Experimental measurement and correlation of solubility of β-carotene in pure and ethanol-modified subcritical water  

作　　者：Hadi Share Mohammadi Ali Haghighi As Maryam Khajenoori 

机构地区：[1]Faculty of Chemical,Petroleum and Gas Engineering,Semnan University,Semnan 35131-19111,Iran

出　　处：《Chinese Journal of Chemical Engineering》2020年第10期2620-2625,共6页中国化学工程学报（英文版）

基　　金：The authors tend to appreciate for the partial financial support from Semnan University Science and Technology Park.

摘　　要：For the first time,the solubility ofβ-carotene in pure and ethanol-modified subcritical water(SW)using the static method was determined.The experimental runs were performed at a temperature ranging from 298.15 to 403.15 K and 0–10%(w/w)of ethanol as a modifier at a constant pressure of 5 MPa.Samples were analyzed by UV–vis spectrophotometer.The solubility ofβ-carotene was found to range from 1.084×10^-8 to 227.1×10^-8 mol fractions in the subcritical water in above mentioned conditions.The obtainedβ-carotene solubility data were correlated using the linear model and modified Apelblat model.The obtained results showed the modified Apelblat model was better for estimating the solubility ofβ-carotene in SW.The values of the rootmean-square deviation(RMSD)between experimental and correlated data were calculated and used as the index of validity and accuracy for the model.Also,thermodynamic properties of the solution such as the Gibbs free energy of solution,enthalpy,and entropy of solution were estimated.

关 键 词：Subcritical water Β-CAROTENE SOLUBILITY Semi-empirical model 

分 类 号：O645.12[理学—物理化学] O629.4[理学—化学]