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Effect of redox atmosphere treatment on bifunctional Ga/ZSM-5 for efficient catalytic cracking of n-butane
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  • Zenan Ni,
  • Yuming Li,
  • Yaoyuan Zhang,
  • Yajun Wang,
  • Guoqing Cui,
  • Guiyuan Jiang,
  • zhen Zhao,
  • Chunming Xu
Zenan Ni
China University of Petroleum Beijing

Corresponding Author:15242309171@163.com

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Yuming Li
China University of Petroleum Beijing
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Yaoyuan Zhang
China University of Petroleum Beijing
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Yajun Wang
China University of Petroleum, Beijing
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Guoqing Cui
China University of Petroleum Beijing
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Guiyuan Jiang
China University of Petroleum, Beijing
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zhen Zhao
China University of Petroleum, Beijing
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Chunming Xu
Chinese University of Petroleum
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Abstract

Ga species with high dehydrogenation capability were prepared by H2-O2 atmosphere treatment, and efficient matching of bifunctionality (dehydrogenation/cracking) was realized between Ga species and ZSM-5 over Ga/ZSM-5 based catalysts. Compared with parent Ga/ZSM-5, the conversion rate of n-butane was increased from 0.53 to 2.59 mmol·g-1·min-1 on Ga/ZSM-5 with H2-O2 treatment. Kinetic analysis revealed that the apparent activation energy of n-butane catalytic cracking decreased largely from 141 to 47 kJ·mol-1, which is attributed to the formation of new interaction between Ga species and ZSM-5 upon such an atmosphere treatment. It was also found butane-O2 treatment acts as a similar role with H2-O2 treatment in enhancing the catalytic performance. On this basis, different Ga species were correlated with activity and kinetic data, and the effect of practical reaction atmosphere on Ga species was also investigated.
Dec 2021Published in Chemical Engineering Science volume 245 on pages 116856. 10.1016/j.ces.2021.116856