Density and Volumetric Properties of Binary Mixtures of CO2 Hexadecane from (303.2 to 473.2) K and Pressures up to 50.0 MPa
Density and Volumetric Properties of Binary Mixtures of CO2 Hexadecane from (303.2 to 473.2) K and Pressures up to 50.0 MPa
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(303.2 至 473.2) K 压力高达 50.0 MPa 的 CO2 十六烷二元混合物的密度和体积特性
DOI：
10.1021/acs.jced.9b00078
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发表时间：
2019
影响因子：
--
通讯作者：
Zhou Qian
中科院分区：
文献类型：
--
作者：
Yang Panrui;Guo Huirong;Wang Zhe;Zhou Qian
采用毛细管高压光学池法在 303.2 至 473.2 K 温度和 50.0 MPa 压力下测量 CO2+ 十六烷二元混合物的密度，其中 CO2 摩尔分数 x1= 0、0.2555、0.3703、0.7348 和 0.8645。 CO2+十六烷混合物的密度和过量摩尔体积与压力呈正相关函数，与温度呈负相关函数。 CO2的溶解在低温下增加了混合物的密度，在高温下降低了混合物的密度。交叉温度随着压力的增加而增加。拟合了纯物质的扰动链统计关联流体理论(PC-SAFT)参数，利用PC-SAFT模型可以准确计算CO2+十六烷混合物的密度。
Densities of CO2+ hexadecane binary mixtures were measured by the capillary high-pressure optical cell method at temperatures from 303.2 to 473.2 K and pressures up to 50.0 MPa with CO2molar fractionsx1= 0, 0.2555, 0.3703, 0.7348, and 0.8645. The density and excess molar volume of CO2+ hexadecane mixtures are the positive correlation function of pressure and the negative correlation function of temperature. The dissolution of CO2increases the density of mixtures at low temperatures and decreases the density of mixtures at high temperatures. The crossover temperature increases with increasing pressure. The perturbed-chain statistical associating fluid theory (PC-SAFT) parameters of pure substances were fitted, and the densities of CO2+ hexadecane mixtures can be calculated accurately with the PC-SAFT model.