Hydrodechlorination of 1,1-Dichlorotetrafluoroethane and Dichlorodifluoromethane Catalyzed by Pd on Fluorinated Aluminas: The Role of Support Material

The gas phase hydrodechlorination of CF3CFCl2to CF3CFH2and CF2Cl2to CF2H2catalyzed by Pd supported on Al2O3, a series of fluorinated Al2O3, and AlF3was investigated. A combination of reaction kinetics investigations and characterization byin situFTIR spectroscopy has been performed. It has been foun...

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Bibliographic Details
Published in:Journal of catalysis 1999-02, Vol.182 (1), p.219-227
Main Authors: Early, Kintu, Kovalchuk, Vladimir I., Lonyi, Ferenc, Deshmukh, Subodh, d'Itri, Julie L.
Format: Article
Language:English
Subjects:
Catalysis
Catalysts: preparations and properties
Chemistry
Exact sciences and technology
General and physical chemistry
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:The gas phase hydrodechlorination of CF3CFCl2to CF3CFH2and CF2Cl2to CF2H2catalyzed by Pd supported on Al2O3, a series of fluorinated Al2O3, and AlF3was investigated. A combination of reaction kinetics investigations and characterization byin situFTIR spectroscopy has been performed. It has been found that for reactions involving CF3CFCl2, all catalysts exhibit a rapid and significant decrease in activity; however, little change in activity with time on stream occurs with CF2Cl2. FTIR investigations suggest the occurrence of direct reaction between the CFC and the support material, which results in the consumption of hydroxyl groups during the early stages of reaction. The effect of fluorination of support on catalytic behavior of Pd is discussed.
ISSN:0021-9517
1090-2694
DOI:10.1006/jcat.1998.2342