Correlating and estimating the solubilities of solid organic compounds in supercritical CO 2 based on the modified expanded liquid model and the group contribution method

•Accurate solubility parameters of sc-CO2 are necessary in solution models.•The variables in the solution models are nearly temperature-independent.•A modified solution model was proposed based on the linear fit of δ2 and δ1/v1.•Group contribution method was developed to estimate the fitting parameters.•The solubilities can be estimated in the order of magnitude for most compounds.