DOI: 10.1016/j.atmosenv.2014.07.033
Scopus记录号: 2-s2.0-84904440183
论文题名: Atmospheric chemistry of HFE-7300 and HFE-7500: Temperature dependent kinetics, atmospheric lifetimes, infrared spectra and global warming potentials
作者: Rodríguez A ; , Rodríguez D ; , Moraleda A ; , Bravo I ; , Moreno E ; , Notario A
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 96 起始页码: 145
结束页码: 153
语种: 英语
英文关键词: Atmospheric lifetimes
; HFE-7300
; HFE-7500
; Infrared spectra
; Radiative efficiencies
; Reaction mechanism
Scopus关键词: Atmospheric chemistry
; Atmospheric pressure
; Atmospheric radiation
; Chemical analysis
; Free radicals
; Global warming
; Industrial applications
; Kinetics
; Spectroscopy
; Atmospheric lifetime
; HFE-7300
; HFE-7500
; Infrared spectrum
; Radiative efficiency
; Reaction mechanism
; Reaction kinetics
; flurothyl
; flurothyl 7300
; flurothyl 7500
; hydroxyl radical
; unclassified drug
; air temperature
; atmospheric chemistry
; atmospheric pollution
; ether
; global warming
; industrial emission
; infrared radiation
; reaction kinetics
; spectrum
; air temperature
; article
; atmospheric pressure
; greenhouse effect
; greenhouse gas
; infrared radiation
; kinetics
; lifespan
; mass fragmentography
; oxidation
; photolysis
; priority journal
; radiative forcing
; reaction analysis
; temperature dependence
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: The atmospheric degradation of two hydrofluoroethers, HFE-7300 [n-C2F5CF(OCH3)CF(CF3)2] and HFE-7500 [n-C3F7CF(OC2H5)CF(CF3)2] used in industrial applications has been studied. The kinetics and reaction products were determined at atmospheric pressure as a function of temperature in a reaction chamber using GC/FID and GC/MS techniques for the analysis. The following Arrhenius expressions were obtained (in units of cm3molecule-1s-1): kHFE-7300+OH=(5.6±2.0)×10-13 exp(-(1186±111)/T); kHFE-7300+Cl=(3.8±1.3)×10-12 exp(-(968±101)/T); and kHFE-7500+OH=(7.6±6.0)×10-12 exp(-(1163±385)/T) (temperature range 271-333K). The atmospheric lifetimes calculated from kinetic data for HFE-7300 and HFE-7500 were 5.24 and 0.30 years, respectively. In the oxidation of HFE-7300 with OH and Cl radicals, the only detected product was CF3CF2CF(OCHO)CF(CF3)2, whereas in the oxidation of HFE-7500 by OH radicals the detected products were: C3F7CF(OC(O)CH3)CF(CF3)2 and C3F7CF(OC(O)H)CF(CF3)2. Infrared spectra of the studied HFEs have also been measured and radiative forcing efficiencies were determined. Combining these results with the kinetic data, we estimated 100-year time horizon global warming potentials of 440 and 12 for HFE-7300 and HFE-7500, respectively. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81147
Appears in Collections: 气候变化事实与影响
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作者单位: Faculty of Environmental Sciences and Biochemistry, University of Castilla La Mancha, Avenida Carlos III, s/n, 45071 Toledo, Spain; Faculty of Pharmacy, Physical Chemistry Department, University of Castilla La Mancha, Campus de Albacete, Edificio Polivalente, s/n, 02071 Albacete, Spain; Institute of Structure of Matter, Molecular Physics Department, CSIC, Serrano 121, 28006 Madrid, Spain; Faculty of Chemical Sciences, University of Castilla La Mancha, Avenida Camilo José Cela 10, 13071 Ciudad Real, Spain
Recommended Citation:
Rodríguez A,, Rodríguez D,, Moraleda A,et al. Atmospheric chemistry of HFE-7300 and HFE-7500: Temperature dependent kinetics, atmospheric lifetimes, infrared spectra and global warming potentials[J]. Atmospheric Environment,2014-01-01,96