2015 Fiscal Year Final Research Report
Study of the mechanisms and iodide substitution effects of reactions of iodofluorocarbons with nitrate radical
Project/Area Number |
25340003
|
Research Category |
Grant-in-Aid for Scientific Research (C)
|
Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Environmental dynamic analysis
|
Research Institution | Tokyo Gakugei University |
Principal Investigator |
Nakano Yukio 東京学芸大学, 教育学部, 准教授 (50364112)
|
Project Period (FY) |
2013-04-01 – 2016-03-31
|
Keywords | 大気化学 / 反応速度 / 物質循環 / ヨウ素 |
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.
|
Free Research Field |
化学反応速度論
|