Orkin, V.
, Khamaganov, V.
and Guschin, A.
(2014),
Photochemical Properties of Hydrofluoroethers CH3OCHF2, CH3OCF3, and CHF2OCH2CF3: Reactivity toward OH, IR Absorption Cross Sections, Atmospheric Lifetimes and Global Warming Potentials, Atmospheric Environment, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=909717
(Accessed December 22, 2024)
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Photochemical Properties of Hydrofluoroethers CH3OCHF2, CH3OCF3, and CHF2OCH2CF3: Reactivity toward OH, IR Absorption Cross Sections, Atmospheric Lifetimes and Global Warming Potentials
Published
Author(s)
, , A G. Guschin
Abstract
Rate constants for the gas phase reactions of OH radicals with three partially fluorinated ethers, CH3OCF3 (kHFE-143a), CH3OCHF2 (kHFE-152a), and CHF2OCH2CF3 (kHFE-245fa), were measured using a discharge flow electron paramagnetic resonance technique over the temperature range 298 K to 460 K. The temperature dependences of the rate constants can be represented by the following. 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 5.1, 1.8, and 5.4 years respectively. The IR absorption cross-sections of the three fluorinated ethers were measured between 400 cm 1 and 2000 cm-1 and their global warming potentials were estimated.Citation
Atmospheric Environment
Pub Type
Journals
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Keywords
hydroxyl, fluorinated ether, atmospheric lifetime, IR spectra, global warming potential
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Created September 22, 2014, Updated March 17, 2017