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Effects of space velocity on coking deactivation of HZSM‐5 in methanol to propylene
Author(s) -
Yu Jing,
Qian Feng,
Wang Jiming
Publication year - 2019
Publication title -
asia‐pacific journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.348
H-Index - 35
eISSN - 1932-2143
pISSN - 1932-2135
DOI - 10.1002/apj.2354
Subject(s) - coke , catalysis , space velocity , methanol , thermogravimetric analysis , deposition (geology) , particle (ecology) , chemical engineering , chemistry , particle size , materials science , mineralogy , organic chemistry , geology , selectivity , paleontology , oceanography , sediment , engineering
The catalytic behavior of ZSM‐5 catalyst under different space velocities has been studied in methanol to propylene (MTP) reaction. The catalysts differed notably in deactivation behavior after the MTP conversion. This is ascribed to the difference in coke location, which was obtained via comparison of the difference in textural properties between the deactivated and regenerated catalysts and the thermogravimetric analysis of coke species. The catalyst deactivated in high space velocity showed a coke deposition on the outer surface of particle, whereas a coke distribution within the whole particle was observed for the catalyst deactivated in low space velocity. The diverging in coke location is arising from the different amount of CH provided by the methanol feeding in different space velocities, which resulted in the formation of different coke species.