Comparison of n-Dodecane Hydroisomerization Performance Over Pt Supported ZSM-48 and ZSM-22

被引：22
|
作者：
Wang, Yan [1 ]
Liu, Wei [1 ]
Zhang, Wei [1 ]
Sun, Jinghui [1 ]
Li, Sai [1 ]
Zheng, Jiajun [1 ]
Fan, Binbin [1 ]
Li, Ruifeng [1 ]
机构：
[1] Taiyuan Univ Technol, Coll Chem & Chem Engn, Taiyuan 030024, Peoples R China
来源：
CATALYSIS LETTERS | 2021年 / 151卷 / 12期
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
Hydroisomerization; ZSM-48; ZSM-22; N-dodecane;
D O I：
10.1007/s10562-021-03587-8
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：
ZSM-48 and ZSM-22 zeolites with similar Si/Al ratio were synthesized and modified by alkali treatment. Moreover, n-dodecane hydroisomerization performance of Pt supported ZSM-22 and ZSM-48 were investigated. The catalytic results showed that the activity and the isomers selectivity of n-dodecane hydroisomerization could be improved by alkali treatment. The isomers distributions were distinct for Pt/ZSM-48 and Pt/ZSM-22. Mono-branched isomers near the end of the chains were more prone to be generated on Pt/ZSM-22 catalyst, which suggested "pore-mouth" catalysis model dominating the hydroisomerization catalysis. However, di-branched isomers and mono-branched isomers with methyl near the middle of the carbon chains were favorable to be formed over Pt/ZSM-48 catalyst according to the "key-lock" catalysis model. Moreover, more central-branched isomers were formed at high reaction temperature (> 320 degrees C) especially for Pt/ HZSM-22. [GRAPHICS] .
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页码：3492 / 3500
页数：9
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