title: Atmospheric chemistry of short-chain haloolefins: photochemical ozone creation potentials (POCPs), global warming potentials (GWPs), and ozone depletion potentials (ODPs).
abstract: Short-chain haloolefins are being introduced as replacements for saturated halocarbons. The unifying chemical feature of haloolefins is the presence of a CC double bond which causes the atmospheric lifetimes to be significantly shorter than for the analogous saturated compounds. We discuss the atmospheric lifetimes, photochemical ozone creation potentials (POCPs), global warming potentials (GWPs), and ozone depletion potentials (ODPs) of haloolefins. The commercially relevant short-chain haloolefins CF3CFCH2 (1234yf), trans-CF3CHCHF (1234ze(Z)), CF3CFCF2 (1216), cis-CF3CHCHCl (1233zd(Z)), and trans-CF3CHCHCl (1233zd(E)) have short atmospheric lifetimes (days to weeks), negligible POCPs, negligible GWPs, and ODPs which do not differ materially from zero. In the concentrations expected in the environment their atmospheric degradation products will have a negligible impact on ecosystems. CF3CFCH2 (1234yf), trans-CF3CHCHF (1234ze(Z)), CF3CFCF2 (1216), cis-CF3CHCHCl (1233zd(Z)), and trans-CF3CHCHCl (1233zd(E)) are environmentally acceptable.
authors: System Analytics and Environmental Sciences Department, Ford Motor Company, Mail Drop RIC-2122, Dearborn, MI 48121-2053, USA. Electronic address: twalling@ford.com.
authors: T J
authors: TJ
authors: Wallington
authors: Department of Chemistry and Biochemistry, California State University Northridge, 18111 Nordhoff St., Northridge, CA 91330-8262, USA.
authors: M P
authors: MP
authors: Sulbaek Andersen
authors: Copenhagen Center for Atmospheric Research, Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark.
authors: O J
authors: OJ
authors: Nielsen
mesh_terms: D000393:Air Pollutants / Q000737:chemistry*; D000475:Alkenes / Q000737:chemistry*; D057231:Climate Change; D004784:Environmental Monitoring; D006846:Hydrocarbons, Halogenated / Q000737:chemistry*; D010126:Ozone / Q000032:analysis*; D062966:Ozone Depletion
chemical_list: D000393:Air Pollutants; D000475:Alkenes; D006846:Hydrocarbons, Halogenated; D010126:Ozone
keywords: Atmospheric chemistry; Global warming potential (GWP); Hydrofluoroolefins; Ozone depletion potential (ODP); Photochemical ozone creation potential (POCP)