Measurement and correlation of excess molar enthalpies of CO2+CH3OH systemin the vicinity of critical point of carbon dioxide

The excess molar enthalpies of the carbon dioxide + methanol system were me asured in the vicinity of the critical point of carbon dioxide using a flow -type isothermal microcalorimeter at temperatures 303.15 K and 308.15 K and pressures from 6.5 to 8.0 MPa. A strong dependence of H-E On pressure at t his area was observed. The correlation of the excess molar enthalpies was m ade using a composition-dependent equation composed of two polynomial expre ssions. It worked successfully for the H-E-x curves including the region wh ere there is a complicated change.