(397d) High Energy Ion Beams-Induced Tailoring Ultramicropores in Carbon Molecular Sieve Membranes for Hydrogen Separation
AIChE Annual Meeting
2023
2023 AIChE Annual Meeting
Separations Division
Inorganic and CMS Membranes for Gas and Vapor Separation
Thursday, November 9, 2023 - 9:03am to 9:24am
The CHFMs were prepared from bio-renewable material of cellulose. By employing a dry-wet spinning method, cellulose hollow fiber membranes were fabricated and were further carbonized in a tubular furnace to obtain CHFMs. The fresh CHFMs were then treated with Ar plasma radiations in a plasma furnace with tunable treatment time and power (Figure 1a). It was found the H2/CO2 selectivity of the membranes sharply increased from 5.2 to 30.8, when the Ar-plasma was applied to the CHFMs, which cross the 2008 Robeson upper bound limit (Figure 1b). Further microstructure characterizations, such as XPS and Raman spectrum, suggested that the high-energy argon ion beams could modify the surface of the CMS via oxygen-functionalization and tune the ultramicropores, resulting in precisely tailor separation performances. This research provides a potential way to design the microstructure of CMS membranes for the precise separation of challenging gas pairs.