Rate coefficients for the gas-phase reaction of OH radicals with dimethyl sulfide: temperature and O2 partial pressure dependence

Literature Information

Publication Date 2005-11-23
DOI 10.1039/B512536G
Impact Factor 3.676
Authors

Ian Barnes, Karl H. Becker, Iulia Patroescu-Klotz, Raluca Mocanu, Thorsten Benter


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Abstract

Rate coefficients for the gas-phase reaction of hydroxyl (OH) radicals with dimethyl sulfide (CH3SCH3, DMS) have been determined using a relative rate technique. The experiments were performed under different conditions of temperature (250–299 K) and O2 partial pressure (∼0 Torr O2−380 Torr O2), at a total pressure of 760 Torr bath gas (N2 + O2), in a 336 l reaction chamber, using long path in situ Fourier transform (FTIR) absorption spectroscopy to monitor the disappearance rates of DMS and the reference compounds (ethene, propene and 2-methylpropene). OH was produced by the photolysis of H2O2. The following Arrhenius expressions adequately describe the rate coefficients as a function of temperature (units are cm3 molecule−1 s−1): k = (1.56 ± 0.20) × 10−12 exp[(369 ± 27)/T], for ∼0 Torr O2; (1.31 ± 0.08) × 10−14 exp[(1910 ± 69)/T], for 155 Torr O2; (5.18 ± 0.71) × 10−14 exp[(1587 ± 24)/T], for 380 Torr O2. The results are compared with previous investigations.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
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Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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