PVTx Properties of Liquefied Natural Gas Mixtures Using Tao-Mason Equation of State

2011 ◽  
Vol 44 (5) ◽  
pp. 295-303 ◽  
Author(s):  
Hajir Karimi ◽  
Fakhri Yousefi ◽  
Mohammad Mehdi Papari
Keyword(s):  
Equation Of State ◽  
Natural Gas ◽  
Gas Mixtures ◽  
Liquefied Natural Gas ◽  
Pvtx Properties

Prediction of Sound Speed in Natural-Gas Mixtures Using the CP-PC-SAFT Equation of State

2020 ◽  
Vol 54 (6) ◽  
pp. 1267-1275
Author(s):  
I. V. Prikhod’ko ◽  
A. A. Samarov ◽  
A. M. Toikka ◽  
M. Farzaneh-Gord
Keyword(s):  
Equation Of State ◽  
Natural Gas ◽  
Sound Speed ◽  
Gas Mixtures

Prediction of Liquefied Natural Gas Density Using Peng–Robinson Equation of State

2004 ◽  
Vol 22 (3-4) ◽  
pp. 415-422 ◽  
Author(s):  
Jabir Shanshool ◽  
Emad Talib Hashim ◽  
Abid Ali Hassaballah
Keyword(s):  
Equation Of State ◽  
Natural Gas ◽  
Liquefied Natural Gas ◽  
Gas Density ◽  
Robinson Equation

Calculation of critical points for natural gas mixtures with the GERG-2008 equation of state

2017 ◽  
Vol 437 ◽  
pp. 69-82 ◽  
Author(s):  
David Guerrero-Zárate ◽  
Alejandro Estrada-Baltazar ◽  
Gustavo A. Iglesias-Silva
Keyword(s):  
Equation Of State ◽  
Natural Gas ◽  
Critical Points ◽  
Gas Mixtures

scholarly journals COMPARATIVE STUDY OF EMPIRICAL CORRELATIONS AND EQUATIONS OF STATE EFFECTIVENESS FOR COMPRESSIBILITY FACTOR OF NATURAL GAS DETERMINATION

2021 ◽  
Vol 18 (38) ◽  
pp. 188-213
Author(s):  
Victor L. MALYSHEV ◽  
Yana F. NURGALIEVA ◽  
Elena F. MOISEEVA
Keyword(s):  
Equation Of State ◽  
Natural Gas ◽  
Equations Of State ◽  
Compressibility Factor ◽  
Gas Mixtures ◽  
Empirical Correlations ◽  
Shift Parameter ◽  
Reduced Pressure ◽  
Absolute Relative Error ◽  
Average Absolute Relative Error

Introduction: Today, there are four main groups of methods for calculating the compressibility factor of natural gas: experimental measurements, equations of state, empirical correlations, modern methods based on genetic algorithms, neural networks, atomistic modeling (Monte Carlo method and molecular dynamics). A correctly chosen method can improve the accuracy of calculating gas reserves and predicting its production and processing. Aim: To find the optimal methods for calculating the z-factor following the characteristic thermobaric conditions. Methods: To determine the best method for calculating the compressibility factor, the effectiveness of using various empirical correlations and equations of state to predict the compressibility factor of hydrocarbon systems (reservoir gases and separation gases) of various compositions were evaluated by comparing numerical results with experimental data. Results and Discussion: Based on 824 experimental values of the compressibility factor for 235 various gas mixtures in the pressure range from 0.1 to 94 MPa and temperatures from 273 to 437 K, the optimal equation of state and empirical correlation dependence for accurate z-factor prediction was found. It is shown that for all gas mixtures the Peng-Robinson equation of state with the shift parameter and Brusilovsky equation of state allow achieving best results. For these methods, the average absolute relative error does not exceed 2%. Among the correlation dependences, the best results are shown by the Sanjari and Nemati Lay; Heidaryan, Moghadasi and Rahimi correlations with an error not exceeding 3%. Conclusions: It was found that for the proposed methods, the reduced pressure has a more significant effect on the accuracy of the calculated values than the reduced temperature. It is shown that when studying acid gas mixtures with a carbon dioxide content of more than 10%, the equations of state better describe the phase behavior of the system in comparison with empirical correlations.

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