Experimental measurements and predictions of density, viscosity, and carbon dioxide solubility in methanol, ethanol, and 1-propanol

The solubilities of carbon dioxide in different alcohols, methanol, ethanol, and 1-propanol, were measured at two different temperatures (303.2 and 323.2) K and pressures up to 6 MPa. The experimental data of saturated alcohol density and viscosity were also reported at each temperature and pressure. The solubility data shows that the solubility of carbon dioxide in alcohol increases with pressure and decreases with temperatures in the studied pressure and temperature ranges. The higher dissolution of carbon dioxide in alcohols resulted in increase in the saturated liquid densities and decrease in saturated liquid viscosities. The experimental solubility as well as saturated liquid density data were predicted with two cubic equations of state (EOS), Peng–Robinson (PR) and Soave–Redlich–Kwong (SRK). The modeling results demonstrated that both equations of state correlated the solubility data well over the studied pressure and temperature ranges. However, the saturated liquid densities calculated with the SRK EOS were much better than those of PR EOS.

► Solubility of carbon dioxide in methanol, ethanol, and 1-propanol and saturated liquid properties.
► Experimental measurements at (303.2 and 323.2) K over pressure range (1 to 6) MPa.
► The results show that the solubility of carbon dioxide decreased from methanol to 1-propanol.
► The experimental data were modeled using the Peng–Robinson and Soave–Redlich–Kwong equations of state.