| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
Iodofluorocarbons (IFCs) have recently attracted attention as one of new candidates for a replacement for chlorofluorocarbons and bromofluorocarbons. Thus, it is very important for the practical and industrial use of IFCs to know the atmospheric removal processes of IFCs emitted into the atmosphere. In this study, the rate constants of reactions of nitrate radicals (NO3) with CF2HI, CF3CH2I, CF3(CH2)2I and CF3(CH2)3I that are included in IFCs were determined. The result suggests that these IFCs were removed from the atmosphere via the reaction with NO3 within a few ten hours. The values of the absorption cross sections and the features of absorption spectra of these IFCs were also experimentally determined. The result suggests that these IFCs were removed by the sunlight photolysis within a few ten to hundreds hours.
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