PDMS coating of used TFC-RO membranes for O2/N2 and CO2/N2 gas separation applications
Abstract(#br)A new application for used reverse osmosis (RO) membranes as gas separation membranes was studied. In this regard, firstly, three pretreatment procedures were used to remove the foulants from the surface of used membrane and then they were coated with polydimethylsiloxane (PDMS). The results indicated that PDMS-coated used RO membranes were capable of separating O 2 /N 2 and CO 2 /N 2 . The maximum O 2 /N 2 and CO 2 /N 2 selectivities of coated membranes were 5.9 and 32.5, respectively.