Conversion of CHF(3) to CH(2)CF(2) via reaction with CH(4) in the presence of CBrF(3): An experimental and kinetic modelling study.
Gas-phase reaction of CHF(3) (HFC 23) with CH(4) in the presence of CBrF(3) (halon 1301) to produce CH(2)CF(2) (VDF) is presented. Experiments were carried out in a plug-flow reactor at temperatures between 873 and 1173 K. Under these conditions, CH(2)CF(2) was a dominant product observed, with CH(2)F(2), C(2)H(2), CH(2)CHF, C(2)F(4), C(2)H(6) and CHFCF(2) also detected. In the presence of less than 6000 ppm of CBrF(3), the rate of formation of CH(2)CF(2) is significantly enhanced, and a much lower rate of formation of the major by-product, C(2)F(4) is observed. Further increasing the proportion of CBrF(3) in the feed resulted in an even higher rate of formation of CH(2)CF(2). Experimental results are fitted very well by a model derived from the NIST and GRI-Mech 3.0 mechanisms, modified to include additional published kinetic data.
Han
Wenfeng
W
Process Safety and Environment Protection Research Group, PRCfE School of Engineering, The University of Newcastle, Callaghan, NSW 2308, Australia.
Kennedy
Eric M
EM
Mackie
John C
JC
Dlugogorski
Bogdan Z
BZ
D007700:Kinetics; D008697:Methane / Q000737:chemistry*; D008956:Models, Chemical
D008697:Methane