Atmospheric chemistry for gas-phase reactions of cyc-CF2CF2CF2CHXCHX– (X = H or F) with OH radicals in the temperature range of 253–328 K

Qin Guo, Ni Zhang, Tadafumi Uchimaru, Liang Chen*, Hengdao Quan, Junji Mizukado

*此作品的通讯作者

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摘要

Rate constants for the gas-phase reactions of cyc-CF2CF2CF2CH2CH2– with the OH radicals were assessed by a relative rate method in the temperature range of 253–328 K, from which k1(T) = (8.52 ± 1.58) × 10−13 exp [(–1017 ± 53)/T] was derived for the Arrhenius equation. Its atmospheric lifetime was 1.6 years. The estimated photochemical ozone creation potentials (POCP) were 0.211 and 0.076 for North-west European and USA urban conditions, respectively. The radiative efficiency (RE) was measured as 0.200 W m−2 ppb−1, and the global warming potential (GWP) of the 100-year time horizon was estimated to be 107. The atmospheric oxidation mechanism of cyc-CF2CF2CF2CH2CH2– was studied by the experimental method. COF2, CO, and CO2 were identified as the main carbon-containing products. Additionally, the degradation mechanism of two analogous compounds, cyc-CF2CF2CF2CHFCH2– and cis-cyc-CF2CF2CF2CHFCHF–, were also investigated. COF2, HC(O)F, CO, and CO2 were observed as the main products.

源语言英语
文章编号116895
期刊Atmospheric Environment
215
DOI
出版状态已出版 - 15 10月 2019

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