Kinetic Study of the Reactions between OH Radicals and three 2-Butenes over the Temperature Range 220 K to 370 K and Pressure Range 5 Torr to 300 Torr.

Published

January 24, 2023

Author(s)

Vladimir L. Orkin, Michael J. Kurylo III, Victor Khamaganov

Abstract

Gas phase reactions between OH radicals and three 2-Butenes were studied using a flash photolysis resonance-fluorescence technique over the temperature range 220 K to 370 K. Rate constants of OH reactions with cis-2-buten and trans-2-butene were found to exhibit a pressure dependence at room temperature and above. Kinetic parameters k0(T) and kꝏ(T) describing termolecular rate constants were derived for both reactions. The OH rate constants at room temperature and at 1 atmosphere pressure are kZ (298 K, 1 atm) = (5.61 ± 0.14)×10-11, cm3molecule-1s-1 and kE(298 K, 1 atm) = (6.40 ± 0.19)×10-11, cm3molecule-1s-1, respectively. The rate constant of OH reaction with 2,3-dimethyl-2-butene was found to be pressure independent and can be represented as kTME(T) = 14.64×10-11×(T/298)^-1.745×exp(-103/T), cm3molecule-1s-1 with kTME(298 K) = (10.37 ± 0.31)×10-11, cm3molecule-1s-1 All total uncertainties include both two standard errors (statistical) and the estimated systematic error

Citation

International Journal of Chemical Kinetics

Pub Type

Journals

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Keywords

hydroxyl, OH, (E)-2-butene, (Z)-2-butene, 2, 3-dimethyl-2-butene.

Citation

Orkin, V. , Kurylo III, M. and Khamaganov, V. (2023), Kinetic Study of the Reactions between OH Radicals and three 2-Butenes over the Temperature Range 220 K to 370 K and Pressure Range 5 Torr to 300 Torr., International Journal of Chemical Kinetics, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=933442 (Accessed December 14, 2024)