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
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.
引用
收藏
页码:129 / 134
页数:6
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