Atmospheric Lifetime and Global Warming Potential of a Perthuoropolyether
Young, CI; Hurley, MD; Wallington, TJ; Mabury, SA
| HERO ID | 623974 |
|---|---|
| In Press | No |
| Year | 2006 |
| Title | Atmospheric Lifetime and Global Warming Potential of a Perthuoropolyether |
| Authors | Young, CI; Hurley, MD; Wallington, TJ; Mabury, SA |
| Journal | Environmental Science & Technology |
| Volume | 40 |
| Issue | 7 |
| Page Numbers | 2242-2246 |
| Abstract | Perfluoropolyethers (PFPEs) are a family of perfluorinated fluids used mainly in industrial applications. Lower molecular weight commercial PFPE fractions have boiling points ranging between 55 and 270 °C, and have the potential to escape into the atmosphere. To improve our understanding of the atmospheric chemistry of PFPEs, a distilled fraction of a commercial mixture containing perfluoropolymethylisopropyl ethers (PFPMIEs) was introduced into an atmospheric chamber system. Relative rate techniques were used to determine upper limits for the rate constants for reactions of OH and Cl with PFPMIE in 700 Torr of air at 296 K. The reactivity of PFPMIE with Cl was less than 2 · 10-17 cm³ molecule<sup>-1</sup> s<sup>-1</sup>, while the reactivity with OH was less than 6.8 · 10<sup>-16</sup> cm· molecule<sup>-1</sup> s<sup>-1</sup>, indicating low reactivity in the troposphere. Consequently, the lifetime of PFPMIE should be limited by transport to the mesosphere, where photolysis by Lyman-α radiation at 121.6 nm will be efficient. By analogy to perfluorinated alkanes, the lower limit for the total atmospheric lifetime is 800 years. PFPMIE was shown to have instantaneous radiative forcing of 0.65 W m<sup>-2</sup> ppb<sup>-1</sup>, which corresponds to a global warming potential on a 100 year time scale of 9000 relative to CO2 and 1.95 relative to CFC-11. [ABSTRACT FROM AUTHOR] Copyright of Environmental Science & Technology is the property of American Chemical Society and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| Doi | 10.1021/es052077z |
| Pmid | 16646459 |
| Wosid | WOS:000236691600039 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Scopus URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-33645764699&doi=10.1021%2fes052077z&partnerID=40&md5=83c1863f64991ccd1d2696a6feb71af7 |
| Is Public | Yes |
| Language Text | English |
| Keyword | POLYETHERS; FLUORINE compounds; GLOBAL warming; CLIMATOLOGY; GLOBAL temperature changes; AIR -- Pollution; ENVIRONMENTAL degradation; GREENHOUSE effect, Atmospheric; ATMOSPHERIC temperature |
| Is Qa | No |