Heterogeneous chemistry of dimethyl sulfide on soot surfaces

We have investigated the heterogeneous interaction between dimethyl sulfide (DMS) and soot surface by a low-pressure flow tube coupled single-photo ionization time of flight mass spectrometry. There are two processes in the DMS loss on soot, the irreversible process is the main process in this experiment. The reversible process takes up small percentage which is only a fraction of less than 20% of the adsorbed DMS. The initial uptake coefficient is 0.013 ± 0.005 at 298 K.