当前位置：
X-MOL 学术
›
J. Chem. Eng. Data
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
High-Temperature and High-Pressure PVT Measurements of the Binary n-Hexane + Methyl Octanoate Mixture near the Critical Point of the Pure Solvent (n-Hexane)
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2022-08-04 , DOI: 10.1021/acs.jced.2c00325 Suleiman M. Rasulov 1 , Il’yas A. Isaev 1 , Ilmutdin M. Abdulagatov 2, 3
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2022-08-04 , DOI: 10.1021/acs.jced.2c00325 Suleiman M. Rasulov 1 , Il’yas A. Isaev 1 , Ilmutdin M. Abdulagatov 2, 3
Affiliation
|
PρT and phase transition properties (PS,ρS,TS) of the dilute binary mixture of n-hexane + methyl octanoate (at a concentration of 0.057 mol fraction of methyl octanoate) have been studied using the constant-volume piezometer technique. The measurements were performed along 16 liquid, vapor, and near-critical isochores between 32.38 and 615.57 kg·m–3 over a temperature range from 291 to 633 K at pressures up to 16 MPa. Measurements were concentrated in the immediate vicinity of the critical point of pure n-hexane and liquid–gas phase transition points (bubble and dew point curve) in order to study the effect of critical fluctuations in pure n-hexane on the thermodynamic properties of the dilute mixture and to closely observe the phase transition changes and precise measurements of the (PS,ρS,TS) and critical point (PC,ρC,TC) data. The measured critical property data for the mixture were used to study the isomorphic critical behavior of strongly (isothermal compressibility KTX and isobaric heat capacity CPX) and weakly (isochoric heat capacity CVX) singular properties along the critical isochore and the critical isotherm. The measured PρT data were also used to estimate the values of physical meaning (theoretically important) parameters, namely, characteristic reduced temperature 
and density differences 
of the mixture. Based on the measured critical property data, the value of the Krichevskii parameter Kkr has been estimated, which defines the structural (Nexc)and thermodynamic (
) properties of the dilute mixture near the critical point of the pure solvent (n-hexane).
中文翻译：
接近纯溶剂（正己烷）临界点的二元正己烷 + 辛酸甲酯混合物的高温和高压 PVT 测量
使用恒体积渗压计研究了正己烷+ 辛酸甲酯的稀二元混合物（辛酸甲酯浓度为 0.057 摩尔分数）的P ρ T和相变特性（P S ,ρ S , T S ）技术。测量是在291 到 633 K 的温度范围内，在高达 16 MPa 的压力下沿 32.38 到 615.57 kg·m –3之间的 16 个液体、蒸汽和近临界等距线进行的。测量集中在纯n临界点附近-己烷和液 - 气相转变点（泡点和露点曲线），以研究纯正己烷的临界波动对稀混合物热力学性质的影响，并密切观察相变变化和精确测量( P S ,ρ S , T S ) 和临界点 ( P C ,ρ C , T C ) 数据。混合物的测量临界性能数据用于研究强（等温压缩率K TX和等压热容C PX) 和弱（等容热容C VX）沿临界等容线和临界等温线的奇异性质。测量的P ρ T数据也用于估计物理意义（理论上重要）参数的值，即特征降低温度和密度差异的混合物。根据测量的临界特性数据，Krichevskii 参数K kr的值已被估计，它定义了结构 ( N exc ) 和热力学 () 接近纯溶剂（正己烷）临界点的稀混合物的性质。
更新日期：2022-08-04
and density differences of the mixture. Based on the measured critical property data, the value of the Krichevskii parameter Kkr has been estimated, which defines the structural (Nexc)and thermodynamic () properties of the dilute mixture near the critical point of the pure solvent (n-hexane).
中文翻译：
接近纯溶剂（正己烷）临界点的二元正己烷 + 辛酸甲酯混合物的高温和高压 PVT 测量
使用恒体积渗压计研究了正己烷+ 辛酸甲酯的稀二元混合物（辛酸甲酯浓度为 0.057 摩尔分数）的P ρ T和相变特性（P S ,ρ S , T S ）技术。测量是在291 到 633 K 的温度范围内，在高达 16 MPa 的压力下沿 32.38 到 615.57 kg·m –3之间的 16 个液体、蒸汽和近临界等距线进行的。测量集中在纯n临界点附近-己烷和液 - 气相转变点（泡点和露点曲线），以研究纯正己烷的临界波动对稀混合物热力学性质的影响，并密切观察相变变化和精确测量( P S ,ρ S , T S ) 和临界点 ( P C ,ρ C , T C ) 数据。混合物的测量临界性能数据用于研究强（等温压缩率K TX和等压热容C PX) 和弱（等容热容C VX）沿临界等容线和临界等温线的奇异性质。测量的P ρ T数据也用于估计物理意义（理论上重要）参数的值，即特征降低温度
和密度差异的混合物。根据测量的临界特性数据，Krichevskii 参数K kr的值已被估计，它定义了结构 ( N exc ) 和热力学 () 接近纯溶剂（正己烷）临界点的稀混合物的性质。
京公网安备 11010802027423号