Chemical transformation of organic amines released into the atmosphere

• Project/Area Number: 15H02809
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Environmental dynamic analysis
• Research Institution: National Institute for Environmental Studies
• Principal Investigator: IMAMURA Takashi 国立研究開発法人国立環境研究所, 環境計測研究センター, フェロー (60184826)
• Research Collaborator: SATO kei ; FURUHAMA Ayako ; UCHIDA Risa
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥16,640,000 (Direct Cost: ¥12,800,000、Indirect Cost: ¥3,840,000); Fiscal Year 2017: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000); Fiscal Year 2016: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000); Fiscal Year 2015: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
• Keywords: 有機アミン / 大気反応 / O3 / OHラジカル / アルキルアミノラジカル / ニトロソアミン / 反応速度 / アルキルアミン / O3反応 / OHラジカル生成 / 反応速度係数 / 有機アミノラジカル / オゾン反応 / 量子化学計算 / 大気化学 / 環境質定量化・予測 / 反応化学 / 環境変動 / OHラジカル反応

Outline of Final Research Achievements

We measured the rate constants for the reactions of alkyl amines with OH radical and O3 to estimate the atmospheric lifetimes of amines. It was found that OH radicals were produced in the O3+alkyl amine reactions and that OH yield in the reaction with secondary amine was larger than those in the reactions with primary and tertiary amines. The rate coefficients for the reactions of R2N (R = CH3 and C2H5) radical with NO and NO2 were measured by using a time-resolved mass spectrometry.

Academic Significance and Societal Importance of the Research Achievements

化学吸収法を利用した二酸化炭素の回収と貯留（CCS）技術からの有機アミン類の大気への放散による大気質の影響を評価するための、大気反応モデルに必要な基本的な化学反応データを整備できた。また必要な反応データを取得するための方法論が確立したことから、実際のCCS技術で使用されるアミン類やその劣化物を用いて、大型大気反応チャンバーでの有機アミンの大気反応実験から、有機アミン類の大気質への影響評価への道を開いた。

Research Products

• [Journal Article] Theoretical study of initial reactions of aminie (CH3)nNH(3-n) (n = 1, 2, 3) with ozone (2018)
  • Author(s): A. Furuhama, T. Imamura, S. Maeda, T. Taketsugu
  • Journal Title: Chemical Physics Letters Volume: 692 Pages: 111-116
  • Peer Reviewed / Open Access
• [Presentation] OH radical formation from the reactions of ozone with dimethyl and trimethyl amines (2018)
  • Author(s): T. Imamura, A. Furuhama, K. Sato
  • Organizer: 25th International Symposium on Gas Kinetics and Related Phenomena
  • Int'l Joint Research
• [Presentation] メチルアミン類のオゾン反応からのOHラジカル生成 (2018)
  • Author(s): 今村隆史、佐藤圭、古濱彩子
  • Organizer: 第12回分子科学討論会
• [Presentation] 第1、2、3級アミンとO3の反応速度定数に関する理論的考察 (2016)
  • Author(s): 古濱彩子、今村隆史、前田理、武次徹也
  • Organizer: 第10回分子科学討論会
  • Place of Presentation: 神戸ファッションマート（兵庫県神戸市）
  • Year and Date: 2016-09-13
• [Presentation] Reactions of ethylamines with ozone: Rate constants and OH formation yield (2016)
  • Author(s): T. Seta, K. Sato , T. Imamura
  • Organizer: 24th International Symposium on Gas Kinetics and Related Phenomena
  • Place of Presentation: University of York (York, UK)
  • Year and Date: 2016-07-19
  • Int'l Joint Research
• [Presentation] Gas phase reactions of alkyl amines in the atmosphere (2015)
  • Author(s): T. Imamura, K. Sato, T. Seta
  • Organizer: 2015 International Chemical Congress of Pacific Basin Societies (Pacifichem 2015)
  • Place of Presentation: Hawaii Convention Center (Hawaii, USA)
  • Year and Date: 2015-12-20
  • Int'l Joint Research / Invited
• [Presentation] Reaction pathway of amine [(CH3)nNH(3-n), n=1,2,3] and ozone (2015)
  • Author(s): A. Furuhama, T. Imamura, S. Maeda, T. Taketsugu
  • Organizer: 31st Symposium on Chemical Kinetics and Dyanmics
  • Place of Presentation: 北海道大学（北海道札幌市）
  • Year and Date: 2015-06-03
  • Int'l Joint Research