Abstract
Ionic liquids (IL), considered as green solvents, are useful in different industrial applications. Vapour pressure is one of the key properties of IL for designing different processes. Recently, the zero pressure fugacity approach was proposed to predict the vapour pressures of IL using cubic equations of state. In the present work, this approach was improved by fitting the vapour pressure data of ten ILs using six different cohesion factor models. New analytical expressions are proposed in the present work for predicting vapour pressure of IL using acentric factor and Mass Connectivity Index. It was shown that one of the proposed models (Model J) predicts vapour pressure with global %AAD of 7.3%. The model compared with the models based on COSMO-RS theory and PC SAFT-equation of state (EOS), and it was found that the proposed models work well compared to others. It is shown that the proposed models predict vapour pressure with greater accuracy and consistency.
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