ATMOSPHERIC CHEMISTRY OF HYDROFLUOROCARBONS

The following sections are included:

• Introduction

• Experimental

  • Pulse Radiolysis System

  • Fourier Transform Infrared System

• UV Spectra of Fluorinated Peroxy Radicals

• Kinetics of the Reactions of CH₂FO₂, CHF₂O₂, CF₃O₂, CF₃CF₂O₂, CF₂HCF₂O₂ and CF₃CFHO₂ with NO

• FTIR Product Studies of the Cl Atom Initiated Oxidation of a Series of HFCs

  • CH₃F (HFC-41)

    • FTIR Study of the Cl Atom Initiated Oxidation of CH₃F

    • Implications for the Atmospheric Chemistry of CH₃F

  • CH₂F₂ (HFC-32)

    • FTIR Study of the Cl Atom Initiated Oxidation of CH₂F₂

    • Implications for the Atmospheric Chemistry of CH₂F₂

  • CF₃H (HFC-23)

    • FTIR Study of the F Atom Initiated Oxidation of CF₃H

    • Implications for the Atmospheric Chemistry of CF₃H

  • CF₃CF₂H (HFC-125)

    • FTIR Study of the Cl Atom Initiated Oxidation of CF₃CF₂H

    • Implications for the Atmospheric Chemistry of CF₃CF₂H

  • CHF₂CHF₂ (HFC-134)

    • FTIR Study of the Cl Atom Initiated Oxidation of CHF₂CHF₂

    • Implications for the Atmospheric Chemistry of CHF₂CHF₂

  • CF₃CFH₂ (HFC-134a)

    • FTIR Study of the Cl and F Atom Initiated Oxidation of CF₃CFH₂

    • The Effect of Total Pressure

    • The Effect of Temperature

    • Dark Chemistry; Evidence for the Formation of CF₃CFHO₃CF₃

    • Source of CF₃OH

    • Atmospheric Fate of CF₃O Radicals: Reaction with H₂O

    • Atmospheric Chemistry of CF₃O Radicals

    • Implications for the Atmospheric Chemistry of HFC-134a

• Conclusions and Suggestions for Future Work

• Acknowledgments

• References