Phase equilibrium investigations of fluid systems at high pressures

1993 ◽  
Vol 65 (2) ◽  
pp. 173-182 ◽  
Author(s):  
G. M. Schneider
Keyword(s):  
Phase Equilibrium ◽  
High Pressures ◽  
Fluid Systems

Phase equilibrium data and thermodynamic modeling of the system propane+NMP+methanol at high pressures

2010 ◽  
Vol 55 (1) ◽  
pp. 23-31 ◽  
Author(s):  
Rafael M. Charin ◽  
Marcos L. Corazza ◽  
Papa M. Ndiaye ◽  
Marcio A. Mazutti ◽  
J. Vladimir Oliveira
Keyword(s):  
Phase Equilibrium ◽  
Thermodynamic Modeling ◽  
High Pressures ◽  
Phase Equilibrium Data ◽  
Equilibrium Data

Thermodynamic, spectroscopic and phase equilibrium investigations on polar fluid mixtures at high pressures

1987 ◽  
Vol 59 (9) ◽  
pp. 1115-1126 ◽  
Author(s):  
G. M. Schneider ◽  
Jürgen Ellert ◽  
Udo Haarhaus ◽  
I. F. Holscher ◽  
Gudrun Katzenski-Ohling ◽  
...  
Keyword(s):  
Phase Equilibrium ◽  
High Pressures ◽  
Polar Fluid ◽  
Fluid Mixtures

scholarly journals Synthesis and Hydrothermal Study of (Na,K)M2(PO4)3 (M = Ti, Zr, Hf) Solid Solutions

2010 ◽  
Vol 12 (3,4) ◽  
pp. 195
Author(s):  
E.A. Asabina ◽  
V.I. Pet'kov ◽  
A.M. Kovalsky ◽  
A.R. Kotelnikov
Keyword(s):  
Solid Solutions ◽  
High Pressures ◽  
Sol Gel ◽  
Distribution Coefficients ◽  
Exchange Reactions ◽  
Sodium Potassium ◽  
Cell Parameters ◽  
Fluid Systems ◽  
Concentration Dependences ◽  
Comparison Of The Results

(Na,K)M2(PO4)3 (M = Ti, Zr, Hf) continuous solid solutions were synthesized by sol-gel and solidstate methods. Cation-exchange reactions in the NaM2(PO4)3–KM2(PO4)3–NaCl–KCl–H2O systems were<br />studied at T = 723 – 973 K and p = 100 – 200 MPa. The concentration dependences of unit cell parameters of the studied phosphates were found. The sodium/potassium distribution coefficients in the phosphate-fluid systems were functions of the solid solution compositions, that is, the systems behave nonideally. The excess volumes and excess Gibbs functions of solid solutions mixing were fitted to thirdorder polynomials and described in terms of the Margules model. From the comparison of the results obtained Ti-, Zr-, and Hf-systems, we made the conclusion that the titanium phosphates show greater<br />nonideality than zirconium and hafnium phosphates and lower thermodynamic stability to decomposition to double phosphates at high pressures and temperatures.

Predicting and Calculating Complex Phase Equilibrium in Supercritical Fluid Systems with a New Technique

1995 ◽  
Vol 60 (2) ◽  
pp. 188-210 ◽  
Author(s):  
Roumiana P. Stateva
Keyword(s):  
Phase Equilibrium ◽  
Equation Of State ◽  
Supercritical Fluid ◽  
New Technique ◽  
Complex Phase ◽  
Cubic Equation ◽  
Fluid Systems ◽  
Liquid Systems ◽  
A New Technique ◽  
Equilibrium Calculations

A general approach to multiphase equilibrium calculations with particular application to vapour-liquid-liquid and liquid-liquid-liquid systems is presented. The capabilities of the new technique to correctly predict and calculate complex phase equilibrium are tested on five highly non-ideal systems, relevant to supercritical fluid extraction. The thermodynamic models applied are the recently proposed MHV2 model and the Redlich-Kwong-Soave cubic equation of state.

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