Measurement and Prediction of Infinite Dilution Activity Coefficients for Separation of Harmful Organic Compound in Waste Water

废水中有害有机物分离无限稀释活度系数的测量与预测

• 批准号: 10650763
• 负责人: HIAKI Toshihiko
• 金额: $ 0.19万
• 依托单位: Nihon University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10650763/
• 关键词: Infinite Dilution Activity Coefficients; Gas-Stripping Method; Measurement Apparatus; Group Contribution; Prediction Method; 推算法; 測定; 有機系有害物質

Measurement apparatus of infinite dilution activity coefficients based on a gas stripping chromatography method have developed. The measurement system consists of a Helium gas cylinder for stripping gas, an equilibrium cell made by Pyrex grass in a temperature controlled water bath, and gas chromatograph for determination of composition. The stripping gas flows through the flow controller into the solvent saturation cell. The cell was filled with solvent. The fritted glass tip in the cell has a pore diameter in the range of 4-8 μm, e.g. the G2 glass filter. The solution is stirred with a magnetic stirrer to help mixing and mass transfer.An effective test of equilibrium assumption is to change the flow rate of stripping gas and see whether we get a constant value of infinite dilution activity coefficient for a given system using the developed apparatus based on a gas stripping method. The infinite dilution activity coefficient of Hexane in Hexadecane of solvent was measured at 303.15 K. The literature value of this system is very accurately known. The experimental value of infinite dilution activity coefficient is 0.831 in this work. The data is good agreement with the literature value and well reproducibility.The prediction methods of infinite dilution activity coefficient base on the group contribution method, e.g. original UNIFAC, several kind of modified UNIFAC, and ASOG have proposed. A new approach is proposed by introducing mixture type groups to the modified universal functional activity coefficient model for prediction of infinite dilution activity coefficients in highly nonideal aqueous solution.

研制了基于气提色谱法的无限稀释活度系数测定装置。测量系统由用于汽提气体的氦气瓶、由Pyrex grass在温控水浴中制成的平衡池和用于测定组成的气相色谱仪组成。汽提气体流经流量控制器进入溶剂饱和池。该单元充满溶剂。池中的烧结玻璃尖端具有4-8 μm范围内的孔径，例如G2玻璃过滤器。用磁力搅拌器搅拌溶液以促进混合和传质，改变气提气体的流量，用基于气提法的装置，观察是否能得到一个给定体系的无限稀释活度系数的恒定值，是平衡假设的有效检验。测定了303.15K下正己烷在正十六烷溶剂中的无限稀释活度系数。该系统的文献价值是非常准确的。无限稀释活度系数的实验值为0.831。提出了基于基团贡献法的无限稀释活度系数的预测方法，如原活性炭法、几种改性活性炭法和ASOG法。通过在修正的泛函数活度系数模型中引入混合型基团，提出了一种预测高度非理想水溶液无限稀释活度系数的新方法。

项目成果

S.Zhang, T.Hiaki, K.Kojima: "Prediction of Infinite Dilution Activity Coefficients for systems including Water by Group Contribution"Fluid Phase Equilibria. 149. 27-40 (1998)

S.Zhang、T.Hiaki、K.Kojima：“通过群体贡献预测包括水在内的系统的无限稀释活度系数”流体相平衡。

S. Zhang, T. Hiaki, K. Kojima: "Prediction of Infinite Dilution Activity Coefficients for systems including Water by Group Contribution Method with Mixture-Type Groups"Fluid Phase Equilibria. 149. 27-40 (1998)

S.Zhang、T.Hiaki、K.Kojima：“通过混合型基团的基团贡献法预测包括水在内的系统的无限稀释活度系数”流体相平衡。

S.Zhang, T.Hiaki, K.Kojima: "Prediction of Infinite Dilution Activity Coefficents for systems including Watre by Group Contribution Method with Mixture-Type Groups"Fluid Phase Equilibria. 149. 27-40 (1998)

S.Zhang、T.Hiaki、K.Kojima：“通过混合型基团的基团贡献法预测包括水在内的系统的无限稀释活度系数”流体相平衡。