The ozone formation potential of 1-bromo-propane.
1-Bromo-propane (1-BP) is a replacement for high-end chlorofluorocarbon (HCFC) solvents. Its reaction rate constant with the OH radical is, on a weight basis, significantly less than that of ethane. However, the overall smog formation chemistry of 1-BP appears to be very unusual compared with typical volatile organic compounds (VOCs) and relatively complex because of the presence of bromine. In smog chamber experiments, 1-BP initially shows a faster ozone build-up than what would be expected from ethane, but the secondary products containing bromine tend to destroy ozone such that 1-BP can have a net overall negative reactivity. Alternative sets of reactions are offered to explain this unusual behavior. Follow-up studies are suggested to resolve the chemistry. Using one set of bromine-related reactions in a photochemical grid model shows that 1-BP would be less reactive toward peak ozone formation than ethane with a trend toward even lower ozone impacts in the future.
Whitten
Gary Z
GZ
Systems Applications International, Inc., Point Reyes Station, California, USA. garywhitten@icfconsulting.com
Cohen
Jonathan P
JP
Myers
Thomas C
TC
Carter
William P L
WP
D000393:Air Pollutants; D004777:Environment; D006842:Hydrocarbons, Brominated / Q000737:chemistry*; D008962:Models, Theoretical; D010083:Oxidants, Photochemical / Q000737:chemistry*; D010126:Ozone / Q000737:chemistry*; D012905:Smog; D012997:Solvents / Q000737:chemistry*; D014481:United States; D014484:United States Environmental Protection Agency
D000393:Air Pollutants; D006842:Hydrocarbons, Brominated; D010083:Oxidants, Photochemical; D012905:Smog; D012997:Solvents; D010126:Ozone; C118559:1-bromopropane