EVALUATION OF THE RELATIVE ACID STRENGTH OF CERIUM AND CALCIUM EXCHANGED Y-ZEOLITE BY TG AND DSC

被引：21

作者：

ARAUJO, AS

FERNANDES, VJ

GIOLITO, I

ZINNER, LB

机构：

[1] UNIV FED RIO GRANDE NORTE,DEPT QUIM,CP 1662,BR-59072 NATAL,RN,BRAZIL

[2] UNIV SAO PAULO,INST QUIM,BR-01498 SAO PAULO,BRAZIL

来源：

THERMOCHIMICA ACTA | 1993年 / 223卷

基金：

巴西圣保罗研究基金会;

关键词：

D O I：

10.1016/0040-6031(93)80127-V

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The relative acid strength of cerium and calcium Y zeolite was evaluated by thermogravimetry (TG) and differential scanning calorimetry (DSC) methods, using n-butylamine as a molecular probe. The total acidity was calculated from TG curves whereas the relative acid strength given in J per acid site was determined by the DSC curves, using the Borchardt-Daniels kinetic model. The enthalpies of these processes are proportional to the acid-site strength in each specific temperature range.

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页码：129 / 134

页数：6

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