Critical-Point Temperature of Ionic Liquids from Surface Tension at Liquid−Vapor Equilibrium and the Correlation with the Interaction Energy

2010 ◽  
Vol 49 (24) ◽  
pp. 12696-12701 ◽  
Author(s):  
Mohammad Hadi Ghatee ◽  
Fatemeh Moosavi ◽  
Amin Reza Zolghadr ◽  
Razyeh Jahromi
Keyword(s):  
Surface Tension ◽  
Ionic Liquids ◽  
Critical Point ◽  
Interaction Energy ◽  
Point Temperature ◽  
Vapor Equilibrium ◽  
Liquid Vapor

Surface tension measurements of imidazolium-based ionic liquids at liquid–vapor equilibrium

2008 ◽  
Vol 263 (2) ◽  
pp. 168-175 ◽  
Author(s):  
Mohammad Hadi Ghatee ◽  
Amin Reza Zolghadr
Keyword(s):  
Surface Tension ◽  
Ionic Liquids ◽  
Vapor Equilibrium ◽  
Liquid Vapor

Liquid-vapor equilibrium and surface tension of nonconformal molecular fluids

2005 ◽  
Vol 122 (3) ◽  
pp. 034504 ◽  
Author(s):  
Fernando del Rı́o ◽  
Enrique Dı́az-Herrera ◽  
Edgar Ávalos ◽  
José Alejandre
Keyword(s):  
Surface Tension ◽  
Molecular Fluids ◽  
Vapor Equilibrium ◽  
Liquid Vapor

Liquid-Vapor Equilibrium Models – Critical Point, Corresponding States, and Reduced Properties

2021 ◽  
pp. 177-219
Author(s):  
Florin Emilian Daneş ◽  
Silvia Daneş ◽  
Valeria Petrescu ◽  
Eleonora-Mihaela Ungureanu
Keyword(s):  
Critical Point ◽  
Corresponding States ◽  
Equilibrium Models ◽  
Vapor Equilibrium ◽  
Liquid Vapor

Surface tension of liquid N2 near the liquid-vapor critical point

1990 ◽  
Vol 165-166 ◽  
pp. 165-166
Author(s):  
Akiko Shimoyanagita ◽  
Nobutaka Itagaki ◽  
Akira Sato ◽  
Masaru Suzuki
Keyword(s):  
Surface Tension ◽  
Critical Point ◽  
Liquid Vapor

New generalized corresponding states correlation for surface tension of normal saturated liquids

2015 ◽  
Vol 29 (22) ◽  
pp. 1550156 ◽  
Author(s):  
Huili Yi ◽  
Jianxiang Tian
Keyword(s):  
Surface Tension ◽  
Critical Point ◽  
Triple Point ◽  
Temperature Dependent ◽  
Simple Correlation ◽  
Surface Tension Data ◽  
Point Temperature ◽  
New Correlation ◽  
Experimental Surface ◽  
Triple Point Temperature

A new simple correlation based on the principle of corresponding state is proposed to estimate the temperature-dependent surface tension of normal saturated liquids. The new correlation contains three coefficients obtained by fitting 17,051 surface tension data of 38 saturated normal liquids. These 38 liquids contain refrigerants, hydrocarbons and some other inorganic liquids. The new correlation requires only the triple point temperature, triple point surface tension and critical point temperature as input and is able to well represent the experimental surface tension data for each of the 38 saturated normal liquids from the triple temperature up to the point near the critical point. The new correlation gives absolute average deviations (AAD) values below 3% for all of these 38 liquids with the only exception being octane with AAD=4.30%. Thus, the new correlation gives better overall results in comparison with other correlations for these 38 normal saturated liquids.

The Critical Point Drying Method Applied to Scanning Electron Microscopy of L-929 Cells

1970 ◽  
Vol 28 ◽  
pp. 278-279
Author(s):  
Charles TurnbiLL ◽  
Delbert E. Philpott
Keyword(s):  
Electron Microscopy ◽  
Carbon Dioxide ◽  
Surface Tension ◽  
Critical Point ◽  
Freeze Drying ◽  
Attractive Alternative ◽  
Crystal Formation ◽  
Critical Point Drying ◽  
Time Required ◽  
Scanning Electron

The advent of the scanning electron microscope (SCEM) has renewed interest in preparing specimens by avoiding the forces of surface tension. The present method of freeze drying by Boyde and Barger (1969) and Small and Marszalek (1969) does prevent surface tension but ice crystal formation and time required for pumping out the specimen to dryness has discouraged us. We believe an attractive alternative to freeze drying is the critical point method originated by Anderson (1951; for electron microscopy. He avoided surface tension effects during drying by first exchanging the specimen water with alcohol, amy L acetate and then with carbon dioxide. He then selected a specific temperature (36.5°C) and pressure (72 Atm.) at which carbon dioxide would pass from the liquid to the gaseous phase without the effect of surface tension This combination of temperature and, pressure is known as the "critical point" of the Liquid.

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.

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