TY - JOUR
T1 - Solubility of flavone, 6-methoxyflavone and anthracene in supercritical CO2 with/without a co-solvent of ethanol correlated by using a newly proposed entropy-based solubility parameter
AU - Ota, Masaki
AU - Hashimoto, Yoshiaki
AU - Sato, Megumi
AU - Sato, Yoshiyuki
AU - Smith, Richard Lee
AU - Inomata, Hiroshi
PY - 2016/10/15
Y1 - 2016/10/15
N2 - Solubility of flavone, 6-methoxyflavone and anthracene in supercritical CO2 with an ethanol co-solvent ranging from 0.05 to 0.40 were measured at 333 K and 22.0 MPa. Solubility of each compound increased with increasing mole fraction of ethanol. Solubility data were correlated with Chrastil equation considering a relationship between fluid density and solubility and compared with newly proposed relations that use an entropy-based solubility parameter (SSP). Among proposed relations, one relation taking temperature dependence into consideration, that included two fitting parameters had absolute relative deviation (ARD) of 3.9% compared to the experimental data and were much more reliable than a relation not taking temperature dependence into consideration within ARD of 7.6%. The expression similar to Chrastil model that included three fitting parameters and considered SSP was the best ARD within 3.6% among the proposed relations. From these correlation results, the SSP can be applied to determine the solubility of substances at high pressure with multicomponent solvent mixtures.
AB - Solubility of flavone, 6-methoxyflavone and anthracene in supercritical CO2 with an ethanol co-solvent ranging from 0.05 to 0.40 were measured at 333 K and 22.0 MPa. Solubility of each compound increased with increasing mole fraction of ethanol. Solubility data were correlated with Chrastil equation considering a relationship between fluid density and solubility and compared with newly proposed relations that use an entropy-based solubility parameter (SSP). Among proposed relations, one relation taking temperature dependence into consideration, that included two fitting parameters had absolute relative deviation (ARD) of 3.9% compared to the experimental data and were much more reliable than a relation not taking temperature dependence into consideration within ARD of 7.6%. The expression similar to Chrastil model that included three fitting parameters and considered SSP was the best ARD within 3.6% among the proposed relations. From these correlation results, the SSP can be applied to determine the solubility of substances at high pressure with multicomponent solvent mixtures.
KW - Model
KW - Prediction
KW - SSP
UR - http://www.scopus.com/inward/record.url?scp=84969232897&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84969232897&partnerID=8YFLogxK
U2 - 10.1016/j.fluid.2016.05.009
DO - 10.1016/j.fluid.2016.05.009
M3 - Article
AN - SCOPUS:84969232897
VL - 425
SP - 65
EP - 71
JO - Fluid Phase Equilibria
JF - Fluid Phase Equilibria
SN - 0378-3812
ER -