Levulinic Acid Solubility in Supercritical Carbon Dioxide with and without Ethanol as Cosolvent at Different Temperatures

被引：24

作者：

Fan, Jinlong ^{[1
]}

Hou, Yucui ^{[2
]}

Wu, Weize ^{[1
]}

Zhang, Jianwei ^{[1
]}

Ren, Shuhang ^{[1
]}

Chen, Xiaoting ^{[1
]}

机构：

[1] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China

[2] Taiyuan Normal Univ, Dept Chem, Taiyuan 030012, Taiwan

来源：

JOURNAL OF CHEMICAL AND ENGINEERING DATA | 2010年 / 55卷 / 06期

基金：

北京市自然科学基金;

关键词：

GAMMA-VALEROLACTONE; BENZOIC-ACID; CO2; CONVERSION; LIQUIDS; DENSITY; SOLIDS;

D O I：

10.1021/je900727r

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The solubility of levulinic acid in supercritical carbon dioxide in the absence and presence of ethanol (mole fraction of ethanol x(3) = 0.0, 0.027, and 0.051) as a cosolvent was measured with a synthetic method at temperatures from (313.0 to 342.4) K and pressures from (8.0 to 19.0) MPa. It is demonstrated that, at a fixed temperature, the solubility of levulinic acid increases with increasing pressure; at a fixed pressure, it decreases with increasing temperature. When ethanol is added into supercritical carbon dioxide as a cosolvent, the solubility of levulinic acid increases greatly, and it increases with the concentration of the added ethanol. The experimental solubility data can be correlated using the Chrastil model and a modified Chrastil model with four adjustable parameters.

引用

页码：2316 / 2321

页数：6

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