Journal
ATMOSPHERIC ENVIRONMENT
Volume 44, Issue 11, Pages 1478-1481Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.atmosenv.2010.01.040
Keywords
POCP; Hydrofluorocarbons; CFC-replacements; Hydrofluoroolefins; R-1234yf; HFC-1234yf; HFO-1234yf
Funding
- Danish Natural Science Research Council
- Villum Kann Rasmussen Foundation for the Copenhagen Center for Atmospheric Research (CCAR)
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The photochemical ozone creation potentials (POCPs) for CF3CF=CH2 and other commercially significant hydrofluoroolefins have been estimated for the first time. CF3CF=CH2 (HFO-1234yf) has a POCP of 7.0 which is less than that for ethane (12.3) and greater than for methane (0.6). Methane and ethane have sufficiently low POCPs that they are usually considered unreactive with respect to ozone formation in urban areas and accordingly are exempt from volatile organic compound (VOC) emission regulations. Estimated POCPs for other hydrofluoroolefins are: CH2=CF2, 18.0; CF2=CF2, 12.5; CH2=CHCF3, 10.7; CF2=CFCF3, 5.4; Z-CHF=CFCF3, 5.6; E-CHF=CFCF3, 7.3; CH2=CHCF2CF3, 6.6; and t-CHF=CHCF3, 6.4. (C) 2010 Elsevier Ltd. All rights reserved.
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