Active, selective and stable Pt/Fe-silicalite-1 catalyst for dehydrogenation of n-dodecane to linear mono-dodecene

被引：4
作者：
Yu, Pei [1 ]
Cui, Mengtao [1 ,2 ]
Li, Qingyang [1 ]
Wang, Da [1 ]
Wang, Zhong [1 ]
Li, Mingshi [2 ]
Li, Xuebing [1 ]
机构：
[1] Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao 266101, Shandong, Peoples R China
[2] Chcmgsshou Univ, Adv Catalysis Green Mfg Collaborat Innovat Ctr, Jiangsu Key Lab Adv Catalyt Mat & Technol, Changzhou 213164, Jiangsu, Peoples R China
来源：
APPLIED CATALYSIS A-GENERAL | 2020年 / 608卷
关键词：
Dehydrogenation; N-dodecane; Pt/Fe-silicalite-1; Selective; Stable; MAL2O4; M-MG; PROPANE DEHYDROGENATION; BUTANE DEHYDROGENATION; ACID SITES; FE SITES; ZEOLITE; PERFORMANCE; STABILITY; PLATINUM; CLUSTERS;
D O I：
10.1016/j.apcata.2020.117860
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Dehydrogenation of n-dodecane to linear mono-dodecene by traditional Pt-Sn/gamma-Al2O3 catalyst suffers from low linear mono-dodecene selectivity and catalyst instability due to the surface acidity of gamma-Al2O3. In this work, we used Fe-silicalite-1, ZSM-5 and silicalite-1 as supports to disperse Pt for catalyzing n-dodecane dehydrogenation. Various characterization of Pt/zeolite catalysts confirm that metallic Pt donating electrons to Fe3+ in Pt/Fe-silicalite-1 catalyst makes Pt nanoparticles anchored at the framework Fe site in the Fe-silicalite-1 zeolite, which leads to formation of well-dispersed and high stability of Pt nanoparticles. Meanwhile, the acidity of as-prepared catalysts follows the order of Pt/ZSM-5 > Pt/Fe-silicalite-1 > Pt/silicalite-1. The higher catalytic activity, higher linear mono-dodecene selectivity and superior stability of Pt/Fe-silicalite-1 catalyst compared to Pt/ZSM-5 and Pt/silicalite-1 catalysts for n-dodecane dehydrogenation is owing to well-dispersed and stable electron-deficient metallic Pt anchored at the Fe site in Fe-silicalite-1 zeolite framework and moderate acidity of Fe-silicalite-1.
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页数：9
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