Hydrodechlorination of CF3-CCl2F (CFC-114a) on Pd/β-AlF3 -: An application of PulseTA®

被引：11

作者：

Feist, M ^{[1
]}

Murwani, IK ^{[1
]}

Kemnitz, E ^{[1
]}

机构：

[1] Humboldt Univ, Inst Chem, D-12489 Berlin, Germany

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2003年 / 72卷 / 01期

关键词：

fluorocarbons; hydrodechlorination; hydrofluorocarbons; pulse thermal analysis;

D O I：

10.1023/A:1023951232080

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The formation of CF3-CH2F (HFC-134a) by catalytic hydrodechlorination of CF3-CCl2F (CFC-114a) has been studied utilizing the recent PulseTA(R) technique. Instead of hydrogen as reactant, deuterium was used which facilitates the detection of the reaction products, i.e. the discrimination of various hydrofluorocarbons (HFC), by mass spectrometry. The product composition confirms a reaction mechanism via the carbene CF3-CF. Water traces which are retained in the channel structure of the catalyst interact with chemisorbed deuterium thus explaining the formation of hydrogenated fluorocarbons as well. The obtained results demonstrate the potential of the pulse technique for the investigation of solid state reactions.

引用

页码：75 / 82

页数：8

共 8 条

[1] Catalytic reactions of chlorofluoroethanes at fluorinated alumina and chromia aerogels and xerogels - A comparison of reaction pathways in alumina- and chromia-based catalysts [J].