Membrane-Based Deoxygenation of an Alkanolamine Absorbent of CO₂: Formation of Composite Membranes and Influence of the Turbulators of the Liquid Phase in Them on Their Characteristics

The process of removal of the oxygen dissolved in a monoethanolamine-based absorbent from it in gas–liquid membrane contactors for the prevention of the oxidation destruction of this absorbent in the case of its use for the absorption removal of carbon dioxide from the combustion gases was investigated. The influence of the parameters of formation of composite membranes on the basis of porous tubular ceramic substrates with a thin selective nonporous polymer layer of a mixture of poly[1-(trimethylsilyl)-1-propyne] and poly(vinyl trimethylsilane) on their gas-transfer properties was determined. With the use of the membranes obtained, the process of removal of the oxygen dissolved in the aqueous solutions of monoethanolamine from them was realized. The possibility of intensification of this process with the use of a flow turbulator installed in the liquid part of a membrane contactor was demonstrated.