EVOLUTION OF POROSITY AND SURFACE-ACIDITY IN MONTMORILLONITE CLAY ON ACID ACTIVATION

被引：139

作者：

KUMAR, P ^{[1
]}

JASRA, RV ^{[1
]}

BHAT, TSG ^{[1
]}

机构：

[1] INDIAN PETROCHEM CORP LTD,RES CTR,VADODARA 391346,INDIA

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 1995年 / 34卷 / 04期

关键词：

D O I：

10.1021/ie00043a053

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Evolution of surface acidity and porosity in montmorillonite clay on treating with sulfuric acid has been studied. It is observed that the clay treated with 4 N sulfuric acid shows the maximum surface acidity. Acid strength distribution as measured by Benesi's technique of nonaqueous titration shows acidity range mainly between H0 + 4.6 and +3.3. Nitrogen adsorption-desorption hysteresis data indicate the transformation of pores from slit-shaped to spheroidal or ink bottle type as the acid concentration is increased from 1 to 8 N. These observations are explained in terms of structural modifications of clay on treatment with acid.

引用

页码：1440 / 1448

页数：9

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