The inhibition of atmospheric aqueous phase autoxidation of sulfur dioxide by volatile organic compounds : Benzene, toluene, o-xylene, m-xylene, p-xylene, n-hexane and dichloromethane
Year: 2017
Type: article
Abstract: Atmospheric Chemistry Lab, Department of Chemistry, University of Rajasthan, Jaipur-302 004, Rajasthan, India E-mail : [email protected], [email protected] Manuscript received 06 January 2017, revised 17 February 2017, accepted 21 February 2017 This comprehensive study examines the effect of seven volatile organic compounds (VOCs), viz. benzene, toluene, o-xylene, m-xylene, p-xylene, n-hexane, dichloromethane. The disappearance of aqueous sulfur(IV), [SIV], follows a first order kinetics. The nature of the dependence of kobs on the concentration of inhibitor, [Inh], was defined by eq. (A). kobs = ko /(1 + B [Inh]) where ko and kobs are the first order rate constant in the absence and the presence of VOCs, respectively and B is an empirical inhibition parameter. Among VOCs, whereas p-xylene, n-hexane and dichloromethane had no effect, o-xylene and m–xylene displayed strong inhibition. Addition of benzene and toluene resulted in the introduction of induction period indicating a very high value of B. The experimental B values, are (1.4±0.83)×104 and (2.33±1.4)×104 L mol–1 for o-xylene and m-xylene, respectively.
Language: English
Subfield: Atmospheric Science
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4299833859