Asymmetric composite PDMS membrane contactors for desorption of CO2 from monoethanolamine

Abstract

Membrane gas solvent contactors have the potential to revolutionize carbon capture, because the technology combines the advantages of both membrane and solvent technologies. Here, an asymmetric composite poly dimethylsiloxane (PDMS) on porous polysulfone membrane contactor was studied for the desorption of CO2 from loaded 30 wt% monoethanolamine (MEA) solution. Importantly, this study investigated the performance of the contactor at temperatures where the MEA solution entered the contactor as a liquid and as a vapor. It was found that the PDMS contactor CO2 flux was comparable to other reported membrane contactors when the MEA solution was in the solvent phase, but when the feed was vaporize..