The Effect of Zeolite Structure on the Activity and Selectivity in p-Xylene Alkylation with Isopropyl Alcohol

被引：9
作者：
Musilova-Pavlackova, Zuzana [1 ]
Kubu, Martin [1 ]
Burton, Allen W. [2 ]
Zones, Stacey I. [2 ]
Bejblova, Martina [1 ]
Cejka, Jiri [1 ]
机构：
[1] Acad Sci Czech Republic, J Heyrovsky Inst Phys Chem, VVI, CR-18223 Prague 8, Czech Republic
[2] Chevron Energy & Technol Co, Richmond, CA 94802 USA
来源：
CATALYSIS LETTERS | 2009年 / 131卷 / 3-4期
关键词：
SSZ-35; SSZ-33; p-Xylene; Alkylation; 2,5-Dimethyl cumene (1-isopropyl-2,5-dimethyl-benzene); MOLECULAR-DYNAMICS; CONSTRAINT INDEX; FORCE-FIELD; TOLUENE; SSZ-33; ZSM-5; ACID; DISPROPORTIONATION; ISOMERIZATION; CATALYSIS;
D O I：
10.1007/s10562-009-0039-3
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：
The effect of zeolite architecture and channel dimensionality on p-xylene conversion and selectivity to 1-isopropyl-2,5-dimethyl-benzene was investigated in p-xylene alkylation with isopropyl alcohol over novel zeolites SSZ-33 and SSZ-35. Catalytic behavior of these zeolites was compared with those of zeolites Beta, mordenite, ZSM-11 and ZSM-5. It was found that p-xylene conversion increases with increasing pore size and connectivity of the channel system of individual zeolites with the exception of SSZ-35, which possesses a system of one-dimensional 10-ring channels that periodically open into wide, shallow cavities circumscribed by 18-rings. SSZ-35 exhibited the highest conversion among all zeolites at the reaction temperature of 150 degrees C and also the highest selectivity to 1-isopropyl-2,5-dimethyl-benzene. Molecular modeling confirmed the dimensions of the 18-ring cages are optimal for the formation of this alkylation product.
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收藏
页码：393 / 400
页数：8
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