Solubility prediction of some disperse Azo dyes in supercritical carbon dioxide using equation of states (EOSs)

Authors : Shahryar JAFARİ NEJAD, Milad ASGARPOUR KHANSARY, Farshad AMİRİ

Pages : 103-110

View : 15 | Download : 4

Publication Date : 2012-05-17

Article Type : Research Paper

Abstract :The solubility of three disperse azo dyes, 4-insert ignore into journalissuearticles values(N,N-dimethylamino);-4’-itroazobenzene insert ignore into journalissuearticles values(D1);, 4-insert ignore into journalissuearticles values(N,N-diethylamino);-4’-nitroazobenzene insert ignore into journalissuearticles values(D2); and Parared insert ignore into journalissuearticles values(D3); in supercritical carbon dioxide have been correlated with two equation of state. All critical properties have been estimated with a group contribution method insert ignore into journalissuearticles values(GCM);. As far we know, solubility data for these dyes never has been correlated using an equation of state insert ignore into journalissuearticles values(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 insert ignore into journalissuearticles values(PR-EOS); together with two adjustable parameter van der Waals mixing and combining rules.  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.
Keywords : Solubility, disperse azo dyes, supercritical carbon dioxide, correlation, equation of state EOS,