The effect of the end group, molecular weight and size on the solubility of compounds in supercritical carbon dioxide

被引：20
作者：
Chang, Fei [3 ]
Jin, Jing [1 ,2 ]
Zhang, Ning [1 ,2 ]
Wang, Gang [3 ]
Yang, Hai-Jian [1 ,2 ]
机构：
[1] S Cent Univ Nationalities, Coll Chem & Mat Sci, State Ethn Affairs Commiss, Key Lab Catalysis & Mat Sci, Wuhan 430074, Hubei Province, Peoples R China
[2] S Cent Univ Nationalities, Coll Chem & Mat Sci, State Ethn Affairs Commiss, Minist Educ,Key Lab Analyt Chem, Wuhan 430074, Hubei Province, Peoples R China
[3] Univ Shanghai Sci & Technol, Sch Environm & Architecture, Shanghai 200093, Peoples R China
来源：
FLUID PHASE EQUILIBRIA | 2012年 / 317卷
基金：
中国国家自然科学基金;
关键词：
End group; Molecular weight and size; Carbonyl; Solubility; Supercritical CO2; DIGLYCOLIC ACID-ESTERS; CO2; HYDROCARBONS; EXTRACTION; PRESSURES; POLYMERS; METALS;
D O I：
10.1016/j.fluid.2011.12.018
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
End groups of bis(2-hydroxyethyl)ether (compound 1) and tetraethylene glycol (compound 2) were modified with methyl malonyl chloride to produce two new compounds: malonic acid 2-[2-(2-methoxycarbonyl-acetoxy)-ethoxy]-ethyl ester methyl ester (compound 3) and Malonic acid 2-(2-{2-[2-(2-methoxycarbonyl-acetoxy)-ethoxy]-ethoxy}-ethoxy)-ethyl ester methyl ester (compound 4). And then the solubility of compounds 1-4 were investigated and compared in supercritical carbon dioxide (scCO(2)) at a temperature range of 313-363K and in the pressure range of 9.2-25.7 MPa. The effect of the end group, molecular weight and size for the solubility of the compounds were discussed. In addition, the tested solubility data were calculated and correlated with a semiempirical model at different pressures and temperatures, which showed satisfactory agreement with each other and the average absolute relative deviation was in the range of 2.61% and 33.25%. The Chrastil model also showed satisfactory agreement with each other and the average absolute relative deviation was in the range of 1.69% and 11.53%. (C) 2011 Elsevier B.V. All rights reserved.
引用
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页码：36 / 42
页数：7
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