Prediction of critical temperature and critical pressure of multi-component mixtures

2017 ◽  
Vol 441 ◽  
pp. 2-8 ◽  
Author(s):  
Maogang He ◽  
Yang Liu ◽  
Xiangyang Liu
Keyword(s):  
Critical Temperature ◽  
Critical Pressure

Estimation of Critical Temperature and Critical Pressure Using Antoine Constants

2015 ◽  
Vol 48 (2) ◽  
pp. 104-106 ◽  
Author(s):  
Katsumi Tochigi ◽  
Satoru Ando ◽  
Kyohei Suginuma ◽  
Hiroyuki Matsuda ◽  
Kiyofumi Kurihara
Keyword(s):  
Critical Temperature ◽  
Critical Pressure

The Direct Determination of the Critical Temperature and Critical Pressure of Normal Hydrogen1

1950 ◽  
Vol 72 (8) ◽  
pp. 3565-3568 ◽  
Author(s):  
David White ◽  
Abraham Solomon Friedman ◽  
Herrick L. Johnston
Keyword(s):  
Critical Temperature ◽  
Critical Pressure ◽  
Direct Determination

Two Species/Nonideal Solution Model for Amorphous/Amorphous Phase Transitions

1996 ◽  
Vol 455 ◽  
Author(s):  
Cornelius T. Moynihan
Keyword(s):  
Phase Transition ◽  
Phase Transitions ◽  
Critical Temperature ◽  
Amorphous Phase ◽  
Thermodynamic Model ◽  
Critical Pressure ◽  
Solution Model ◽  
Amorphous Phases ◽  
First Order ◽  
Temperature And Pressure

ABSTRACTA simple macroscopic thermodynamic model for first order transitions between two amorphous phases in a one component liquid is reviewed, augmented and evaluated. The model presumes the existence in the liquid of two species, whose concentrations are temperature and pressure dependent and which form a solution with large, positive deviations from ideality. Application of the model to recent data indicates that water can undergo an amorphous/amorphous phase transition below a critical temperature Tc of 217K and above a critical pressure Pc of 380 atm.

scholarly journals A new formation of diamond

1905 ◽  
Vol 76 (512) ◽  
pp. 458-461 ◽  
Keyword(s):  
Critical Temperature ◽  
Melting Point ◽  
Critical Point ◽  
Boiling Point ◽  
Critical Pressure ◽  
Carbonic Acid ◽  
Melting Points ◽  
Boiling Points ◽  
James Dewar ◽  
New Formation

On the average the critical point of a substance is 1·5 times its absolute boiling-point. Therefore the critical point of carbon should be about 5800° Ab. But the absolute critical temperature divided by the critical pressure is for all the elements so far examined never less than 2·5; this being about the value Sir James Dewar finds for hydrogen. So that, accepting this, we get the maximum critical pressure as follows, viz., 2320 atmospheres:— 5800° Ab./CrP = 2·5, or CrP = 5800° Ab./2·5, or 2320 atmospheres. Carbon and arsenic are the only two elements that have melting-point above the boiling-point; and among compounds carbonic acid and fluoride of silicium are the only other bodies with similar properties. Now the melting-point of arsenic is about 1·2 times its absolute boiling-point. With carbonic acid and fluoride of silicium the melting-points are about 1·1 times their boiling-points. Applying these ratios to carbon we find that its melting-point would be about 4400°.

Subcritical and Supercritical Nanodroplet Evaporation: A Molecular Dynamics Investigation

2007 ◽  
Author(s):  
S. Mikkilineni ◽  
E. S. Landry ◽  
A. J. H. McGaughey
Keyword(s):  
Molecular Dynamics ◽  
Critical Temperature ◽  
Critical Pressure ◽  
Ambient Pressure ◽  
Transition Line ◽  
Ambient Temperatures ◽  
Lennard Jones ◽  
Temperature And Pressure ◽  
A New Technique ◽  
Dynamics Simulations

Molecular dynamics simulations are used to investigate the subcritical and supercritical evaporation of a Lennard-Jones (LJ) argon nanodroplet in its own vapor. Using a new technique to control both the ambient temperature and pressure, a range of conditions are considered to define a transition line between subcritical and supercritical evaporation. The evaporation is considered to be supercritical if the surface temperature of the droplet reaches the LJ argon critical temperature during its lifetime. Between ambient temperatures of 300 K and 800 K, the transition from subcritical to supercritical evaporation is observed to occur at an ambient pressure 1.4 times greater than the LJ argon critical pressure. For subcritical conditions, the droplet lifetimes obtained from the simulations are compared to independently predicted lifetimes from the D2 law.

PERSISTENCE OF THE LIQUID STATE OF AGGREGATION ABOVE THE CRITICAL TEMPERATURE

1938 ◽  
Vol 16b (9) ◽  
pp. 289-302 ◽  
Author(s):  
R. L. McIntosh ◽  
O. Maass
Keyword(s):  
Critical Temperature ◽  
Statistical Mechanics ◽  
Liquid State ◽  
Critical Pressure ◽  
Critical Density ◽  
Small Correction ◽  
Pressure Region ◽  
The Difference ◽  
Liquid States ◽  
Made In

The data obtained by Maass and Geddes (7) on the properties of ethylene in the critical-temperature–critical-pressure region have been substantiated although it was shown that a small correction had to be applied to their absolute values of density. It was shown that at the critical density of ethylene the difference between the densities of the medium below and above the point at which the meniscus disappeared was a maximum. The conclusion of Mayer and Harrison (made in their recent papers on statistical mechanics of condensing systems (6, 10)) that, at a temperature just above that at which the meniscus disappeared, the pressure of the system remains constant over a considerable variation of mass per volume, has been corroborated. The effect of the presence of small measured quantities of air has been examined. The phenomena observed are explained on the basis that there is a difference between the gaseous and liquid states of aggregation with a structure assigned to the latter.

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