The Dissociation Rate of S2 Produced from COS Pyrolysis

The disappearance rate of S2, which was produced from the pyrolysis of COS, was measured behind incident shock waves by monitoring the UV emission in the temperature range of 4500–6000 K and in the pressure range of 0.32–0.5 atm. It was found that two processes could possibly account for the disappearance of S2: S_2+Ar→2S+Ar\ ag3 and (Remark: Graphics omitted.) and the following rate equation was obtained: -d[S_2]/dt=k_II[S_2][Ar]mol cm^-3s^-1 where k_II=10^13.68exp(-77kcal/RT)cm^3mol^-1s^-1.