Measurement and modelling of isothermal solubility of methane in methanol from 213.15 K to 273.15 K

Measurements, reference values, and calculated results using SRK-vdW-Wilson-Henry for methane (1) + methanol (2) from 200.00 K to 273.15 K below 7.0 MPa: ●, this work; ■, Hong et al. [11]; lines (━ and ---), calculated results using SRK-vdW-Wilson-Henry. [Display omitted] •Solubility of methane in methanol was measured from 213.15 K to 273.15 K.•SRK-vdW-Wilson-Henry model provides satisfactory correlation with measurements.•Model parameters (λ12-λ11 and H1,2p0) at five temperatures were obtained.•Predicted results of model are optimal from 213.15 K to 273.15 K below 7.0 MPa. The isothermal solubility of methane in methanol was measured at temperatures from 213.15 K to 273.15 K and pressures from 1.0580 MPa to 6.9947 MPa. The static analytical method was used in the experiment, which was carried out by sampling from an equilibrium cell using a heated sample cylinder connected to a gas chromatograph and loading the sample into the chromatograph. The Soave–Redlich–Kwong equation of state with the van der Waals one-fluid mixing rule applying the Wilson activity coefficient model with Henry’s constant was used to describe the equilibrium behaviour of vapour and liquid phase in the system for (methane + methanol) binary mixture. The measurements were correlated with the SRK-vdW-Wilson-Henry model. The calculated results indicate that the model not only matches well with the measurements but also predicts optimally VLE data of the system from 213.15 K to 273.15 K below 7.0000 MPa.