An absolute and relative rate study of the reaction of oh radicals with dimethyl sulfide

An absolute rate pulse radiolysis technique was used to measure k(OH + 1,3-dioxolane) ) (8.8 ( 0.9) × 10 -12 cm 3 molecule -1 s -1 at 295 K in 1000 mbar of Ar. Relative rate techniques were used to study the reactions of OH radicals and Cl atoms with 1,3-dioxolane and Cl atoms with ethylene carbonate and methylene glycol diformate at 300 K in 1 bar of synthetic air. Rate coefficients were k(OH + 1,3-dioxolane) ) (1.04 ( 0.16) × 10 -11 , k(Cl + 1,3-dioxolane) ) (1.6 ( 0.3) × 10 -10 , k(Cl + ethylene carbonate) ) (7.1 ( 1.7) × 10 -12 , and k(Cl + methylene glycol diformate) ) (5.6 ( 0.7) × 10 -13 cm 3 molecule -1 s -1 . OH radical and chlorine atom initiated oxidation of 1,3-dioxolane in 1 bar of N 2 /O 2 mixtures at 298 K in the presence of NO x gives ethylene carbonate and methylene glycol diformate. Molar yields of ethylene carbonate and methylene glycol diformate were 0.48 ( 0.07 and 0.50 ( 0.14 for OH radical initiation and 0.43 ( 0.07 and 0.53 ( 0.07 for Cl atom initiation. Product yields were independent of O 2 partial pressure over the range studied (60-800 mbar). A photochemical mechanism was developed to describe the OH-initiated degradation of 1,3-dioxolane in the presence of NO x . The results are discussed with respect to the available literature data concerning the atmospheric chemistry of ethers.

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“…The kinetics of reaction 12 were measured relative to reactions Cl + 1,3-dioxolane f products (12) […”

Section: Atom Relative Rate Studies At Wuppertal and Fordmentioning

confidence: 99%

Atmospheric Chemistry of 1,3-Dioxolane: Kinetic, Mechanistic, and Modeling Study of OH Radical Initiated Oxidation

Sauer¹,

Barnes²,

Becker³

et al. 1999

J. Phys. Chem. A

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“…Major byproducts in the destruction of methanol are CO and NO x . The reactions of OH radicals with dimethyl sulfide (DMS) and the DMS oxidation process have been studied extensively in atmospheric chemistry [33][34][35][36][37]. These studies suggest that the major oxidation byproducts are SO 2 , and CO.…”

Section: Introductionmentioning

confidence: 99%

Methanol and Dimethyl Sulfide Removal by Pulsed Corona Part I: Experiment

Lock

Saveliev

Kennedy

2006

Plasma Chem Plasma Process

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Methanol and dimethyl sulfide are volatile organic compound (VOC) air pollutants that are subject of severe environmental regulations due to their toxicity, environmental persistence and odor. Traditional technologies are often inefficient for their removal, especially in the case of the dilute industrial streams. Non-thermal plasma methods, typically characterized by high removal efficiency, energy yields and good economy, offer possible alternative solutions. The present research employs pulsed corona discharge known for its high selectivity and low energy costs of emission control. This paper provides experimental (Part I) and in a later issue numerical (Part II) data on removal of methanol and dimethyl sulfide from dry and humid air streams. The removal efficiency and the specific energy input are evaluated along with the energy costs required for the removal process. Particular attention is given to the formation of unwanted byproducts such as NO x , CO, and SO 2 .

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“…(Table: [752] are presumably due to reactive impurities, while those of MacLeod et al [859] were most likely overestimated because of heterogeneous reactions. Absolute determinations lower than those recommended were obtained by Martin et al [878], Wallington et al [1392], and Nielsen et al [983]. The reasons for these differences are not readily apparent.…”

Section: -104mentioning

confidence: 41%

Environmental effects of large igneous province magmatism: a Siberian perspective

Black

Lamarque

Shields

et al. 2015

Volcanism and Global Environmental Change

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An absolute and relative rate study of the reaction of oh radicals with dimethyl sulfide

Cited by 25 publications

References 27 publications

Atmospheric Chemistry of 1,3-Dioxolane: Kinetic, Mechanistic, and Modeling Study of OH Radical Initiated Oxidation

Atmospheric Chemistry of 1,3-Dioxolane: Kinetic, Mechanistic, and Modeling Study of OH Radical Initiated Oxidation

Methanol and Dimethyl Sulfide Removal by Pulsed Corona Part I: Experiment

Environmental effects of large igneous province magmatism: a Siberian perspective

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