthesis , chemical engineering , desorption , adsorption , porosity , nuclear chemistry , analytical chemistry (journal) , crystallography , molecular sieve , materials science , organic chemistry , composite material , amine gas treating , engineering
Using cheap n ‐butylamine as template, ZSM‐5 zeolites have been successfully synthesized and coated on monolithic interconnected macroporous Al 2 O 3 by the secondary growth method. The use of cheap n ‐butylamine could significantly reduce the synthesis cost. Hierarchical monolithic ZSM‐5 zeolites were prepared from synthetic mixtures with different H 2 O/Na 2 O or SiO 2 /Al 2 O 3 ratio. The synthesized samples were characterized by scanning electron microscopy (SEM), X‐ray diffraction (XRD), Fourier transform infrared spectroscopy (FT‐IR) and N 2 adsorption‐desorption. The results show that the hierarchical monolithic zeolites were obtained with cheap n ‐butylamine template as template. During the hydrothermal reaction process, the morphology of the micrometer‐sized support was well maintained. The irregular crystals were formed in a wide range of the H 2 O/Na 2 O or SiO 2 /Al 2 O 3 ratio of synthetic mixtures and coated on monolithic Al 2 O 3 . The relative crystallinity of the zeolites was highest at H 2 O/Na 2 O=250 or SiO 2 /Al 2 O 3 =160. This type of composites exhibited hierarchical porous structures and relatively high specific surface areas.