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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Phase State and Saturation Vapor Pressure of Submicron Particles of meso-Erythritol at Ambient Conditions
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Phase State and Saturation Vapor Pressure of Submicron Particles of meso-Erythritol at Ambient Conditions

机译：环境条件下中赤藓糖醇亚微米颗粒的相态和饱和蒸气压

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摘要

meso-Erythritol is a sugar alcohol identified in atmospheric aerosol particles. In this work, evaporation of submicron-sized particles of meso-erythritol was studied in a TDMA system including a laminar flow tube under dry conditions at five temperatures (278-308 K) and ambient pressure. A complex behavior was observed and attributed to the formation of particles of three different phase states: (1) crystalline, (2) subcooled liquid or amorphous, and (3) mixed. With respect to saturation vapor pressure, the subcooled liquid and amorphous states are treated to be the same. The particle phase state was linked to initial particle size and flow tube temperature. Saturation vapor pressures of two phase states attributed to the crystalline and subcooled liquid state respectively are reported. Our results suggest a mass accommodation coefficient close to one for both states.
机译：内消旋赤藓糖醇是一种在大气气溶胶颗粒中鉴定出的糖醇。在这项工作中，在包括层流管的TDMA系统中，在干燥条件下，在五个温度（278-308 K）和环境压力下，研究了亚甲基赤藓糖醇的亚微米级颗粒的蒸发。观察到复杂的行为，并且归因于三种不同相态的颗粒的形成：（1）结晶;（2）过冷的液体或无定形;（3）混合。关于饱和蒸气压，过冷的液体和非晶态被视为相同。颗粒相态与初始颗粒大小和流量管温度有关。报告了分别归因于结晶态和过冷液态的两个相态的饱和蒸气压。我们的结果表明两种状态的质量调节系数均接近1。

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