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Propane Aromatization Tuned by Tailoring Cr Modified Ga/ZSM‐5 Catalysts
Author(s) -
Xu Bing,
Tan Minghui,
Wu Xuemei,
Geng Hailun,
Zhao Shengying,
Yao Jie,
Ma Qingxiang,
Yang Guohui,
Tsubaki Noritatsu,
Tan Yisheng
Publication year - 2021
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.202100491
Subject(s) - dehydrogenation , aromatization , catalysis , propane , zsm 5 , chemistry , inorganic chemistry , photochemistry , zeolite , organic chemistry
Accelerating propane dehydrogenation in propane aromatization is vital because it is the first and rate control step. In this study, we introduced Cr to Ga/ZSM‐5 by tuning its impregnation sequence and amount, which was expected to accelerate the dehydrogenation step and improve aromatization performance. The impregnation sequence of Cr on catalyst not only affected the interaction between Ga and ZSM‐5, but also tuned the amount of dehydrogenation active species Cr 3+ . Due to the plenty of Cr 3+ species and strong interaction between Ga species and ZSM‐5, 2Cr/GaZ5 catalyst accelerated the dehydrogenation step and improved the aromatization process. More light hydrocarbons were preferred to be produced and were further converted into BTX on 2Cr/GaZ5 catalyst. Excessive Cr on catalyst caused the formation of Cr 2 O 3 particles with worse dispersion. The aggregated Cr 2 O 3 decreased the strong acidity of catalyst, which could not further promote propane conversion and decreased the aromatization ability of catalyst.