Quintic equation of state for pure substances in sub- and supercritical range

2008 ◽  
Vol 263 (1) ◽  
pp. 18-25 ◽  
Author(s):  
Antoni Koziol
Keyword(s):  
Equation Of State ◽  
Quintic Equation ◽  
Pure Substances ◽  
Supercritical Range

Development of an Accurate Quintic Equation of State: The Necessity of the Irreducible Quadratic Polynomial in the Attractive Term

2015 ◽  
Vol 54 (9) ◽  
pp. 2580-2591
Author(s):  
Ju Ho Lee ◽  
Sang-Chae Jeon ◽  
Jae-Won Lee ◽  
Young-Hwan Kim ◽  
Guen-Il Park ◽  
...  
Keyword(s):  
Equation Of State ◽  
Quadratic Polynomial ◽  
Quintic Equation

Equation of state for square-well chain molecules with variable range. I: Application for pure substances

2009 ◽  
Vol 286 (1) ◽  
pp. 8-16 ◽  
Author(s):  
Jinlong Li ◽  
Haihua He ◽  
Changjun Peng ◽  
Honglai Liu ◽  
Ying Hu
Keyword(s):  
Equation Of State ◽  
Chain Molecules ◽  
Variable Range ◽  
Pure Substances ◽  
Square Well

A modification of the Redlich-Kwong-Soave equation of state and the determination of its parameters on the basis of saturated vapour pressures and second virial coefficients of pure substances

1989 ◽  
Vol 54 (6) ◽  
pp. 1446-1463 ◽  
Author(s):  
Petr Voňka ◽  
Pavel Dittrich ◽  
Josef P. Novák
Keyword(s):  
Equation Of State ◽  
Virial Coefficients ◽  
Effective Algorithm ◽  
Liquid Equilibrium ◽  
Second Virial Coefficients ◽  
Saturated Vapour ◽  
Pure Substances ◽  
Better Than ◽  
Wagner Equation

The temperature dependence of parameter a = a(Tr) of the Redlich-Kwong-Soave equation of state was modified. To calculate the corresponding individual parameters, an effective algorithm applying the Newton method was proposed. The parameters were determined for 60 substances, and the new modification correlates saturated vapour pressures from the values of pr = 0.001 to pr = 1.0 with the accuracy which is usually better than 0.2% and is comparable with that attained in terms of the Wagner equation. The modification proposed is utilized above all when applying the equation of state to the calculation of vapour-liquid equilibrium.

An Efficient Numerical Scheme to Solve a Quintic Equation of State for Supercritical Fluids

2014 ◽  
Vol 202 (3) ◽  
pp. 402-407 ◽  
Author(s):  
Hooman Fatoorehchi ◽  
Randolph Rach ◽  
Omid Tavakoli ◽  
Hossein Abolghasemi
Keyword(s):  
Equation Of State ◽  
Supercritical Fluids ◽  
Numerical Scheme ◽  
Quintic Equation

scholarly journals Equation of state to predict the solid-liquid-vapor phase coexistances of pure substances.

2020 ◽  
Vol 66 (5 Sept-Oct) ◽  
pp. 656
Author(s):  
J. M. Marín-García ◽  
A. Romero-Martínez ◽  
F. De J. Guevara-Rodríguez
Keyword(s):  
Equation Of State ◽  
Triple Point ◽  
Input Data ◽  
Acentric Factor ◽  
Point Temperature ◽  
Cubic Equation ◽  
Pure Substances ◽  
Solid Liquid ◽  
Triple Point Temperature ◽  
Liquid Vapor

A non-cubic equation of state is used to predict the solid-liquid, solid-vapor and liquid-vapor coexistences of pure substances. The equation of state is obtained using as input data the critical point, the boiling temperature, the triple point temperature and the acentric factor of the substance. In this work, some examples of phase diagrams predicted with the equation of state are reported in order to show its capabilities. Finally, a database with the parameters for different pure substances is presented.

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