The non-random two-liquid model[1] (abbreviated NRTL model) is an activity coefficient model introduced by Renon and Prausnitz in 1968 that correlates the activity coefficients of a compound with its mole fractions in the liquid phase concerned. It is frequently applied in the field of chemical engineering to calculate phase equilibria.

2006年1月1日 · In this study, the generalized NRTL model is combined with the Peng-Robinson equation of state in order to predict the liquid-liquid equilibrium of binary systems containing hydrocarbons, water...

commonly used is the NRTL, which can be applied to polar mixtures. Other models include: Wilson, Van Laar, UNIFAC, UNIQUAC, Flory Huggins, Electrolyte NRTL, and Scatchard Hildebrand models. In these models, the activity coefficient approach is used to calculate the liquid properties, while

2021年11月18日 · The research objective is to determine which ACM among the Wilson, universal quasi-chemical (UNIQUAC), and nonrandom two-liquid (NRTL) models is the most suitable to extend the tc-PR EoS to mixtures using EoS/a res E,γ MRs. For this purpose, it is decided to use the high-quality reference database developed by the authors.

2014年3月15日 · In this work Vidal equation of state formulation (EOS-q E) was evaluated for vapor/liquid equilibria (VLE) isothermal calculations of binary and ternary mixtures, using NRTL model with 2 and 3 parameters for q E representation in the low to high pressure range, resulting at least as convenient and accurate in application as the gamma/phi ...

2023年6月27日 · A new activity coeff. method for assocg. systems, NRTL Plus Assocn. (NRTL-PA), is developed and evaluated for alc. + hydrocarbon systems. The method combines Wertheim's perturbation theory using the PC-SAFT form of the assocn. strength with Flory's theory and a residual contribution represented with NRTL.

2016年11月15日 · The new EoS, named NRTL-PRA (NRTL-PR with Association) includes an additional term in the EoS excess Gibbs energy of the Peng-Robinson equation to account for the self-association of methanol; the generalized NRTL model being especially adapted to the prediction of liquid phase equilibria (as indicated by its name « Non Random Two Liquids ...

2010年7月19日 · The purpose of this study is to propose a simple cubic equation of state for the prediction of phase equilibria in highly non ideal systems. The NRTL-PR equation of state is based on the association of the Peng−Robinson EoS and the generalized NRTL model developed in the first part of this work.

NRTL-PR状态方程式是基于Peng-Robinson EoS和在本工作的第一部分中开发的广义NRTL模型的关联。 该模型是从晶格双流体理论派生而来的，专门考虑混合物成分之间在尺寸和形状上的差异而开发。

2014年3月15日 · In this work Vidal equation of state formulation (EOS-qE) was evaluated for vapor/liquid equilibria (VLE) isothermal calculations of binary and ternary mixtures, using NRTL model with 2 and 3 parameters for qE representation in the low to high pressure range, resulting at least as convenient and accurate in application as the gamma/phi formulati...