Modifying Peng-Robinson Equation of State To Consider Influence of Confinement on Fluid Phase Behavior

2019 ◽  
Author(s):  
Yilei Song ◽  
Zhaojie Song ◽  
Jirui Hou ◽  
Zhixing Wang
Keyword(s):  
Equation Of State ◽  
Phase Behavior ◽  
Fluid Phase ◽  
Robinson Equation

scholarly journals Revisiting Kelvin equation and Peng–Robinson equation of state for accurate modeling of hydrocarbon phase behavior in nano capillaries

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ilyas Al-Kindi ◽  
Tayfun Babadagli
Keyword(s):  
Experimental Data ◽  
Surface Tension ◽  
Equation Of State ◽  
Phase Behavior ◽  
Pore Radius ◽  
Microfluidic Chips ◽  
Tight Sandstone ◽  
Kelvin Equation ◽  
Rock Samples ◽  
Robinson Equation

AbstractThe thermodynamics of fluids in confined (capillary) media is different from the bulk conditions due to the effects of the surface tension, wettability, and pore radius as described by the classical Kelvin equation. This study provides experimental data showing the deviation of propane vapour pressures in capillary media from the bulk conditions. Comparisons were also made with the vapour pressures calculated by the Peng–Robinson equation-of-state (PR-EOS). While the propane vapour pressures measured using synthetic capillary medium models (Hele–Shaw cells and microfluidic chips) were comparable with those measured at bulk conditions, the measured vapour pressures in the rock samples (sandstone, limestone, tight sandstone, and shale) were 15% (on average) less than those modelled by PR-EOS.

A novel pore-size-dependent equation of state for modeling fluid phase behavior in nanopores

2019 ◽  
Vol 498 ◽  
pp. 72-85 ◽  
Author(s):  
Sheng Luo ◽  
Bikai Jin ◽  
Jodie L. Lutkenhaus ◽  
Hadi Nasrabadi
Keyword(s):  
Equation Of State ◽  
Phase Behavior ◽  
Pore Size ◽  
Fluid Phase ◽  
Size Dependent
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