Correlation of Liquid Thermal Conductivity Using Molecular Connectivity Indices

Correlations for the thermal conductivity of liquids at 0.1 MPa and saturated liquids were proposed for hydrocarbons and non-hydrocarbon compounds separately in this work. The proposed correlations require only structural descriptors, that is, molecular connectivity indices and the number of heteroatoms, as input parameters. Since molecular connectivity indices can be calculated once the molecular structure of the substance concerned is known, the correlations based on them are predictive in nature. The new correlations were compared with existing correlations, and for the 65 hydrocarbons and the 192 non-hydrocarbon compounds adopted in this work, the average absolute deviations are 4.02 and 4.31%, respectively.