Open AccessSolubility prediction of some disperse Azo dyes in supercritical carbon dioxide using equation of states (EOSs)
Author(s) -
Shahryar Jafari Nejad,
Milad Asgarpour Khansary,
Farshad Amiri
Publication year - 2012
Publication title -
international journal of thermodynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.243
H-Index - 32
ISSN - 2146-1511
DOI - 10.5541/ijot.361
Subject(s) - supercritical carbon dioxide , supercritical fluid , solubility , carbon dioxide , thermodynamics , materials science , chemical engineering , chemistry , organic chemistry , physics , engineering
<span style="line-height: 115%; font-family: "Times New Roman"; font-size: 10pt; mso-fareast-font-family: Calibri; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">The solubility of three disperse azo dyes, 4-(N,N-dimethylamino)-4’-itroazobenzene (D<sub>1</sub>), 4-(N,N-diethylamino)-4’-nitroazobenzene (D<sub>2</sub>) and Parared (D<sub>3</sub>) in supercritical carbon dioxide have been correlated with two equation of state. All critical properties have been estimated with a group contribution method (GCM). As far we know, solubility data for these dyes never has been correlated using an equation of state (EOS). Therefore, it is worthwhile to model the solubility of these disperse Azo dyes. In this work, the aim is correlating reported data with a new EOS and comparing obtained results with the results of Peng-Robinson EOS (PR-EOS) <span style="color: black;">together with two adjustable parameter van der Waals mixing and combining rules</span>.<span style="mso-spacerun: yes;"> </span>The calculated results showed that new EOS is more accurate than PR-EOS. It can be employed to speed up the process of SCF applications in industry.</span>
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