Ultralow Content of Chromium Species in Zeolite for Efficient Catalytic Propane Dehydrogenation

Supported chromia catalysts have been commercially used in propane dehydrogenation, which relies on Cr loading at weight fractions of up to 20 wt %. This leads to problems in managing spent catalysts with a high content of toxic chromium species. These catalysts also rapidly deactivate within 10-15 min, requiring frequent regeneration in each cycle. To overcome these problems, we developed a siliceous MFI zeolite with an ultralow Cr content (e.g., 0.09 wt %) that exhibits high activity and durability for propane dehydrogenation. A mechanism study revealed that the chromic hydroxyl species readily dissociated the C-H bonds, accelerating the rapid desorption of propylene products and resulting in a slow deactivation rate. Therefore, the catalyst lifetime can be prolonged to more than 30 days under mild operating conditions (525 °C).

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Publication Details

Journal
Journal of the American Chemical Society
Published
2025-08-30
DOI
https://doi.org/10.1021/jacs.5c04531
Citations
6
Primary Topic
Catalysis and Oxidation Reactions
Type
article
Field-Weighted Citation Impact
2.33

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article

Ultralow Content of Chromium Species in Zeolite for Efficient Catalytic Propane Dehydrogenation

Feng Ryan Wang, Zhangyi Yao, Hui Yu, Yucai Qin et al.
6 citations
Journal of the American Chemical Society
Catalysis and Oxidation Reactions
2.33
article

Ultralow Content of Chromium Species in Zeolite for Efficient Catalytic Propane Dehydrogenation

Feng Ryan Wang, Zhangyi Yao, Hui Yu, Yucai Qin, Feng‐Shou Xiao, Xuedi Qin, Shengqi Chu, Guodong Qi, Lijuan Song, Liang Wang, Jun Xu, Yueying Chu, Hang Zhou, Lu Liu, Feng Deng
article en
6 citations

Abstract

Supported chromia catalysts have been commercially used in propane dehydrogenation, which relies on Cr loading at weight fractions of up to 20 wt %. This leads to problems in managing spent catalysts with a high content of toxic chromium species. These catalysts also rapidly deactivate within 10-15 min, requiring frequent regeneration in each cycle. To overcome these problems, we developed a siliceous MFI zeolite with an ultralow Cr content (e.g., 0.09 wt %) that exhibits high activity and durability for propane dehydrogenation. A mechanism study revealed that the chromic hydroxyl species readily dissociated the C-H bonds, accelerating the rapid desorption of propylene products and resulting in a slow deactivation rate. Therefore, the catalyst lifetime can be prolonged to more than 30 days under mild operating conditions (525 °C).

Journal of the American Chemical SocietyVol. 147(36)
Ningbo University (CN), Ministry of Education (NZ), University of Nottingham Ningbo China (CN), Liaoning Shihua University (CN), Chinese Academy of Sciences (CN), Wuhan Institute of Physics and Mathematics (CN), Catalytic Materials (United States) (US), Institute of High Energy Physics (CN), University College London (GB), Zhejiang University (CN)
National Natural Science Foundation of China, Zhejiang University, National Key Research and Development Program of China
Openalex Percentile: Top 11%
Catalysis and Oxidation Reactions
2.33
DOISourceOpenAlex
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