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Experimental and chemical kinetic study of the pyrolysis of trifluoroethane and the reaction of trifluoromethane with methane
- Source :
- Journal of Fluorine Chemistry. 131:751-760
- Publication Year :
- 2010
- Publisher :
- Elsevier BV, 2010.
-
Abstract
- A detailed reaction mechanism is developed and used to model experimental data on the pyrolysis of CHF 3 and the non-oxidative gas-phase reaction of CHF 3 with CH 4 in an alumina tube reactor at temperatures between 873 and 1173 K and at atmospheric pressure. It was found that CHF 3 can be converted into C 2F 4 during pyrolysis and CH 2=CF 2 via reaction with CH 4. Other products generated include C 3F 6, CH 2F 2, C 2H 3F, C 2HF 3, C 2H 6, C 2H 2 and CHF 2CHF 2. The rate of CHF 3 decomposition can be expressed as 5.2×10 13[s -1]e -295[kJmol -1]/RT. During the pyrolysis of CHF 3 and in the reaction of CHF 3 with CH 4, the initial steps in the reaction involve the decomposition of CHF 3 and subsequent formation of CF 2 difluorocarbene radical and HF. It is proposed that CH 4 is activated by a series of chain reactions, initiated by H radicals. The NIST HFC and GRI-Mech mechanisms, with minor modifications, are able to obtain satisfactory agreement between modelling results and experimental data. With these modelling analyses, the reactions leading to the formation of major and minor products are fully elucidated.
- Subjects :
- Reaction mechanism
Order of reaction
Difluorocarbene
Radical
Organic Chemistry
Trifluoroethane
Biochemistry
Decomposition
Inorganic Chemistry
chemistry.chemical_compound
chemistry
Environmental Chemistry
Organic chemistry
Physical chemistry
Physical and Theoretical Chemistry
Pyrolysis
Chain reaction
Subjects
Details
- ISSN :
- 00221139
- Volume :
- 131
- Database :
- OpenAIRE
- Journal :
- Journal of Fluorine Chemistry
- Accession number :
- edsair.doi...........801d3891f676c53162415be41c03470a