Heteroatom-doped noble carbon-tailored mixed matrix membranes with ultrapermeability for efficient CO₂ separation

Abstract

Membranes with ultrapermeability for CO2 are desired for future large-scale carbon capture projects, because of their excellent separative productivity and economic efficiency. Heteroatom-doped noble carbons with surprisingly unique properties and...

Finely Tuning the Microporosity and Gas Permeation Properties in Superacid-Catalyzed Polymers of Intrinsic Microporosity

“…The membrane separation technique plays a significant role in gas separation due to its numerous advantages, including low energy consumption, small footprint, cost-effectiveness, and ease of operation. − It has found wide-ranging applications in concentrating O 2 and N 2 from air, − natural gas sweetening, − helium enrichment from natural gas, , and hydrogen recovery from purge gas. − The success of gas separation membranes heavily relies on the development of innovative membrane materials, making them a top priority in the field. Currently, most commercial gas separation membranes are made of polymers, primarily because of their good processability, excellent mechanical properties, and relatively low cost. , Nevertheless, polymeric membranes often face a noticeable trade-off between gas permeability and selectivity, originating from their inherently wide microcavity size distribution and low fractional free volume, as described by Robeson’s upper bounds. , Enhancing the microcavity size distribution and fractional free volume simultaneously improved the gas separation property.…”