Application of the molecular interaction volume model (MIVM) and its modified form to organic vapor-liquid equilibria

MIVM-type models, including molecular interaction volume model and its modified form, are used to correlate VLE of binary systems and to predict activity coefficient of multicomponent systems in organic mixtures for the first time. Its feasibility and reliability are verified by calculation of 41 binary systems and 6 multicomponent systems, the types of which include polar/polar mixtures, polar/non polar mixtures and non polar/non polar mixtures. The results show that 1. MIVM and NRTL have almost equivalent effect in calculation of organic mixtures; 2. Modified MIVM has superiority in details processing capability and accurate description to special system's feature. Furthermore, necessary features of model when being applied in liquid alloys and in organic mixtures are discussed: liquid alloys with complicated deviation types are more focused on strong adaptability of model when fitting; while organic mixtures, whose deviation types are relatively unitary, more rely on details processing capability of model when fitting. Therefore, M-MIVM, owning these two extreme features simultaneously, may have big potential in effectively treating other different kinds of liquid mixtures except organic mixtures and liquid alloys. (C) 2018 Published by Elsevier B.V.