High Accuracy OH Reaction Rate Constants of CH2=CF-CF3 and trans-CHF=CF-CF3 and IR Absorption Spectra

Published

April 29, 2010

Author(s)

Vladimir L. Orkin, Larissa E. Martynova, Alexander N. Ilichev

Abstract

Rate constants for the gas phase reactions of OH radicals with two isomers of tetrafluoropropene, CH2=CF-CF3 (k1) and trans-CHF=CH-CF3 (k2); were measured using a flash photolysis resonance-fluorescence technique over the temperature range 220 K to 370 K. The Arrhenius plots were found to exhibit a noticeable curvature. The temperature dependences of the rate constants are very weak and can be represented by the following expressions over the indicated temperature intervals: cm3 molecule-1 s-1 cm3 molecule-1 s-1 cm3 molecule-1 s-1 The atmospheric lifetimes due to reactions with tropospheric OH were estimated to be 12 and 19 days respectively under assumption of the well mixed atmosphere. IR absorption cross-sections were measured for both compounds and their global warming potentials were estimated.

Citation

Journal of Physical Chemistry A

Pub Type

Journals

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Keywords

hydroxyl radical, atmospheric lifetime, GWP, greenhouse effect, 2, 3, 3, 3-tetrafluoropropene, trans-1, 3, 3, 3-tetrafluoropropene, C3H2F4.

Citation

Orkin, V. , Martynova, L. and Ilichev, A. (2010), High Accuracy OH Reaction Rate Constants of CH2=CF-CF3 and trans-CHF=CF-CF3 and IR Absorption Spectra, Journal of Physical Chemistry A, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=832429 (Accessed October 25, 2025)