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oa Atmospheric chemistry of E- and Z-CF3CH = CHCF3
- Publisher: Hamad bin Khalifa University Press (HBKU Press)
- Source: QScience Proceedings, Qatar University Life Science Symposium 2016: Biodiversity, Sustainability and Climate Change, with Perspectives from Qatar, Nov 2016, Volume 2016, 49
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Abstract
FTIR smog chamber experiments were performed to investigate the atmospheric fate of E- and Z-CF3CH = CHCF3 (1,1,1,4,4,4-hexafluoro-2-butene). The experiments were performed to study reactions of E-CF3CH = CHCF3 or Z-CF3CH = CHCF3 with Cl atoms, OH radicals, and O3 in 700 Torr of N2/O2 diluents at 296 ± 2 K. The study determined the Cl atom, OH radical, and O3 kinetics and the mechanism of the atmospheric oxidation of E- and Z-CF3CH = CHCF3. The main atmospheric fate for both compounds is reaction with OH radicals. Atmospheric chemistry of the reaction of Z-CF3CH = CHCF3 with OH and OD radicals were investigated by Baasandorj et al. in 2011, no other previous studies are available. The results of the present study are compared to the findings of Baasandorj et al. assessing the atmospheric impact of E- and Z-CF3CH = CHCF3. Infrared spectra were recorded, and the atmospheric lifetimes, the radiative forcings and global warming potentials (GWP) of the two butenes were calculated. This study provides a comprehensive description of the atmospheric fate of E- and Z-CF3CH = CHCF3. We present here the first results on the atmospheric chemistry of E-CF3CH = CHCF3 and of the Cl- and O3-initiated chemistry of Z-CF3CH = CHCF3.