Adsorption of o-hydroxybenzoic acid on polymers in supercritical carbon dioxide medium: experimental and modeling

作者：Diankov S^*; Subra Paternault P; Hinkov I; Pentchev I

来源：Bulgarian Chemical Communications, 2012, 44(4): 399-406.

• supercritical carbon dioxide
• impregnation
• modeling

In this work we present an experimental set-up used for semi-continuous impregnation per adsorption process of polymers with an organic model component (o-hydroxybenzoic acid - o-HBA) using supercritical CO2 as solvent and impregnating medium. The aim is to study the effect of the supercritical solvent flow-rate, the pressure and the polymer support on the breakthrough volume and the adsorbed quantity. The regular sampling of the supercritical phase is analyzed by High Performance Liquid Chromatography. It is found that the uptake increases with the pressure and decreases with the supercritical solvent flow-rate. In addition, a ID model with local equilibrium is developed. The model fits well to the breakthrough curves. The numerically obtained values are in good agreement with the experimental results.

• 出版日期2012
• 单位北京化工大学