MH状态方程使用DDLC混合规则计算混合物临界轨迹

CIESC Journal

MH状态方程使用DDLC混合规则计算混合物临界轨迹

胡望明,侯虞钧,郭锡平

浙江大学化工系,浙江大学化工系,杭州家用电器公司杭州 ,杭州

出版日期:1991-08-25 发布日期:1991-08-25

Calculation of Critical Loci of Mixtures by MH Equation of State with DDLC Mixing Rule

Hu Wangming, Guo Xiping and Hou Yujun (Department of Chemical Engineering, Zhejiang University, Hangzhou)

Online:1991-08-25 Published:1991-08-25

摘要/Abstract

摘要： <正>一、引言状态方程能否精确地描述流体混合物热力学性质,建立合适的混合规则是一个重要因素.近十年来,许多研究者把局部组成概念引入立方型状态方程,建立了与密度有关的局部组成(DDLC)混合规则,将两类重要的热力学模型——状态方程和活度系数方程联系起来,大大地改善了状态方程应用于高密度区时的柔软性,改进了状态方程描述极性一非极性、含超临界组分等高度非对称体系的精确度.作者将局部组成概念引入多参数的MH状态方程,椎导了MH方程的DDLC混合规则,用于计算高压汽液平衡和二元混合物临界轨迹.本文将介绍后者的计算情况.

Abstract: The DDLC mixing rule has been developed for MH equation of state on the basis of two-fluid theory and the local mole fraction expression of a generalized NRTL model. It can be used to correlate the properties of most fluids under high pressure. The critical loci of 7 binary hydrocarbon mixtures and 17 typical binary systems, including polar-polar and nonpolar-polar system, are calculated by using the new mixing rule and the criteria for the critical point of a mixture suggested by Heidemann and Khalil. The accuracy is better than or comparable to commonly used cubic equation of state, and the improvement of evaluating Vc is most remarkable.

胡望明,侯虞钧,郭锡平. MH状态方程使用DDLC混合规则计算混合物临界轨迹 [J]. CIESC Journal.

Hu Wangming, Guo Xiping and Hou Yujun (Department of Chemical Engineering, Zhejiang University, Hangzhou). Calculation of Critical Loci of Mixtures by MH Equation of State with DDLC Mixing Rule[J]. .