Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Journal of Beijing University of Chemical Technology(Natural Science Edition)》 2013-01
Add to Favorite Get Latest Update

Comparison of Wilson,UNIQUAC and NRTL activity coefficient models for the phase equilibria of systems containing ionic liquids

WANG Hao LU Kang PENG Xuan(College of Information Science and Technology,Beijing University of Chemical Technology,Beijing 100029,China)  
Wilson,UNIQUAC and NRTL activity coefficient models of the phase equilibria of ionic liquid systems have been systematically compared.Binary systems composed of different ionic liquids and six types of solute—ketones,hydrocarbons,alcohols,esters,ethers and water—were investigated and regressed to obtain the interaction parameters for the three models.By choosing the acetone/methanol mixture,which gives a good fit in binary systems,we predicted the temperature dependence on composition for the acetone/methanol/1-ethyl-3-methyl imidazolium trifluoromethanesulfonate([triflate]) ternary system,and compared the results with the available experimental data.Our results show that the regression and prediction are all satisfactory for the NRTL model.However,since they depend on the specific system,the Wilson and UNIQUAC models are too unstable to give a good regression.Furthermore,both of them lack sufficient predictive capability in ternary systems.
【CateGory Index】: TQ013.1
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved