Mesoporous Beta zeolites with controlled distribution of Bronsted acid sites for alkylation of benzene with cyclohexene

被引：9
作者：
Huang, Yeqing [1 ,3 ]
Wang, Manna [1 ,2 ]
Huang, Yi [4 ]
Shang, Jin [5 ,6 ]
Liu, Baoyu [1 ,2 ]
机构：
[1] Guangdong Univ Technol, Sch Chem Engn & Light Ind, Guangzhou 510006, Peoples R China
[2] Rongjiang Lab, Chem & Chem Engn Guangdong Lab, Jieyang Branch, Jieyang 515200, Peoples R China
[3] Shenzhen Pingshan Dist Emergency Management Bur, Shenzhen 518118, Peoples R China
[4] Univ Edinburgh, Inst Mat & Proc, Sch Engn, Robert Stevenson Rd, Edinburgh EH9 3FB, Scotland
[5] City Univ Hong Kong, Sch Energy & Environm, Hong Kong, Peoples R China
[6] City Univ Hong Kong, Shenzhen Res Inst, Shenzhen, Peoples R China
来源：
RESULTS IN ENGINEERING | 2023年 / 19卷
基金：
中国国家自然科学基金;
关键词：
Bronsted acid sites; Beta zeolites; Cyclohexylbenzene; Alkylation; ADSORPTION; ACCESSIBILITY; OVERCHARGE; CONVERSION; CATALYSTS; METHANOL;
D O I：
10.1016/j.rineng.2023.101377
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The distribution of Bronsted acid sites in three-dimensional 12-membered pore channels of Beta zeolite was a decisive factor in the alkylation of benzene with cyclohexene. Here, the Bronsted acid site distribution in Beta zeolitic channels was precisely regulated by tuning the content of Na+ in crystallization system combined with tetraethylammonium cation, the Beta-55 with Bronsted acid sites exclusively located in straight channels (along a- and b-axis directions) was successfully synthesized by utilizing tetraethylammonium as the structure-directing agents without Na+ species, and the fraction of Bronsted acid sites in sinusoidal/straight channels of Beta zeolites can be accurately controlled by tailoring the content of Na+ in synthesis gel. Catalytic properties in the liquid alkylation between benzene and cyclohexene exhibited that Beta-55 zeolites with the Bronsted acid sites solely located in a-axis and b-axis channels showed the highest cyclohexene conversion, cyclohexylbenzene selectivity and longest lifetime in this reaction. In addition, the resultant Beta zeolites also exhibited low coke generation rate and robust regeneration performance in the alkylation reaction.
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页数：9
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