| Project/Area Number |
10450293
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
反応・分離工学
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| Research Institution | THE UNIVERSITY OF TOKYO |
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Principal Investigator |
KODA Seiichiro Graduate School of Engineering, The University of Tokyo, Professor, 大学院・工学系研究科, 教授 (10011107)
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| Co-Investigator(Kenkyū-buntansha) |
TAKAMI Akinori Graduate School of Engineering, The University of Tokyo, Research Assistant, 大学院・工学系研究科, 助手 (00262030)
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| Project Period (FY) |
1998 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥12,600,000 (Direct Cost: ¥12,600,000)
Fiscal Year 1999: ¥4,800,000 (Direct Cost: ¥4,800,000)
Fiscal Year 1998: ¥7,800,000 (Direct Cost: ¥7,800,000)
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| Keywords | Reactive Absorption / Uptake / Surface Process / Surface Species / Gaseous Trace Species / Impinging Flow Method / Laser-induced Ionization / Surface Desorption Mass-spectrometry |
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| Research Abstract |
1. Mass transfer process is one of the very important elementary rate processes relevant to reactive absorption in chemical reaction engineering and also the uptake of gaseous trace species from the atmosphere to aerosol surfaces. This research aimed at the measurements of uptake coefficients using the novel impinging flow method, the understanding of the process based on the liquid phase chemical reactions, and also tile development of the technology for direct measurement the surface species using laser spectroscopic and/or mass-spectroscopic methods.
2. Uptake coefficients of halogen species, which are important atmospheric trace species in atmospheric chemistry, were measured using the impinging flow method. In particular, the uptake coefficient of IィイD22ィエD2 was measured under various conditions, and analyzed by means of the newly devised numerical simulation method. The uptake process was found to be controlled by liquid phase chemical reactions.
3. Technology for direct measurement of surface species was developed. They were multiphoton ionization method of surface species on liquid phase surfaces, and surface desorption mass-spectrometry for species on solid surfaces such as ice prepared at low temperature. These new technology could not be completely established, however, the potentiality of them was clearly demonstrated.
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