Fluid phase interface properties of acetone, oxygen, nitrogen and their binary mixtures by molecular simulation.

Fluid phase interface properties of acetone, oxygen, nitrogen and their binary mixtures by molecular simulation.
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通过分子模拟研究丙酮、氧气、氮气及其二元混合物的流体相界面性质

DOI:
10.1039/c5cp03415a
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发表时间:
2015
期刊:
Physical chemistry chemical physics : PCCP
影响因子:
--
通讯作者:
J. Vrabec
J. Vrabec
中科院分区:
--
文献类型:
--
作者:
S. Eckelsbach;J. Vrabec

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用分子动力学(MD)模拟方法研究了纯物质丙酮、氧气和氮气及其二元混合物的汽液平衡。因此,特别注意在分子水平上的界面行为,产生总的和部分的密度分布以及表面张力数据。采用经典的货车德瓦尔斯方法分析了总密度分布。据发现,需要一个扩展的功能来描述这些配置文件为含丙酮的混合物,由于强吸附的挥发性组分在蒸汽侧的界面。在此基础上研究了界面厚度。表面张力的结果进行比较,实验数据,其相关性和其他分子的方法的结果。由于缺乏实验,降落伞的方法来获得预测的表面张力数据的混合物。按照相同的方法,本表面张力的结果与含有丙酮的混合物。
Vapor–liquid equilibria (VLE) of the pure substances acetone, oxygen and nitrogen as well as their binary mixtures are studied by molecular dynamics (MD) simulation with a direct approach. Thereby, particular attention is paid to the interface behavior on the molecular level, yielding total and partial density profiles as well as surface tension data. The classical approach by van der Waals is used to analyze the total density profiles. It is found that an extended function is needed to describe those profiles for the mixtures containing acetone, due to the strong adsorption of the volatile component at the vapor side of the interface. Based on these representations the interface thickness is studied. The surface tension results are compared to experimental data, correlations thereof and results from other molecular approaches. Due to the scarcity of experiments, the parachor method is employed to obtain predictive surface tension data for the mixtures. Following the same approach, the present surface tension results are correlated for the mixtures containing acetone.
含有氮气、氧气、二氧化碳和乙烷的混合物的汽液平衡
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