Journal article
Conversion of CHF3 to CH2=CF2 via reaction with CH4 and CaBr2
Environmental Science & Technology, Vol.42(15), pp.5795-5799
2008
Abstract
Reaction of CHF3 and CH4 over CaBr2 was investigated at 400-900°C as a potential route for transforming the highly potent greenhouse gas, CHF3, into the valuable product CH 2=CF2. The homogeneous reaction of CHF3 with CH4 was also studied to assist in understanding the chemistries involved. Compared to the gas phase reaction, the addition of CaBr2 as a reactant increases the conversion of CHF3 and CH4 significantly at low temperatures while to a lesser extent at higher temperatures. In the absence of CaBr2, besides the target product, CH2=CF2, a large amount of C2F4 forms. On addition of CaBr2, the rate of formation of C 2F4 drops dramatically to near zero, while the rate of formation of CH2=CF2 increases considerably at temperatures below 880°C. Experimental and theoretical studies suggest that CHF3 strongly interacts with CaBr2, resulting in the fluorination of CaBr2 to CaF2, the release of active Br species results in the selective formation of CBrF3. The subsequent reactions involving Br, methane, and CBrF3 play a major role in the observed enhanced yield of CH2=CF2.
Details
- Title
- Conversion of CHF3 to CH2=CF2 via reaction with CH4 and CaBr2
- Authors/Creators
- W. Han (Author/Creator) - University of Newcastle AustraliaH. Yu (Author/Creator) - University of Newcastle AustraliaE.M. Kennedy (Author/Creator) - University of Newcastle AustraliaJ.C. Mackie (Author/Creator) - University of Newcastle AustraliaB.Z. Dlugogorski (Author/Creator) - University of Newcastle Australia
- Publication Details
- Environmental Science & Technology, Vol.42(15), pp.5795-5799
- Publisher
- American Chemical Society
- Identifiers
- 991005545328007891
- Copyright
- © 2008 American Chemical Society.
- Murdoch Affiliation
- Murdoch University
- Language
- English
- Resource Type
- Journal article
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- Citation topics
- 2 Chemistry
- 2.1 Synthesis
- 2.1.883 Fluorination Chemistry
- Web Of Science research areas
- Engineering, Environmental
- Environmental Sciences
- ESI research areas
- Environment/Ecology