Synergistic mechanism of isolated Fe3+ and highly dispersed Ptδ+ over zeolite for boosting propane dehydrogenation - Details

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Pt-based　catalysts　have　been　widely　investigated　in　propane　dehydrogenation　(PDH)　owing　to　their　high　activity　in　C-H　activation,　while　it　suffers　from　Pt　sintering　and　coke　deposition.　We　develop　a　transition　metal　Fe　and　zeolite　support　synergistic-modified　method　to　realize　the　highly　dispersed　and　stable　Pt　species　inside　zeolite　over　Pt/Fe-silicate-1.　And　it　shows　the　excellent　PDH　performance　with　propylene　generation　rate　of　51.6　mol　C3H6　gPt−1　h−1　and　low　deactivation　rate　constant　kd　of　0.017　h−1　as　well　as　a　high　TOFPt　of　37.6　s−1　at　550°C.　The　systematic　characterizations　reveal　the　isolated　Fe3+　species　could　significantly　improve　Pt　dispersity　and　regulate　Pt　electronic　density　to　realize　a　more　positive　Ptδ+　species　inside　Silicalite-1　pore.　And　the　further　in　situ　DRIFTS　experiments　demonstrate　that　the　synergistic　effect　between　the　appropriate　acidic　Fe　sites　and　the　highly　dispersed　Ptδ+　species　around　Fe　species　are　responsible　for　the　superior　PDH　performance.　©　2023　American　Institute　of　Chemical　Engineers.

Keyword：

Activation analysis Chemical activation Dehydrogenation Iron Platinum compounds Propane Rate constants Sintering Zeolites

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[ 1 ] [Zhang, Ying]Institute of Molecular Catalysis and In-Situ/Operando Studies, College of Chemistry, Fuzhou University, Fuzhou, China
[ 2 ] [Wang, Xiaofang]Institute of Molecular Catalysis and In-Situ/Operando Studies, College of Chemistry, Fuzhou University, Fuzhou, China
[ 3 ] [Deng, Huihui]Institute of Molecular Catalysis and In-Situ/Operando Studies, College of Chemistry, Fuzhou University, Fuzhou, China
[ 4 ] [Sun, Qin]Institute of Molecular Catalysis and In-Situ/Operando Studies, College of Chemistry, Fuzhou University, Fuzhou, China
[ 5 ] [Li, Baozhen]Institute of Molecular Catalysis and In-Situ/Operando Studies, College of Chemistry, Fuzhou University, Fuzhou, China
[ 6 ] [Zheng, Wenchun]Institute of Molecular Catalysis and In-Situ/Operando Studies, College of Chemistry, Fuzhou University, Fuzhou, China
[ 7 ] [Ren, Zhuangzhuang]Institute of Molecular Catalysis and In-Situ/Operando Studies, College of Chemistry, Fuzhou University, Fuzhou, China
[ 8 ] [Fang, Xiangqing]Xi'an Aeronautical University, Shaanxi Province, Xi'an, China
[ 9 ] [Tan, Li]Institute of Molecular Catalysis and In-Situ/Operando Studies, College of Chemistry, Fuzhou University, Fuzhou, China
[ 10 ] [Tang, Yu]Institute of Molecular Catalysis and In-Situ/Operando Studies, College of Chemistry, Fuzhou University, Fuzhou, China
[ 11 ] [Wu, Lizhi]Institute of Molecular Catalysis and In-Situ/Operando Studies, College of Chemistry, Fuzhou University, Fuzhou, China

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Source ：

AIChE Journal

ISSN： 0001-1541

Year： 2023

Issue： 12

Volume： 69

3 . 5

JCR@2023

3 . 5 0 0

JCR@2023

JCR Journal Grade：2

CAS Journal Grade：3

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ESI Highly Cited Papers on the List： 0 Unfold All

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30 Days PV： 6

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