A thermodynamic approach to equations of state and melting at mantle and core pressures

1981 ◽  
pp. 264-271
Author(s):  
Frank D. Stacey
Keyword(s):  
Equations Of State ◽  
Thermodynamic Approach

scholarly journals A thermodynamic approach for correlating the solubility of drug compounds in supercritical CO2 based on Peng-Robinson and Soave-Redlich-Kwong equations of state coupled with van der Waals mixing rules

2019 ◽  
Vol 84 (10) ◽  
pp. 1169-1182
Author(s):  
Narjes Setoodeh ◽  
Parviz Darvishi ◽  
Abolhasan Ameri
Keyword(s):  
Supercritical Co2 ◽  
Equations Of State ◽  
Numerical Technique ◽  
Van Der Waals ◽  
Pharmaceutical Compounds ◽  
Thermodynamic Approach ◽  
Binary Interaction ◽  
Mixing Rules ◽  
Different Temperatures ◽  
Better Than

In the present study, the effect of equations of state and mixing rules in a thermodynamic approach has been investigated for the correlation of the solubility of four new solid pharmaceutical compounds, namely, benzamide, cetirizine, metaxalone and niflumic acid in supercritical CO2 at different temperatures and pressures. Two equations of state, the Peng?Robinson (PR) and Soave?Redlich?Kwong (SRK), coupled with mixing rules of one-parameter van der Waals (vdW1) and two-parameter van der Waals (vdW2) were used, where the binary interaction parameters for these sets of equations were evaluated. The approach correlations and the robustness of the numerical technique were validated with the experimental data previously reported for these compounds at different temperatures and pressures. The calculated average absolute relative deviations (AARD) were 7.51 and 5.31 % for PR/vdW1 and PR/ /vdW2 couples, and 11.05 and 10.24 % for SRK/vdW1 and SRK/vdW2 couples, respectively. It was also found that the PR equation of state results in modeling performance better than the SRK equation, and the vdW2 mixing rule better than the vdW1 one. These results obviously demonstrate that the combined approach used in this study is applicable for correlation of solid solubilities of some pharmaceutical compounds in supercritical CO2. Additionally, a semiempirical correlation is proposed for estimating the solubility of drug solids in supercritical CO2 as a function of pressure and temperature.

TPT2 and SAFTD equations of state for mixtures of hard chain copolymers

2000 ◽  
Vol 98 (24) ◽  
pp. 2045-2052
Author(s):  
Keshawa P. Shukla, Walter G. Chapman
Keyword(s):  
Equations Of State

Global thermodynamic approach of the molten core-concrete interaction (MCCI) and selected applications in the nuclear field

1997 ◽  
Vol 94 ◽  
pp. 849-860 ◽  
Author(s):  
PY Chevalier ◽  
E Fischer ◽  
B Cheynet ◽  
A Rivet ◽  
G Cenerino
Keyword(s):  
Thermodynamic Approach ◽  
Nuclear Field ◽  
Core Concrete

Computation of flows with arbitrary equations of state

AIAA Journal ◽  
1998 ◽  
Vol 36 ◽  
pp. 515-521 ◽  
Author(s):  
Charles L. Merkle ◽  
Philip E. O. Buelow ◽  
Sankaran Venkateswaran ◽  
Jennifer Y. Sullivan
Keyword(s):  
Equations Of State

A NEW KINETIC AND THERMODYNAMIC APPROACH TO PHENOL BIOSORPTION BY CHITOSAN AND KERATIN

2015 ◽  
Vol 14 (5) ◽  
pp. 1231-1240
Author(s):  
Mauri Sergio Alves Palma ◽  
Attilio Converti ◽  
Milena Nakagawa ◽  
Gisele Pigatto ◽  
Alessandra Lodi ◽  
...  
Keyword(s):  
Thermodynamic Approach

SITE-SPECIFIC EQUATIONS OF STATE FOR COASTAL SEA AREAS AND INLAND WATER BODIES

2017 ◽  
Author(s):  
Natalia Andrulionis ◽  
Natalia Andrulionis ◽  
Ivan Zavialov ◽  
Ivan Zavialov ◽  
Elena Kovaleva ◽  
...  
Keyword(s):  
Equation Of State ◽  
Black Sea ◽  
Water Samples ◽  
Equations Of State ◽  
Sea Water ◽  
Ionic Composition ◽  
Water Bodies ◽  
Aral Sea ◽  
The Black Sea ◽  
Coastal Sea

This article presents a new method of laboratory density determination and construction equations of state for marine waters with various ionic compositions and salinities was developed. The validation of the method was performed using the Ocean Standard Seawater and the UNESCO thermodynamic equation of state (EOS-80). Density measurements of water samples from the Aral Sea, the Black Sea and the Issyk-Kul Lake were performed using a high-precision laboratory density meter. The obtained results were compared with the density values calculated for the considered water samples by the EOS-80 equation. It was shown that difference in ionic composition between Standard Seawater and the considered water bodies results in significant inaccuracies in determination of water density using the EOS-80 equation. Basing on the laboratory measurements of density under various salinity and temperature values we constructed a new equation of state for the Aral Sea and the Black Sea water samples and estimated errors for their coefficients.

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