| Hydrodechlorination of CF3-CCl2F (CFC-114a) on Pd/ß-AlF3. An application of PulseTA® |  |
| Michael Feist, Irmina K. Murwani, and Erhard Kemnitz Institute of Chemistry, Humboldt University, Brook-Taylor-Str. 2, D-12489 Berlin, Germany |
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| The catalytic conversion of unwanted chlorofluorocarbons (CFC) into CFC-alternatives is an attractive option for its disposal. Because of their lower hazard potential towards the ozone layer deplition, hydrogen containing CFC-alternatives (HFC's) are the prefered products of this conversion reactions. | |
| The formation of CF3-CH2F (HFC-134a) by catalytic hydrodechlorination of CF3-CCl2F (CFC-114a) has been studied utilizing the PulseTA® technique. Instead of hydrogen as reactant, deuterium was used as pulse gas. This facilitated the detection of the reaction products, i.e. the discrimination of various hydrofluorocarbons (HFC), by mass spectrometry. | |
| The composition of the deuterated products confirms a reaction mechanism via the carbene CF3-CF: . Hydrogenated fluorocarbons were also formed which is explained by the interaction of chemisorbed deuterium with water traces retained in the channel structure of the catalyst. | |
| The obtained results demonstrate the potential of the PulseTAć technique for the investigation of solid state reactions. | |
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