Selective adsorption of CO₂/CH₄ and CO₂/N₂ within a charged metal–organic framework

Abstract

A new ultramicroporous metal–organic framework with an anionic framework and counter cations accommodated in the large channels is reported for CO2 capture.

Effect of the structural constituents of metal organic frameworks on carbon dioxide capture

“…The authors claimed that the DMA + cations increased interactions with CO 2 gas molecules and pore blocking initiated by the DMA + cations limited the adsorbtion of large molecules like N 2 and CH 4 [202]. Another recent work by Cowan et al explored the presence of physically adsorbed functional groups within the pores, specifically of tetrafluoroborate counteranions placed inside the pores of the synthesized MOFs [203].…”

“…Kong et al used this approach to synthesize a new framework where protonated dimethylamine (DMA + ) cations were connected to the framework by hydrogen bonding [202]. The highest achievable CO 2 capture uptake was 2.57 mmol/g at 1 atm by this framework and CO 2 /N 2 selectivity was M A N U S C R I P T…”

Simple synthesis of porous melamine-formaldehyde resins by low temperature solvothermal method and its CO2 adsorption properties

“…To mitigate the effect of global warming, many porous materials, such as metal organic frameworks (MOFs) [5][6][7][8][9], porous co-ordination polymers [10,11], porous carbons [12][13][14][15][16], porous organic polymers (POPs) and covalent organic frameworks (COFs) [17][18][19][20], have been investigated for CO 2 storage. In recent years, many amine functionalized or nitrogen-rich porous materials were found to show good CO 2 adsorption properties because of the existence of strong interactions between the nitrogen functionality and CO 2 molecules [21][22][23][24][25][26][27].…”

Controlling the size and shape of Mg-MOF-74 crystals to optimise film synthesis on alumina substrates

“…The magnesium based Mg-MOF-74 has demonstrated the highest CO2 uptake at low to moderate pressures of any solid adsorbent 23 . Mg-MOF-74 powder has been used to remove CO2 selectively from flue gas (N2) streams 24,25 and separate CO2/CH4 mixtures [26][27][28] via adsorption. However, research into the fabrication of M-MOF-74 membranes is so far limited.…”