Effect of guest dependent reference hydrate vapor pressure on CH4, CO2, C2H6, N2 and C3H8 hydrate phase equilibria with various combinations of equations of state (PRSV, PT, SRK, PR and RK) and activity coefficient models (mUNIFAC, UNIQUAC, Wilson and NRTL)

2021 ◽  
pp. 113356
Author(s):  
Jugal N Anil ◽  
Dnyaneshwar R. Bhawangirkar ◽  
Jitendra S. Sangwai
Keyword(s):  
Vapor Pressure ◽  
Activity Coefficient ◽  
Phase Equilibria ◽  
Equations Of State ◽  
Hydrate Phase ◽  
Activity Coefficient Models

Dispersion activity coefficient models. Part 1: Cubic equations of state

2019 ◽  
Vol 501 ◽  
pp. 112275 ◽  
Author(s):  
Gerard J.P. Krooshof ◽  
Remco Tuinier ◽  
Gijsbertus de With
Keyword(s):  
Activity Coefficient ◽  
Equations Of State ◽  
Activity Coefficient Models

Dispersion activity coefficient models. Part 2: Perturbed chain equations of state

2019 ◽  
Vol 502 ◽  
pp. 112286
Author(s):  
Gerard J.P. Krooshof ◽  
Remco Tuinier ◽  
Gijsbertus de With
Keyword(s):  
Activity Coefficient ◽  
Equations Of State ◽  
Activity Coefficient Models

Equations of state and activity coefficient models for vapor-liquid equilibria of polymer solutions

AIChE Journal ◽  
1994 ◽  
Vol 40 (10) ◽  
pp. 1711-1727 ◽  
Author(s):  
Georgios M. Kontogeorgis ◽  
Aage Fredenslund ◽  
Ioannis G. Economou ◽  
Dimitrios P. Tassios
Keyword(s):  
Activity Coefficient ◽  
Polymer Solutions ◽  
Equations Of State ◽  
Vapor Liquid Equilibria ◽  
Activity Coefficient Models ◽  
Vapor Liquid

Phase Equilibria for Heterogeneous Azeotropic Distillation

2008 ◽  
Vol 3 (1) ◽  
Author(s):  
Enrique A. Campanella ◽  
Beatriz A. Mandagaran
Keyword(s):  
Phase Equilibrium ◽  
Activity Coefficient ◽  
Phase Equilibria ◽  
Conceptual Design ◽  
Azeotropic Distillation ◽  
Ternary Systems ◽  
Liquid Equilibrium ◽  
Equilibrium Modeling ◽  
Activity Coefficient Models ◽  
Vapor Liquid

This paper discusses the importance of phase equilibrium modeling in heterogeneous azeotropic distillation. Seven ternary systems are used to examine the behavior of phase equilibria and its representation, through activity coefficient models. This work used vapor-liquid equilibrium, liquid-liquid equilibrium, vapor-liquid-liquid equilibrium, azeotropic points and residue curve data to pick up a model and its parameters with the goal that the election correlate the systems in a way that it is useful for conceptual design of heterogeneous azeotropic distillation. The paper presents results done with UNIQUAC. A procedure to obtain binary parameters is proposed. The procedure is validated through an azeotropic distillation conceptual design and its following optimization using a rigorous simulation.

Properties of Refrigerants from Cubic Equations of State

2008 ◽  
Vol 59 (5) ◽  
Author(s):  
Viorel Feroiu ◽  
Dan Geana ◽  
Catinca Secuianu
Keyword(s):  
Experimental Data ◽  
Vapor Pressure ◽  
Equations Of State ◽  
Ternary Mixtures ◽  
Volumetric Properties ◽  
Mixing Rules ◽  
Saturation Curve ◽  
Equilibrium Thermodynamic ◽  
Liquid Equilibrium ◽  
Binary And Ternary Mixtures

Vapour � liquid equilibrium, thermodynamic and volumetric properties were predicted for three pure hydrofluorocarbons: difluoromethane (R32), pentafluoroethane (R125) and 1,1,1,2 � tetrafluoroethane (R134a) as well as for binary and ternary mixtures of these refrigerants. Three cubic equations of state GEOS3C, SRK (Soave � Redlich � Kwong) and PR (Peng � Robinson) were used. A wide comparison with literature experimental data was made. For the refrigerant mixtures, classical van der Waals mixing rules without interaction parameters were used. The GEOS3C equation, with three parameters estimated by matching several points on the saturation curve (vapor pressure and corresponding liquid volumes), compares favorably to other equations in literature, being simple enough for applications.

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