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Temperature-Dependent Kinetic Study of the Reaction of Hydroxyl Radicals with Hydroxyacetone

Abstract : The kinetics of the reaction of OH radicals with hydroxyacetone has been investigated as a function of temperature at a total pressure of helium of 2.0-2.1 Torr and over an extended temperature range of T = 250-830 K and as a function of pressure at T = 301 K in the pressure range 1.0-10.4 Torr. The rate constant of the reaction OH + CH3C(O)CH2OH -> products (1) was measured using both absolute (from the kinetics of OH consumption in excess of hydroxyacetone) and relative rate methods (k(1) = 4.7 x 10(-22) x T-3.25 exp (1410/T) cm(3) molecule(-1) s(-1) at T = 250-830 K). The present data combined with selected previous temperature-dependent studies of reaction (1) yield k(1) = 4.4 x 10(-20) x T-2.63 exp (1110/T) cm(3) molecule(-1) s(-1), which is recommended from the present work at T = 230-830 K (with conservative uncertainty of 20% at all temperatures). k(1) was found to be independent of the pressure in the range from 1.0 to 10.4 Torr of He at T = 301 K. The present results are compared with previous experimental and theoretical data.
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https://hal.archives-ouvertes.fr/hal-02559832
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Submitted on : Thursday, December 3, 2020 - 4:04:02 PM
Last modification on : Wednesday, December 9, 2020 - 1:26:58 PM
Long-term archiving on: : Thursday, March 4, 2021 - 7:31:51 PM

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Yuri Bedjanian. Temperature-Dependent Kinetic Study of the Reaction of Hydroxyl Radicals with Hydroxyacetone. Journal of Physical Chemistry A, American Chemical Society, 2020, 124 (14), pp.2863-2870. ⟨10.1021/acs.jpca.0c00429⟩. ⟨hal-02559832⟩

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