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Effects of Enhancing Micromixing on Nucleation/Crystal Growth Process and Material Properties of Zeolite
  • +7
  • Tingting Qi,
  • Jing Shi,
  • Xishuo Wang,
  • Kun Dong,
  • Yong Luo,
  • Jiawei Teng,
  • Guang-Wen Chu,
  • Liangliang Zhang,
  • Hai-Kui Zou,
  • Baochang Sun
Tingting Qi
Beijing University of Chemical Technology College of Chemical Engineering
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Jing Shi
State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, SINOPEC Shanghai Research Institute of Petrochemical Technology, Shanghai 201208, China
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Xishuo Wang
Beijing University of Chemical Technology College of Chemical Engineering
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Kun Dong
Beijing University of Chemical Technology College of Chemical Engineering
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Yong Luo
Beijing University of Chemical Technology College of Chemical Engineering
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Jiawei Teng
State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, SINOPEC Shanghai Research Institute of Petrochemical Technology, Shanghai 201208, China
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Guang-Wen Chu
Beijing University of Chemical Technology College of Chemical Engineering
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Liangliang Zhang
Beijing University of Chemical Technology College of Chemical Engineering
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Hai-Kui Zou
Beijing University of Chemical Technology College of Chemical Engineering
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Baochang Sun
Beijing University of Chemical Technology College of Chemical Engineering
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Peer review status:UNDER REVIEW

20 Jun 2020Submitted to AIChE Journal
25 Jun 2020Assigned to Editor
25 Jun 2020Submission Checks Completed
28 Jun 2020Reviewer(s) Assigned

Abstract

Hierarchical (micro/mesopore) ZSM-5 zeolites were hydrothermally synthesized with enhancing micromixing of the high viscosity reaction system in a rotating packed bed (RPB). Herein, the effects of four operating processes with different micromixing intensity on nucleation/crystal growth process as well as properties of ZSM-5 zeolites were investigated. Results indicated that enhancing micromixing by RPB in the zeolite synthesis could facilitate the formation of Al sites and shorten the nucleation and crystallization period. ZSM-5 samples prepared by the RPB premix process exhibit hierarchical structure, smaller average particle size, more uniform particle size distributions, larger specific surface areas, higher catalytic stability as well as more Brønsted and Lewis acid sites. While adopting the prepared ZSM-5 zeolites with RPB premix for catalyzing C4-olefin cracking reaction, the conversion of C4-olefin and yield of propylene were higher than that obtained by traditional stirring tank reactor premix.