Dynamical Study of Reactive Absorption of Gaseous Species

气态物质反应吸收的动力学研究

• 批准号: 10450293
• 负责人: KODA Seiichiro
• 金额: $ 8.06万
• 依托单位: THE UNIVERSITY OF TOKYO
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10450293/
• 关键词: Reactive Absorption; Uptake; Surface Process; Surface Species; Gaseous Trace Species; Impinging Flow Method; Laser-induced Ionization; Surface Desorption Mass-spectrometry

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.

1.传质过程是化学反应工程中与反应性吸收有关的重要基本速率过程之一，也是大气中痕量气体向气溶胶表面的吸收过程。本研究的目的是利用新型撞击流方法测量吸收系数，理解基于液相化学反应的过程，并发展利用激光光谱和/或质谱方法直接测量表面物种的技术.本文采用撞击流法测定了大气化学中重要的痕量卤素物种的吸收系数。特别是，在不同的条件下，测量了I-22 - 22-D2的吸收系数，并通过新设计的数值模拟方法进行了分析。研究发现，吸收过程受液相化学反应控制.发展了表面物种直接测量技术。它们是液相表面物种的多光子电离法和低温制备的冰等固体表面物种的表面解吸质谱法。这些新技术还不能完全建立起来，但它们的潜力已经清楚地显示出来。

项目成果

高見昭憲(A.Takami): "Measurement of uptake coefficient of I_2 to the aqueous surface"J.Aerosol Sci.. Vol29 Suppl,I. 5895-5896 (1998)

A.Takami：“I_2 到水表面的吸收系数的测量”J.Aerosol Sci..Vol29 Suppl，I.5895-5896(1998)

高見昭憲(A.Takami): "Measurement of uptake coefficient of I_2 to the aqueous surface" J.Aerosol Sci.Vol.29 Suppl.1. 5895-5896 (1998)

A.Takami：“I_2 到水表面的吸收系数的测量”J.Aerosol Sci.Vol.29 Suppl.1 (1998)。

高見昭憲(A.Takami): "Measurement of uptake coefficient of l_2 to the aqueous surface" J.Aerosol Sci.Vol.29 Sappl.1. S895-S896 (1998)

A.Takami：“l_2 到水表面的吸收系数的测量”J.Aerosol Sci.Vol.29 Sappl.1 (1998)。

A. Takami, A Kado and S. Koda: "Measurement of Uptake Coefficient of IィイD22ィエD2 to the Aqueous Surface"J. Aerosol Sci.. Vol. 29, Suppl. 1. S895-S896 (1998)

A. Takami、A Kado 和 S. Koda：“IiD22 到水表面的吸收系数的测量”J. Aerosol Sci.. 第 29 卷，增刊 1. S895-S896 (1998)