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Conversion of a CFCs, HFCs and HCFCs waste mixture via reaction with methane
Journal article   Peer reviewed

Conversion of a CFCs, HFCs and HCFCs waste mixture via reaction with methane

W. Han, E.M. Kennedy, J.C. Mackie and B.Z. Dlugogorski
Journal of Hazardous Materials, Vol.184(1-3), pp.696-703
2010
DOI: https://doi.org/10.1016/j.jhazmat.2010.08.095
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Abstract

The gas-phase reaction of a mixture of waste refrigerant gases, namely R22 (CHClF 2), R12 (CCl 2F 2) and R134a (CH 2FCF 3) with CH 4 has been investigated over the temperature range of 873-1133K. The investigation was undertaken as an initial assessment of the viability of this process as a treatment option for waste mixtures of hydrofluorocarbons (HFCs), hydrochlorofluorocarbons (HCFC), chlorofluorocarbons (CFCs) and as a potential route for the synthesis of CH 2=CF 2 (VDF). During the reaction, CH 2=CF 2 is observed as the major product formed and a 43% selectivity to CH 2=CF 2 is obtained at 1073K. A detailed mechanism is developed based on the mechanistic analysis from kinetic modeling, with the initiation reaction involving the formation of Cl radicals from CCl 2F 2. Good agreement is achieved between the predictions and experimental results. Based on a mechanistic analysis, a summary of the major reaction pathways is proposed, which is consistent with the experimental observations.

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Citation topics
7 Engineering & Materials Science
7.177 Combustion
7.177.238 Combustion Dynamics
Web Of Science research areas
Engineering, Environmental
Environmental Sciences
ESI research areas
Engineering
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