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Templates for the synthesis of zeolites
Huimin Luan, Qinming Wu, Jianping Wu, Xiangju Meng*, Feng-Shou Xiao*
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Pt confined in Sn-ECNU-46 zeolite for efficient alkane dehydrogenation

Naihong Wang, Longkang Zhang, Yejun Guan, Peng Wu, Hao Xu*

Chin. J. Struct. Chem., 2024, 43: 100248. DOI: 10.1016/j.cjsc.2024.100248

April 15, 2024

Alkane dehydrogenation; Heteroatom-containing zeolite; Zeolite confined catalyst; Pt-based catalyst

ABSTRACT

Highly dispersed and stable Pt-based catalysts play a crucial role in constructing efficient catalytic systems for alkane dehydrogenation. In this study, a novel bimetallic Pt-Sn catalyst confined in extra-large-pore ECNU-46 zeolite (denoted as Pt/Sn-ECNU-46) was prepared by post-treatment. The open-site framework Sn species ((SiO)3Sn-OH) served as anchors to interact with Pt species, favoring the high dispersion of Pt. On the other hand, the framework Sn species acted as the second metal to regulate the geometrical and electronic environment of Pt species, thus suppressing their accumulation. Pt/Sn-ECNU-46 achieved a good performance in propane dehydrogenation reaction with high initial propane conversion (46%) and propylene selectivity (> 99%) as well as regeneration ability. In addition, Pt/Sn-ECNU-46 was also active in the dehydrogenation of n-hexane. This study explored the application of extra-large-pore zeolite as support in constructing metal-confined catalysts for alkane dehydrogenation.

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