High‐Performance Membranes with Multi‐permselectivity for CO₂ Separation

Abstract

Multi-permselective membranes with diffusivity-selectivity, solubility-selectivity, and reactivity-selectivity for CO(2) separation are prepared by interfacial polymerization. The membranes are able to efficiently separate CO(2) from various light gases (H(2) , CH(4) and N(2) ) due to the optimized membrane structure and the comprehensive utilization of distinctions between CO(2) and light gases in size, condensability, and reactivity.

Ultraselective Gas Separation by Nanoporous Metal−Organic Frameworks Embedded in Gas‐Barrier Nanocellulose Films

“…In general, gas permeance decreases with increasing feed pressure at the membrane using the solution-diffusion transport. [ 26 ] These results show that the MOF−TOCN fi lm@paper can completely separate CO 2 and CH 4 based on their molecular sizes, and no gas diffusion into the TOCN matrix occurs. The ZIF-90 aperture (0.35 nm), which is expected to remain unchanged under the mild testing conditions, is larger than CO 2 (0.33 nm) and smaller than CH 4 (0.38 nm); in addition, the carbonyl groups of 2-imidazolecarbaldehyde in ZIF-90 would have a preferable affi nity Adv.…”

Relationship between polymer–filler interfaces in separation layers and gas transport properties of mixed matrix composite membranes

“…Since membrane permeance is inversely proportional to thickness, the resulting thinner composite material will have a higher permeance than the starting material [14]. Up to now, large efforts have been devoted to develop thin film composite membrane [15][16][17]. Combining with respective advantages of mixed matrix membrane and thin film composite membrane, mixed matrix composite membrane provides a realistic probability to improve performance of polymer membrane furthest.…”

Preparation and characterization of small molecular amine modified PVAm membranes for CO2/H2 separation

“…As more international attention is focused on the inadequacy of energy resources [1], the public concern about the CO 2 separation from syngas (mainly H 2 ) for clean energy supply has been increasing [2][3][4]. Membrane based CO 2 /H 2 separation process has been attracting more and more attention nowadays due to the wellknown advantages of low energy consumption, operational simplicity and low pollution over other gas separation techniques [5][6][7].…”