Dynamical Study of Reactive Absorption of Gaseous Species

1. 传质过程是与化学反应工程中的反应吸收以及气态微量物质从大气到气溶胶表面的吸收相关的非常重要的基本速率过程之一。本研究旨在使用新型冲击流方法测量吸收系数，了解基于液相化学反应的过程，并开发使用激光光谱和/或质谱方法直接测量表面物质的技术。 2．卤素物种是大气化学中重要的大气痕量物种，采用撞击流法测量了卤素物种的吸收系数。特别是，在各种条件下测量了D22的吸收系数，并通过新设计的数值模拟方法进行了分析。发现吸收过程受液相化学反应控制。 3．开发了直接测量表面物质的技术。它们是液相表面上的表面物质的多光子电离方法，以及低温制备的冰等固体表面上的物质的表面解吸质谱法。这些新技术无法完全建立，但它们的潜力已得到明确证明。

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.