Study of trifluoromethane dissociation within wide pressure and temperature ranges by molecular resonance absorption spectroscopy

Abstract

The concentration of CF₂ produced via trifluoromethane, CF₃H, dissociation behind reflected shock waves is measured by molecular resonance absorption spectroscopy method within wide ranges of CF₃H concentrations, temperatures, and pressures (38 ≤ n[CF₃H] ≤ 27000 ppm, 1180 ≤ T ≤ 2780 K, and P = 1.5–18 bar). The heat release of CF₂ radical formation in trifluoromethane pyrolysis is experimentally determined. We analyze the experimental data obtained at low and high pressures and find the normalization factor for the best coincidence of those data. We determine the activation energy E_a at low and high pressures and obtain the generalized activation energy E_a for all the experimental data.