Thermodynamic modelling of liquid-liquid extraction of naphthenic acid from dodecane using imidazolium based phenolate ionic liquids

Syed Nasir Shah, Mohamed Ibrahim Abdul Mutalib, Mohamed Farid Ismail, Humbul Suleman, Kallidanthiyil Chellappan Lethesh

Research output: Contribution to journalArticle

Abstract

In this work, N-alkyl imidazolium based ionic liquids with phenolate anions have been used for the separation of naphthenic acid from model oil. The liquid-liquid equilibrium (LLE) data for the ternary mixture of [Cnmim][Phe], dodecane and naphthenic acid were experimentally obtained at a constant temperature of 303.15 K and atmospheric pressure. The effect of chain length on the extraction capability was observed by calculating the distribution coefficient. The experimental tie line data was correlated using the non-random two liquid model (NRTL) and Universal Quasi Chemical (UNIQUAC) model and new interaction parameters for the ternary systems are reported. The experimental data provides a good correlation with the modelling data and a very low root mean square deviation (RMSD) value was observed for all the systems.
Original languageEnglish
Pages (from-to)513-525
JournalJournal of Molecular Liquids
Volume219
Issue number1
DOIs
Publication statusPublished - 12 Apr 2016

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