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.

引用

页码：393 / 400

页数：8

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