Prediction the Solubility Data of Solid Solutes in Supercritical CO2 by Combined Mendez-Santiago-Teja and Peng Robinson Equations of State.

Abstract

The solubility data of twelve solid solutes extracted by supercritical CO2 (SCCO2) are predicted by combined Mendez-Santiago and Teja (Density base) equation of state, with Peng Robinson (PVT base) Equation of state depending on Microsoft® Excel 2010 software .Prediction of solubility data verse operation pressure by Mendez-Santiago and Teja equation of state (MST-EoS) depended on the compressibility factors that came from Peng-Robinson equation of state (PR-EoS) at isothermal condition. The combined model (MST with PR-EoS) gave accuracy better than 80% of the references data with enhancement ratio ranged from 9% to 1300%. All of these comparisons built on absolute average relative percent ratio values (AARDs %). The combined model compared with famous equations of state like (PR, MST, Modified MST, Chrastil and Modified PR EoSs) and passed to minimize the AARDs% values. Sometimes, the combined model resulted errors more than the references, but this were only when the extraction temperatures closed to the melting points of the solid solutes and approached to the liquid state.