Studies on the CrF3/AlF3 catalyst for synthesis of HFC-134a as a substitute for CFC-12 -: (V) -: Interaction of CrF3 and AlF3

被引：0

作者：

Lu, J ^{[1
]}

Shi, L

Li, HL

Peng, SY

机构：

[1] Xian Modern Chem Res Inst, Xian 710065, Peoples R China

[2] Acad Sinica, Inst Coal Chem, Taiyuan 030001, Peoples R China

来源：

CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE | 1998年 / 19卷 / 10期

关键词：

interaction of CrF3 and AlF3; turnover frequency; 1,1,1,2-tetrafluoroethane; active species;

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The effects of Cr3+ content in CrF3/AlF3 catalysts on activity for synthesis of HF-134a from reaction of HCFC-133a with HF were investigated, FTIR, EPR and XPS have been employed to characterize the CrF3/AlF3 catalysts. The results show that CrF3 existed in a monolayer dispersion where the interaction between CrF3 and AlF3 support became stronger when Cr3+ content less than 1%. The CrF3/AlF3 catalyst with 0. 1% Cr3+ exhibits the highest turnover frequency. The residual oxygen in the catalyst forms surface active species of CrAlOmFn from the interaction of CrF3 and AlF3, which is the cause of high selectivity to HFC-134a in F/Cl exchange reaction.

引用

页码：1677 / 1679

页数：3

共 11 条

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