Optimized Binary Interaction Parameters for VLE Calculations of Natural Gas Mixtures via Cubic and Molecular-Based Equations of State

2012 ◽  
Vol 51 (28) ◽  
pp. 9687-9699 ◽  
Author(s):  
Mert Atilhan ◽  
Santiago Aparicio ◽  
Kenneth R. Hall
Keyword(s):  
Natural Gas ◽  
Equations Of State ◽  
Gas Mixtures ◽  
Interaction Parameters ◽  
Binary Interaction ◽  
Binary Interaction Parameters

scholarly journals Equations of State with Group Contribution Binary Interaction Parameters for Calculation of Two-Phase Envelopes for Synthetic and Real Natural Gas Mixtures with Heavy Fractions

2018 ◽  
Vol 73 ◽  
pp. 7 ◽  
Author(s):  
Khashayar Nasrifar ◽  
Nejat Rahmanian
Keyword(s):  
Phase Equilibrium ◽  
Natural Gas ◽  
Equations Of State ◽  
Gas Mixtures ◽  
Interaction Parameters ◽  
Binary Interaction ◽  
Molecular Weights ◽  
Binary Interaction Parameters ◽  
Heavy Fractions ◽  
Equilibrium Calculations

Three equations of state with a group contribution model for binary interaction parameters were employed to calculate the vapor-liquid equilibria of synthetic and real natural gas mixtures with heavy fractions. In order to estimate the binary interaction parameters, critical temperatures, critical pressures and acentric factors of binary constituents of the mixture are required. The binary interaction parameter model also accounts for temperature. To perform phase equilibrium calculations, the heavy fractions were first discretized into 12 Single Carbon Numbers (SCN) using generalized molecular weights. Then, using the generalized molecular weights and specific gravities, the SCN were characterized. Afterwards, phase equilibrium calculations were performed employing a set of (nc + 1) equations where nc stands for the number of known components plus 12 SCN. The equations were solved iteratively using Newton's method. Predictions indicate that the use of binary interaction parameters for highly sour natural gas mixtures is quite important and must not be avoided. For sweet natural gas mixtures, the use of binary interaction parameters is less remarkable, however.

Predicting Binary-Interaction Parameters of Cubic Equations of State for Petroleum Fluids Containing Pseudo-components

2015 ◽  
Vol 54 (10) ◽  
pp. 2816-2824 ◽  
Author(s):  
Xiaochun Xu ◽  
Jean-Noël Jaubert ◽  
Romain Privat ◽  
Pierre Duchet-Suchaux ◽  
Francisco Braña-Mulero
Keyword(s):  
Equations Of State ◽  
Interaction Parameters ◽  
Binary Interaction ◽  
Binary Interaction Parameters
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