Alxn+-grafted MCM-41 catalysts:: Probing the influence of temperature on the alumination process

被引：18

作者：

Mokaya, R ^{[1
]}

机构：

[1] Univ Cambridge, Dept Chem, Cambridge CB2 1EW, England

来源：

JOURNAL OF CATALYSIS | 2000年 / 193卷 / 01期

基金：

英国工程与自然科学研究理事会;

关键词：

Al-grafted MCM-41; aluminosilicate MCM-41; alumination; grafting; grafting temperature; catalytic activity; acidity;

D O I：

10.1006/jcat.2000.2874

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 influence of grafting temperature on Al-grafted MCM-41 catalysts prepared by reacting pure silica MCM-41 with aqueous solutions containing Al polycations was investigated by performing the alumination at room temperature (RT) or 80 degrees C, Better retention of structural integrity was achieved at 80 degrees C than at RT, and incorporation of Al was up to four times higher at 80 degrees C. The higher Al content of materials grafted at 80 degrees C translated to higher acid content and higher total conversions for the dealkylation of cumene. However, the catalytic activity per active site (TOF values) was higher for RT-grafted materials presumably due to better site isolation, (C) 2000 Academic Press.

引用

页码：103 / 107

页数：5

共 31 条

[1] Synthesis and characterization of mesostructured materials [J].