Activity in the Knoevenagel condensation of encapsulated basic cesium species in faujasite CsNaX or CsNaY

被引：36

作者：

Rodriguez, I ^{[1
]}

Cambon, H ^{[1
]}

Brunel, D ^{[1
]}

Lasperas, M ^{[1
]}

机构：

[1] Ecole Natl Super Chim Montpellier, CNRS, UMR 5618, Lab Mat Catalyt & Catalyse Chim Organ, F-34296 Montpellier 5, France

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 1998年 / 130卷 / 1-2期

关键词：

basic zeolite; encapsulation; CO2; TPD; Knoevenagel;

D O I：

10.1016/S1381-1169(97)00214-8

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：

The activity of basic species generated in zeolite CsNaX or CsNaY by cesium acetate impregnation and calcination under a synthetic air flow has been investigated. The Knoevenagel condensation of benzaldehyde and ethylcyanoacetate was used as a model reaction. The evaluation of the number of basic sites was carried out by CO2 TPD. Correlations between initial rates and number of basic sites allowed the determination of the TOF for the modified zeolites. It depends mainly on the host zeolite composition. Moreover, activity varies strongly with crystallinity especially for zeolites Y at high loadings. (C) 1998 Elsevier Science B.V.

引用

页码：195 / 202

页数：8