A Systematic and Consistent Approach To Determine Binary Interaction Coefficients for the Peng-Robinson Equation of State (includes associated papers 20308 and 20393 )

1989 ◽  
Vol 4 (04) ◽  
pp. 488-494 ◽  
Author(s):  
Carsten Slot-Petersen
Keyword(s):  
Equation Of State ◽  
Binary Interaction ◽  
Interaction Coefficients ◽  
Robinson Equation ◽  
Consistent Approach

Analysis of various approaches to accurately prediction of phase equilibrium of binary helium systems based on the Peng-Robinson equation of state

2020 ◽  
pp. 117-126
Author(s):  
V.L. Malyshev ◽  
◽  
E.F. Moiseeva ◽  
Keyword(s):  
Phase Equilibrium ◽  
Equation Of State ◽  
Phase Behavior ◽  
Binary Interaction ◽  
Binary Interaction Parameter ◽  
Multicomponent Systems ◽  
Interaction Coefficients ◽  
Acentric Factor ◽  
Robinson Equation

The paper presents a detailed algorithm for calculating the vapor-liquid phase equilibrium for multicomponent systems based on the Peng-Robinson equation of state. Various approaches are considered that make it possible to improve the quality of predicting phase equilibrium by the example of eight binary helium systems containing nitrogen, argon, carbon dioxide, methane, ethane, propane, isobutane, and n-butane. The influence of the acentric factor and the binary interaction parameter on the accuracy of the helium systems phase behavior predicting is analyzed. The optimal interaction coefficients for the presented systems are found under the assumption that this parameter does not depend on temperature. The temperature range of applicability of various approaches is determined, which makes it possible to maximize the description of the phase behavior of helium systems.

scholarly journals Application of Peng-Robinson Equation of State for Calculating Solid-Vapor and Solid-Liquid Equilibrium of CH4-CO2 System

2015 ◽  
Vol 9 (7) ◽  
pp. 177 ◽  
Author(s):  
Gede Wibawa ◽  
Muhammad F. A. Nafi ◽  
Asti Permatasari ◽  
Asalil Mustain
Keyword(s):  
Equation Of State ◽  
Binary Interaction ◽  
Binary Interaction Parameter ◽  
Average Absolute Deviation ◽  
Liquid Equilibrium ◽  
Absolute Deviation ◽  
Vapor Equilibrium ◽  
Solid Liquid ◽  
Parameter Values ◽  
Robinson Equation

In this study, the performances of Peng-Robinson Equation of State combined with the classical mixing ruleswere evaluated to calculate solid-vapor equilibrium (SVE) and solid-liquid equilibrium (SLE) of CH4-CO2system. The evaluation was performed by comparing the calculated values with the literature data. In thecalculation of SVE, the new binary interaction parameter values (kij) of CH4-CO2 mixtures were proposed in thiswork based on the experimental data. The proposed kij obtained in this work might increase the accuracy ofPeng-Robinson Equation of State by reducing average absolute deviation in the temperatures between calculatedvalues and literature data from (2.18% to 0.26%), (0.88% to 0.70%) and (0.61% to 0.44%) at CO2 compositionof 1%, 1.91% and 2.93%, respectively. Significant improvement was found at CO2 composition of 1%. In thecalculation of SLE, new parameters were not proposed since the calculation using the existing (literature) kijgives good results with an average absolute deviation of 0.5%.

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