Membranes for CO₂ /CH₄ and CO₂/N₂ Gas Separation

Abstract

Membrane technology has emerged as a leading tool worldwide for effective CO 2 separation because of its well-known advantages, including high surface area, compact design, ease of maintenance, environmentally friendly nature, and costeffectiveness. Polymeric and inorganic membranes are generally utilized for the separation of gas mixtures. The mixed-matrix membrane (MMM) utilizes the advantages of both polymeric and inorganic membranes to surpass the trade-off limits. The high permeability and selectivity of MMMs by incorporating different types of fillers exhibit the best performance for CO 2 separation from natural gas and other flue gases. The recent progress made in the field of MMMs having different types of fillers is emphasized. Specifically, CO 2 /CH 4 and CO 2 /N 2 separation from various types of MMMs are comprehensively reviewed that are closely relevant to natural gas purification and compositional flue gas treatment

PEEK–WC-Based Mixed Matrix Membranes Containing Polyimine Cages for Gas Separation

“…Gas separation by membranes is an application in continuous growth. Because of low operating costs compared to traditional techniques, it has spread its use in several processes, including biogas [ 1 ] and natural gas separation [ 2 ], H 2 recovery [ 3 ], post-combustion CO 2 capture, and oxygen enriched air production [ 4 , 5 ]. The development of new materials that can improve separation performances represents a continuous request for the research field.…”

Selection of a suitable ZIF-8/ionic liquid (IL) based composite for selective CO2 capture: the role of anions at the interface

“…2 Also, CO 2 freezing have an adverse effect in the cryogenic natural gas processing and the presence of CO 2 will reduce the caloric value of natural gas. 3 The currently available carbon capture materials lack its recyclability and cost-effectiveness also have large energy demand. 4 Thus, the design and development of new carbon capture materials are important in the socio-economic point of view.…”

Purification of Propylene and Ethylene by a Robust Metal–Organic Framework Mediated by Host–Guest Interactions

“…[ 31 , 32 , 33 ] MMMs can effectively improve the trade‐off between selectivity and permeability in pure polymer‐based membranes by incorporating porous fillers. [33] Although polymer‐based thin‐films and MMMs have been studied intensively for the separation of various gas mixtures, such as H 2 /CO 2 ,[ 34 , 35 , 36 ] CO 2 /N 2 , [37] CO 2 /CH 4 [ 38 , 39 , 40 ] and O 2 /N 2 , [41] polymer‐based membranes have shown limited separation factors or permeability[ 42 , 43 , 44 ] for the separation of C 3 H 6 /C 3 H 8 , and such studies based upon MOF‐incorporated MMMs have only been reported in limited cases, such as ZIF‐8, ZIF‐67 and SIFSIX[ 32 , 45 , 46 , 47 , 48 ] (Figure 4 , Table S10). We sought to fabricate MMMs based upon MFM‐520 and study their performance in the separation of C 3 H 6 /C 3 H 8 .…”