Liquid-vapor equilibrium in the system helium-methane

AIChE Journal ◽  
1967 ◽  
Vol 13 (3) ◽  
pp. 593-599 ◽  
Author(s):  
C. K. Heck ◽  
M. J. Hiza
Keyword(s):  
Vapor Equilibrium ◽  
Liquid Vapor

EQUATIONS OF STATE FOR FLUIDS: THE LIQUID-VAPOR EQUILIBRIUM (LVE)

2008 ◽  
Vol 22 (30) ◽  
pp. 5335-5347 ◽  
Author(s):  
JIANXIANG TIAN ◽  
YUANXING GUI
Keyword(s):  
Experimental Data ◽  
Equations Of State ◽  
Packing Fraction ◽  
Optimal Choice ◽  
Critical Conditions ◽  
Mechanics Model ◽  
Vapor Equilibrium ◽  
Pure Substances ◽  
Compressibility Factors ◽  
Liquid Vapor

Historically, the development of equations of state for fluids has almost invariably followed the lead of the van der Waals (vdW) equation which includes an attraction term and a repulsion term. In this paper, using a simple statistical mechanics model, we introduce a parameter σ as both the power and a coefficient of the packing fraction y which locates at the numerator of the vdW attraction term. Then nine equations of state are constructed to solve the critical conditions and the main thermodynamic properties of pure substances at liquid-vapor equilibrium. As a result, the correct critical compressibility factors of Nitrogen, Argon, Carbon dioxide, Ethene, Methane, Oxygen, Propene, Water and Hydrogen, are obtained with an optimal choice of parameter σ. Good predictions of these equations to the liquid-vapor equilibrium properties below critical temperature are reported and compared with experimental data.

Density of Perfluorooctane on the Line of Liquid–Vapor Equilibrium

2021 ◽  
Vol 95 (4) ◽  
pp. 677-681
Author(s):  
R. A. Khairulin ◽  
S. V. Stankus
Keyword(s):  
Vapor Equilibrium ◽  
Liquid Vapor
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