Development of catalyst for n-paraffins hydroisomerization

被引：0
|
作者：
Wang E. [1 ]
Jin L. [2 ]
Gao S. [3 ]
Chi K. [3 ]
Duan A. [1 ]
机构：
[1] State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing
[2] Daqing Petrochemical Research Center of Petro China, Heilongjiang, Daqing, Beijing
[3] Petrochemical Research Institute of Petro China, Beijing
来源：
Huagong Jinzhan/Chemical Industry and Engineering Progress | 2022年 / 41卷 / 06期
关键词：
acid carrier; catalysts; isomerization; metal; paraffins;
D O I：
10.16085/j.issn.1000-6613.2021-1406
中图分类号：
学科分类号：
摘要：
With the increasing strictness of environmental regulation and fuel quality requirements, the hydroisomerization of n-paraffins for producing high-octane gasoline, low-freezing point diesel and highviscosity index lubricating oil, becomes more and more important. This review summarizes the bifunctional catalysts for the hydroisomerization reaction, which were mainly composed of a metal center to provide hydrogenation/dehydrogenation activity and an acidic support for skeletal isomerization. The contributions of different metal centers and acidic supports in dual-functional catalysts are introduced. Compared with bifunctional catalysts loaded with precious metals, catalysts doped by bimetallic, transition metal phosphides and rare earth have similar activity, higher sulfur resistance and lower cost. Moreover, mesoporous molecular sieve with large pore size is beneficial to the diffusion of reactants and products, and has high acidity, which promotes the skeleton isomerization. Therefore, it attracts extensive attentions from researchers. Finally, the main factor affecting the isomerization performance of dualfunctional catalyst is the balance between the metal and the acidic support, that means, the ratio and distance between the metal center and the acid center. The catalysts with a suitable metal center/acid center ratio and a nano scale metal-acid center distance should have high catalytic activity and isomerization product selectivity. © 2022, Chemical Industry Press Co., Ltd.. All rights reserved.
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页码：2967 / 2980
页数：13
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