Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

ABSTRACT

Although a lot of investigations have been performed on solvents regarding the absorption of CO2 in the past decades, not much is known about absorption in mixtures of solvents. It is supposed that additives like acetone lead to higher CO2 solubilities in methanol compared to absorption in pure methanol. Moreover, there is very little information on the absorption of CO2 in methanol with contents of water, which is present in many absorption processes. In this work, a new apparatus is introduced for the investigation of gas solubilities in physical solvents like alcohols, ketones or other solvents in a temperature range of T= 253.15 K to T = 453.15 K. Two different measurement methods are shown and the results are published as (p, x) data and diagrams. The obtained data increase the knowledge of solubilities of CO2 in mixtures of methanol and water at certain water contents as well as in acetone at temperatures of T much less than 298.15 K, which have not been examined in modern, accessible literature before. The absorption of CO2 in mixtures of acetone and methanol is published for the first time.