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A new model for the surface tension of binary and ternary liquid mixtures based on Peng- Robinson equation of state 下载免费PDF全文
Based on the surface chemical potential and Peng-Robinson equation of state,a newmodel is proposed to predict and correlate the surface tensions of binary and ternary liquid mix-tures.Using this method,the surface tensions of 73 binary and 8 ternary systems are calculatedwith average relative deviations 1.35% and 3.52% respectively.The proposed model is simple, re-liable and accurate. 相似文献
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(2)从 Frank-Thompson 公式出发,在只存在一种电解质的情况下,赵慕愚认为对阴阳离子价态相等的电解质,其单个离子活度系数评算公式可表达如下: 相似文献
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本文用液上空间气相色谱法测定了由TBP-稀释剂、UO_2(NO_3)_2·2TBP-稀释剂(稀释剂为nC_8H_(14),nC_7H_(16),nC_8H_(18),C_6H_6,C_6H_(12),CCl_4,CHCl_3)所组成的20个二元体系和7个三元体系中组分活度系数,并由作者自行从分子径向分布函数与阻尼振荡相类比而推导得出的DORDF方程进行关联,从而回归得到9种化合物的分子作用参数。由这些二元体系获得的参数可用以推算相应的三元体系。文中还将DORDF方程与其它活度方程进行了比较。 相似文献
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本文研究了0.69,0.92及1.15M三辛胺-甲苯溶液从盐酸介质中对氯化铀酰的萃取。通过实验及热力学计算,求出参加萃取反应的各组分的浓度及活度系数,从而得出了三辛胺萃取盐酸和氯化铀酰的热力学平衡常数。其值分别为:K_4=1.46×10~3,K_5=(2.48-3.79)×10~5。 相似文献
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本文用气相色谱法测定了环丁砜萃取分离芳烃和非芳烃的三元、四元和五元共25个体系的液液平衡数据.用基团贡献模型UNIFAC预测了两相平衡浓度,结果令人满意. 相似文献
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The molecular dynamics(MD) was employed to simulate the diffusion coefficient of sodium chloride at infinite dilution in supercritical water from 703.2K to 763.2K and from 30 MPa to 45 MPa ,Based on the simulated data and the Patel-Teja(PT) equation of state and the Liu-Ruckenstein equation,an equation for calculating the diffusion coefficient of NaCl at infinite dilution in supercritical water is proposed,Both the agreement between the simulated and correlated data,and that between the simulated and predicted data of diffusion coefficients for NaCl in supercritical water ranging from 703.2K to 803.2K and from 25 MPa to 50MPa show that this equation is applicable for calculation of diffusion coefficients. 相似文献
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The density functional theory, simplified by the local density approximation and mean-field approximation, is applied to study the surface properties of pure non-polar fluids. A reasonable long rang correction is adopted to avoid the truncation of the potential. The perturbation theory is applied to establish the equation for the phase equilibrium, in which the hard-core chain fluid is as the reference fluid and the Yukawa potential is used as the perturbation term. Three parameters, elk, d and ms, are regressed from the vapor-liquid equilibria, and the surface properties, including density profile, surface tension and local surface tension profile are predicted with these parameters. 相似文献