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Kinetic Studies for the Reaction of syn-CH3CHOO with CF3CH═CH2
Xiaohu Zhou1,2,3, Yiqiang Liu3,4, Yang Chen3,5,6
1Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China.
Abstract:
Hydrofluoroolefins (HFOs, CF2CH═CH2) have great potential to replace hydrofluorocarbons (HFCs) as refrigerants. Here the kinetics for the reaction of syn-CH3CHOO with CF3CH═CH2 (HFO-1243zf), the simplest of HFOs, have been studied in a flash photolysis flow reactor at a total pressure of 50 Torr, by using the OH laser-induced fluorescence (LIF) method. The bimolecular reaction rate coefficients were measured at temperatures ranging from 283 to 318 K. A weak positive temperature dependence was observed, with an activation energy of 1.41 ± 0.12 kcal mol-1. At 298 K, the measured rate coefficient was (2.42 ± 0.51) × 10-14 cm3 s-1, in the vicinity of the previously reported upper limit value for the reaction of CH2OO with CF3CH═CH2.
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