A study on solubility regulation of ethanol,n-propanol,i-propanol,n-butanol in supercritical carbon dioxide

Aim To determine solubilities of ethanol,n-propanol,i-propanol and n-butanol in supercritical carbon dioxide at 313K and 333K,and make the data fitted by empirical methods.Methods Experiment data were determined by constant-volume visual method.Results Solubility data were fitted by Chrastil semi-empirical equation and the characteristic model parameters of the model were obtained.Conclusion The solubilities of alcohols increased with temperature and the density of CO2,however,the solubilities would decrease with the increasement of carbon atom number in alcohol.Caculated effects coincided with experiment data.