脱氢
丙烷
催化作用
多孔性
化学工程
材料科学
化学
有机化学
复合材料
工程类
作者
Fuwen Yang,Jie Zhang,Jin Zhang,Gang Wang,Yu Tao,Junyu Zhao,Qian Li,Zongbo Shi,Runsheng Zhuo,Ruilin Wang
出处
期刊:Fuel
[Elsevier]
日期:2024-05-01
卷期号:364: 131163-131163
标识
DOI:10.1016/j.fuel.2024.131163
摘要
Propane dehydrogenation (PDH) provides a promising way to meet the requirement of propylene supply, but the commonly-used Pt-based catalysts still suffer from unsatisfactory stability and deactivation. Herein, an interfacial regulation strategy is developed to construct the Cu, Pt, and Zn species modified hollow porous silicalite-1 (CuPt/Zn-HPS-1). Owing to the regulation role of Pt, the electron-deficient [ZnOH]+ Lewis acid sites accelerated the C-H activation, which was beneficial to achieve the excellent PDH performance. More importantly, the additionally introduced Cu2+ further modulated the geometric structure and electronic density of Pt, thus effectively improving the anti-sintering ability and alleviating the coke deposition. Benefiting from the interfacial regulation and Lewis active [ZnOH]+ sites, the optimal CuPt/Zn-HPS-1 catalyst exhibited an excellent catalytic PDH performance with the initial propane conversion of 30.4 % and propylene selectivity of 99.0 %. The CuPt/Zn-HPS-1 also demonstrated robust recycling stability in reaction-regeneration cycling test with the smaller deactivation rate constant. This work affords a strategy for improving PDH performance in practical industrial application.
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