The kinetics of charged and excited particles and molecular species in
the afterglow of a pulse-repetitive microwave discharge was simulated
; humid air admired with CCl4 freon was used. The plasma-catalytic cyc
le involving electron and negative-ion processes was considered. The i
nfluence of the cycle on freon molecule decomposition was investigated
; its dependence on the number of pulses, the initial freon concentrat
ion, and the normalized electric field was studied. It was shown that
the catalytic effect was liable to reduce the energy expense of the fr
eon molecule decomposition by one-half.