The effect of the Ce content on the oxidative dehydrogenation of propane over CrOy-CeO2/γ-Al2O3 catalysts

Cheng Zuo; Man Wu; Qingjie Guo

doi:10.1016/j.cjche.2020.04.022

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The effect of the Ce content on the oxidative dehydrogenation of propane over CrO_y-CeO₂/γ-Al₂O₃ catalysts

Catalysis, Kinetics and Reaction Engineering | Updated：2026-01-06

- The effect of the Ce content on the oxidative dehydrogenation of propane over CrO_y-CeO₂/γ-Al₂O₃ catalysts
- The effect of the Ce content on the oxidative dehydrogenation of propane over CrO_y-CeO₂/γ-Al₂O₃ catalysts
- 中国化学工程学报（英文版） 2020年28卷第12期页码：3035-3043
- Affiliations：
  
  1. Key Laboratory of Clean Chemical Processing of Shandong Province, College of Chemical Engineering, Qingdao University of Science and Technology,Qingdao,China,266042
  2. State Key Laboratory of High-efficiency Coal Utilization and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University,Yinchuan,China,750021
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2020.04.022
  中图分类号：
- 纸质出版：2020
- Accepted：
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Cheng Zuo, Man Wu, Qingjie Guo. The effect of the Ce content on the oxidative dehydrogenation of propane over CrO_y-CeO₂/γ-Al₂O₃ catalysts[J]. 中国化学工程学报（英文版）, 2020,28(12):3035-3043. DOI: 10.1016/j.cjche.2020.04.022.

-CeO
Cheng Zuo, Man Wu, Qingjie Guo. The effect of the Ce content on the oxidative dehydrogenation of propane over CrO_y-CeO₂/γ-Al₂O₃ catalysts[J]. 中国化学工程学报（英文版）, 2020,28(12):3035-3043. DOI: 10.1016/j.cjche.2020.04.022. DOI：

-CeO DOI： 10.1016/j.cjche.2020.04.022.

摘要

Abstract

A series of CrO

(17.5 wt%)-CeO

(

wt%)/

-Al

catalysts (

0.5

8) with various Ce contents were prepared by a wetness impregnation method and were applied to the dehydrogenation of propane to propylene at 550℃ and 0.1 MPa. The prepared catalysts were characterized by BET

-TPR

-TPD

XPS

XRD

SEM-EDS and Raman spectroscopy. Among the prepared catalysts

the 17.5Cr-2Ce/Al catalyst with the largest amount of lattice oxygen exhibited the best catalytic performance for the dehydrogenation of propane to propylene with lattice oxygen. The decreased presence of oxygen defects and reducibility were the factors responsible for the improved dehydrogenation activity of the catalysts. The CeO

layer could inhibit the evolution of lattice oxygen (O

) to electrophilic oxygen species (O

)

and the oxygen defects on the catalyst surface were reduced. The inhibited lattice oxygen evolution prevented the deep oxidation of propane or propylene

the average CO

selectivity decreased from 24.41% (17.5Cr/Al) to 5.71% (17.5Cr-2Ce/Al)

and the average propylene selectivity increased from 60.15% (17.5Cr/Al) to 85.05% (17.5Cr-2Ce/Al).

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