Unified Procedure for Solving Multiphase-Multicomponent Vapor-Liquid Equilibrium Calculation

1980 ◽  
Vol 19 (3) ◽  
pp. 482-489 ◽  
Author(s):  
Claudio Mauri
Keyword(s):  
Liquid Equilibrium ◽  
Equilibrium Calculation ◽  
Vapor Liquid Equilibrium ◽  
Vapor Liquid

scholarly journals VAPOR-LIQUID EQUILIBRIUM CALCULATION FOR SIMULATION OF BIOETHANOL CONCENTRATION FROM SUGARCANE

2018 ◽  
Vol 35 (2) ◽  
pp. 341-352 ◽  
Author(s):  
Karina Matugi ◽  
Osvaldo Chiavone-Filho ◽  
Marcelo Perencin de Arruda Ribeiro ◽  
Rafael de Pelegrini Soares ◽  
Roberto de Campos Giordano
Keyword(s):  
Liquid Equilibrium ◽  
Equilibrium Calculation ◽  
Vapor Liquid Equilibrium ◽  
Vapor Liquid

scholarly journals Study on Particle Swarm Optimization Variant and Simulated Annealing in Vapor Liquid Equilibrium Calculation

REAKTOR ◽  
2019 ◽  
Vol 19 (2) ◽  
pp. 77-83
Author(s):  
Rama Oktavian ◽  
Agung Ari Wibowo ◽  
Zuraidah Fitriah
Keyword(s):  
Particle Swarm Optimization ◽  
Simulated Annealing ◽  
Phase Equilibrium ◽  
Particle Swarm ◽  
Optimization Methods ◽  
Liquid Equilibrium ◽  
Equilibrium Calculation ◽  
Swarm Optimization ◽  
Vapor Liquid Equilibrium ◽  
Vapor Liquid

Phase equilibrium calculation plays a major rule in optimization of separation process in chemical processing. Phase equilibrium calculation is still very challenging due to highly nonlinear and non-convex of mathematical models. Recently, stochastic optimization method has been widely used to solve those problems. One of the promising stochastic methods is Particle Swarm Optimization (PSO) due to its simplicity and robustness. This study presents the capability of particle swarm optimization for correlating isothermal vapor liquid equilibrium data of water with methanol and ethanol system by optimizing Wilson, Non-Random Two Liquids (NRTL), and Universal Quasi Chemical (UNIQUAC) activity coefficient model and also presents the comparison with bare-bones PSO (BBPSO) and simulated annealing (SA). Those three optimization methods were successfully tested and validated to model vapor liquid equilibrium calculation and were successfully applied to correlate vapor liquid equilibrium data for those types of systems with deviation less than 2%. In addition, BBPSO shows a consistency result and faster convergence among those three optimization methods. Keywords: Phase equilibrium, stochastic method, particle swarm optimization, simulated annealing and activity coefficient model

Thermodynamic Property Calculation in Vapor-Liquid Equilibrium for Multicomponent Mixtures using Highly Accurate Helmholtz Free Energy Equation of State

2021 ◽  
pp. 108-121
Author(s):  
T. Luo ◽  
A.Yu. Chirkov
Keyword(s):  
Free Energy ◽  
Equation Of State ◽  
Thermodynamic Properties ◽  
Energy Equation ◽  
Helmholtz Free Energy ◽  
Multicomponent Mixtures ◽  
Liquid Equilibrium ◽  
Equilibrium Calculation ◽  
Vapor Liquid Equilibrium ◽  
Vapor Liquid

Thermodynamic properties of multicomponent mixtures in phase equilibrium were studied. The tangent plane criterion was used for stability analysis, and the Gibbs energy minimization was employed for phase equilibrium calculation when the successive substitution didn't converge. Thermodynamic properties of a 12-component natural gas mixture in vapor-liquid equilibrium were calculated with highly accurate Helmholtz free energy equation of state GERG--2008, simplified GERG--2008 and common cubic Peng --- Robinson (PR) equation of state. Results show that in vapor-liquid equilibrium, GERG--2008 has high accuracy and works better than simplified GERG--2008 and PR-equation of state. Simplified GERG--2008 and PR-equation of state both work unsatisfactorily in vapor-liquid equilibrium calculation, especially near the saturation zone. The deviation function in GERG--2008 can significantly affect the accuracy of GERG--2008 when calculating thermodynamic properties of mixtures in vapor-liquid equilibrium

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