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Journal Articles International Journal of Chemical Kinetics Year : 2023

Temperature dependent rate constant for the reaction of H‐atoms with carbonyl sulfide

Abstract

Abstract The kinetics of the reaction of H‐atom with carbonyl sulfide (OCS) has been investigated at nearly 2 Torr total pressure of helium over a wide temperature range, T = 255–960 K, using a low‐pressure discharge flow reactor combined with an electron impact ionization quadrupole mass spectrometer. The rate constant of the reaction H + OCS → SH + CO (1) was determined under pseudo‐first order conditions, monitoring the kinetics of H‐atom consumption in excess of OCS, k 1 = 6.6 × 10 −13 × ( T /298) 3 × exp(−1150/ T ) cm 3 molecule −1 s −1 (with estimated total uncertainty on k 1 of 15% at all temperatures). Current measurements of k 1 at intermediate temperatures (520–960 K) appear to reconcile previous high and low temperature data and allow the above expression for k 1 to be recommended for use in the extended temperature range between 255 and 1830 K with a conservative uncertainty of 20%.

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Dates and versions

hal-04278480 , version 1 (10-11-2023)

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Yuri Bedjanian. Temperature dependent rate constant for the reaction of H‐atoms with carbonyl sulfide. International Journal of Chemical Kinetics, 2023, ⟨10.1002/kin.21700⟩. ⟨hal-04278480⟩
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