Study on Phase Equilibrium for Binary System of Gas Components, Methanol and Water in Three-Phase Methanol Synthesis Process with Liquid Paraffin

Solubilities of gas components H2, CO, CO2 and CH3OH, H2O in liquid paraffin for three-phase methanol synthesis process were measured at the temperatures ranging from 453K to 533K and at pressures ranging from 0.05MPa to 5.0MPa by means of indirect gas physical absorption technique and static total vapor pressure method. The experimental results showed: solubilities of H2 and CO increased but solubilities of other components decreased with temperature increase. Under these experimental conditions, solubilities of H2, CO, CO2 approximately followed Henry's law, and active coefficient of methanol in liquid paraffin reduced with increasing of temperature. The calculated values from the correlation equations of solubilities of various components to its equilibrium pressure and temperature obtained through regressing the experimental data agreeed well with the experimental data.