Environmental chamber study of the photochemical reaction of ethyl methyl sulfide and NOx

Abstract A series of experiments were conducted in a self-made smog chamber at (300 ± 1) K and 1.01 × 10 5 Pa to simulate the photochemical reaction of ethyl methyl sulfide (EMS) and NO x . The results showed that the higher the initial concentration of EMS, the more ozone was generated in the simulative reactions. It was found that the light intensity plays a very important role in the evaluation of ozone formation potential for EMS. The parameters of d(O 3 -NO) and IR (incremental reactivity) were used to quantify the potential of EMS on ozone formation. The obtained maximum IR values in this article for the five simulative reactions were 1.55 × 10 −2 , 0.99 × 10 −2 1.36 × 10 −2 , 2.47 × 10 −2 , and 1.65 × 10 −2 , respectively. A comparison between the results we obtained here and the results we obtained previously for di-tert-butyl peroxide and acetylene showed that the potential reactivity of EMS on ozone formation was at a relatively low level.