PILLARED CLAYS AND PILLARED ACID-ACTIVATED CLAYS - A COMPARATIVE-STUDY OF PHYSICAL, ACIDIC, AND CATALYTIC PROPERTIES

被引：145

作者：

MOKAYA, R

JONES, W

机构：

[1] Chemistry Department, University of Cambridge, Cambridge, CB2 1EW, Lensfield Road

来源：

JOURNAL OF CATALYSIS | 1995年 / 153卷 / 01期

关键词：

D O I：

10.1006/jcat.1995.1109

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 preparation, characterisation, and catalytic properties of alumina-pillared materials derived from an acid-treated host clay matrix is described. Various levels of acid treatment are studied in order to ascertain the level of acid treatment which yields pillared materials with the most suitable physicochemical properties and thermal stability. The pillared acid-activated clays prepared pos sess basal spacing (19.3 Angstrom after thermal treatment at 500 degrees C) and surface areas (315-374 m(2)/g) comparable to conventional pillared clays but significantly higher pore volume (0.33-0.48 cm(3)/g), average pore diameter and surface acidity. The improvement in acidity is mainly of the Bronsted acid type. As a result of improved acidity, the pillared acid-activated clays are better catalysts compared to conventional pillared clays and they exhibit activity indicative of the presence of strong Bronsted acid sites in the temperature range 250-400 degrees C. (C) 1995 Academic Press, Inc.

引用

页码：76 / 85

页数：10

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