The study was designed to discriminate between several plausible mechanisms of chemical transformations in non-thermal discharges. A set of molecules was chosen based on their ionization energy: 12.71 eV, 11.71 eV and 11.32 eV for CH2F2, CH2FCl and CH2Cl2 in comparison with the ionization energy of molecular oxygen, 12.07 eV. Kinetics of the destruction in a dielectric barrier discharge was studied over the concentration range 10 - 1000 ppm using a tubular coaxial AC dielectric barrier flow reactor coupled to a MS and a GC-MS. Significant differences were observed both in the destruction efficiency and its concentration dependence for CH2F2 compared to the two other molecules. The efficiency of the destruction of CH2F2 is very low and does not improve with the reduction of CH2F2 concentration. The destruction of CH2FCl and CH2Cl2 is much more efficient, and the efficiencies of the destruction are concentration dependent. Additional experiments were performed with chlorofluorocarbon mixtures. The results are consistent with the mechanism of destruction based on the ionizations transfer ("trapping") on the impurity molecules. Partial product characterization was performed.