DEVELOPMENT OF TIO2 MEMBRANES FOR GAS-PHASE NANOFILTRATION

Membranes have been fabricated from organic-based TiO2 sols via a coat ing process. This process produces an essentially flaw-free membrane. Gas permeability experiments employing these membranes indicate that t hese membranes possess unique properties. These membranes exhibit rela tively high permeabilities to propylene at low pressures. This propert y of these membranes can be attributed to a mechanism involving some f orm of condensed phase transport. The data also indicate that transpor t of helium, oxygen and nitrogen involves, to some extent, a form of s urface transport.