脱氢
丙烷
烧结
沸石
催化作用
过渡金属
金属
化学
无机化学
化学工程
材料科学
有机化学
工程类
作者
Ying Zhang,Xiaofang Wang,Huihui Deng,Qin Sun,Baozhen Li,Wenchun Zheng,Zhuangzhuang Ren,Xiangqing Fang,Li Tan,Yu Tang,Lizhi Wu
摘要
Abstract Pt‐based catalysts have been widely investigated in propane dehydrogenation (PDH) owing to their high activity in CH 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 C 3 H 6 g Pt −1 h −1 and low deactivation rate constant k d of 0.017 h −1 as well as a high TOF Pt of 37.6 s −1 at 550°C. The systematic characterizations reveal the isolated Fe 3+ species could significantly improve Pt dispersity and regulate Pt electronic density to realize a more positive Pt δ+ 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 Pt δ+ species around Fe species are responsible for the superior PDH performance.
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