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Thermodynamic Properties of Amines under High Temperature and Pressure: Experimental Results Correlating with a New Modified Tait-like Equation and PC-SAFT
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-11-29 , DOI: 10.1021/acs.iecr.8b04732
Rokhsareh Mohammadkhani 1 , Ameneh Paknejad 1 , Hosseinali Zarei 1
Affiliation  

New experimental densities for diethylamine (DEA), dibutylamine (DBA), and tributylamine (TBA) at 11 isotherms in the range of 293.15–473.15 K and 18 isobars up to 37.5 MPa are reported. PρT measurements (176 experimental data points) have been performed using a high-pressure vibrating-tube densimeter. These data were correlated with a new modified Tait-like equation considering standard deviations of less than 2 × 10–4 g·cm–3, and then isothermal compressibility (κT) and thermal expansion coefficient (αP) were calculated. This study is supported by the results of modeling using the perturbed-chain statistical associating fluid theory (PC-SAFT). The parameters of PC-SAFT equation of state (EoS), for pure solvents, were rigorously determined by fitting the equation to the liquid PρT experimental data. In this study, the correlations, which are based on minimizing the total objective functions (density, pressure, and temperature) simultaneously, were developed to estimate the PC-SAFT parameters. The model reasonably predicted the behavior of PρT and the first- and second-derivative properties such as isothermal compressibility (κT), thermal expansion coefficient (αP), isobaric heat capacities (CP), and speed of sound (u). The results undoubtedly suggest that the model performance is enhanced for either cases of the new modified Tamman–Tait equation and the PC-SAFT EoS, based on employing the proposed parameters.

中文翻译:

高温高压下胺的热力学性质:与新的改进的Tait-like方程和PC-SAFT相关的实验结果

据报道,在293.15–473.15 K范围内的11个等温线和18个最高37.5 MPa的等压线下,二乙胺(DEA),二丁胺(DBA)和三丁胺(TBA)的新实验密度得到了报告。P ρ Ť测量(176个实验数据点)已使用高压振动管密度计进行的。这些数据被用新的改性大吉状方程考虑小于2×10个标准偏差相关-4克·厘米-3,然后等温压缩(κ Ť)和热膨胀系数(α P)进行了计算。这项研究得到了使用扰动链统计缔合流体理论(PC-SAFT)的建模结果的支持。状态(EOS)的PC-SAFT方程的参数,对于纯溶剂,进行严格由方程式拟合所述液体确定P ρ Ť实验数据。在这项研究中,建立了基于最小化总目标函数(密度,压力和温度)的相关性,以估计PC-SAFT参数。该模型预测的合理的行为P ρ Ť和一阶和二阶导数性质,例如等温压缩(κ Ť),热膨胀系数(α P),等压热容(C P)和声速(u)。结果无疑表明,在采用建议参数的情况下,无论是新的改进的Tamman-Tait方程还是PC-SAFT EoS,模型的性能都得到了增强。
更新日期:2018-11-30
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