Stable Cobalt–Zeolite Propane-Dehydrogenation Catalysts Enabled by Reaction-Driven Reconstruction - Details

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Abstract：

Cobalt-based　catalysts　have　emerged　as　promising　substitutes　for　Pt-　and　Cr-based　propane　dehydrogenation　(PDH)　catalysts.　However,　controlling　the　distribution　of　Co　species　and　achieving　stable　active　centers　remains　challenging.　Here,　we　report　that　reaction-driven　reconstruction　of　metallic　cobalt　(Co0)　species　within　pure　silica　MFI　zeolite　(S-1)　into　CoOx　clusters　within　silanol　nests　during　PDH　yields　efficient　and　durable　performance.　Atomically　dispersed　CoOx　clusters　exhibit　exceptional　durability　and　high　propylene　space-time　yield　(STY),　maintaining　an　ultrahigh　propylene　STY　of　17.2 mmolC3H6 gcat−1 h−1　for　over　260 h　under　industrially　relevant　conditions,　surpassing　previous　cobalt-based　PDH　catalysts.　Moreover,　the　catalyst　operates　stably　at　520 °C　for　170 h　with　near-equilibrium　propane　conversions.　Comprehensive　characterizations　indicate　the　dynamic　evolution　process　from　the　silanol　nests　effectively　capturing　and　stabilizing　Co0　species　within　S-1　zeolite,　thereby　promoting　the　dynamic　formation　of　CoOx　clusters　during　the　PDH　process.　We　also　demonstrate　that　stable　Co─O　active　centers　formed　by　this　unique　anchoring　strategy　improve　catalyst　stability　by　suppressing　coke　formation　and　promoting　efficient　propane　dehydrogenation.　©　2025　Wiley-VCH　GmbH.

Keyword：

Cobalt Dehydrogenation Propylene

Community：

[ 1 ] [Liu, Qiang]School of Chemical Engineering and Technology, Collaborative Innovation Center of Chemical Science and Engineering, Institute of Molecular Plus, Department of Chemistry, Tianjin University, Tianjin; 300072, China
[ 2 ] [Yao, Yongbin]Key Laboratory of Luminescence and Optical Information, Ministry of Education, School of Physical Science and Engineering, Beijing Jiaotong University, Beijing; 100044, China
[ 3 ] [Li, Junmeng]State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing; 102249, China
[ 4 ] [Wang, Jingnan]Institute of Molecular Engineering Plus, College of Chemistry, Fuzhou University, Fuzhou; 350108, China
[ 5 ] [Chen, Lili]Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing; 100190, China
[ 6 ] [Li, Wenlin]College of Chemistry and Chemical Engineering, State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan; 030024, China
[ 7 ] [Guo, Yangyang]CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Mesoscience and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing; 100190, China
[ 8 ] [Yao, Siyu]College of Chemical and Biological Engineering, Zhejiang University, Hangzhou; 310027, China
[ 9 ] [Yang, Yongan]School of Chemical Engineering and Technology, Collaborative Innovation Center of Chemical Science and Engineering, Institute of Molecular Plus, Department of Chemistry, Tianjin University, Tianjin; 300072, China
[ 10 ] [Wang, Xi]State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing; 102249, China

Reprint 's Address：

[li, wenlin]college of chemistry and chemical engineering, state key laboratory of clean and efficient coal utilization, taiyuan university of technology, taiyuan; 030024, china

Email：

xiwang@bjtu.edu.cnliwenlin@tyut.edu.cnyyguo@ipe.ac.cnyaosiyu@zju.edu.cn

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