A New Simple Model to Calculate the Heat Capacity of Pure Ionic Liquids

In recent years, there is a great attention toward the ionic liquids due to their huge potential for separation and reaction technology. Also, the heat capacity of ionic liquids is a substantial parameter for conclusive process designs and engineering calculations. A database for the heat capacity of ionic liquids created by compiling experimental data in the literature covering a period from 1971 to 2016 is reported. In this work, a temperature-dependent equation to the heat capacity for 141 pure ionic liquids is proposed. A database containing 6961 experimental data was used to develop this model. Finally, a 7-parameter simple equation with the capability for predicting the heat capacity of ionic liquids is presented. The accuracy of the new model has been compared to the most precise models in the literature and the comparison indicates that the proposed method provides more accurate results than other models considered in this work. The average absolute percentage deviation from the new model is only 3.83%.