A review on anion-pillared metal–organic frameworks (APMOFs) and their composites with the balance of adsorption capacity and separation selectivity for efficient gas separation

Insights into the thermodynamic–kinetic synergistic separation of propyne/propylene in anion pillared cage MOFs with entropy–enthalpy balanced adsorption sites

“…[12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] Among them, pcu type anion pillared MOFs (APMOFs) with strong Lewis basic functional sites display the benchmark separation performance. [12][13][14][15][16][17][18] Nonetheless, the trade-off between the capacity and selectivity is still a critical problem to overcome. For example, SIFSIX-3-Ni (pore size = 4.2 Å, Scheme 1a) as a single-molecule trap for C 3 H 4 can afford extremely high C 3 H 4 /C 3 H 6 selectivity (>200), but the capacity of C 3 H 4 is only 67 cm 3 /g; SIFSIX-1-Cu (pore size = 8.0 Å, Scheme 1b) can accommodate a large amount of C 3 H 4 (201 cm 3 /g) by cooperative host-guest interactions, but the separation selectivity is <10.…”

“…10 Recently, metal-organic frameworks (MOFs) with tuneable pore size/shape and chemistry have emerged as a new class of porous materials for the separation of C 3 H 4 / C 3 H 6 . [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] Among them, pcu type anion pillared MOFs (APMOFs) with strong Lewis basic functional sites display the benchmark separation performance. [12][13][14][15][16][17][18] Nonetheless, the trade-off between the capacity and selectivity is still a critical problem to overcome.…”

Ligand Configuration-Directed Pillared Kagome-Layer MOFs: Synthesis, Structure, and Adsorption of Propane/Propylene Properties

“…Recently, there has been growing interest in applying metal–organic frameworks (MOFs) that built from the chelation of the organic ligands with metal ions to separate C 3 H 6 from C 3 H 8 or C 3 H 8 from C 3 H 6 in adsorption-based processes, owing to their modular structure with tunable nature . MOFs with pillared-layered structures usually show tailored pore sizes and functionalization, resulting in different diffusion properties of permeating gases in a separation process, such as a series of pillared-layered DTO , TO , DBTO , and BTO MOFs . In the typical construction of pillared-layered MOFs, M 2 (RCOO) 4 (L B ) 2 (L B = bridging ligand) clusters in which both terminal ligands are substituted by bridging linkers are commonly used as six-connected nodes (Scheme ).…”

Multifunctional Petrochemical Separation Adsorbent Based on Micro-Regulation of Cu-BTC Channel

“…As a result, the heat-driven chemical separation processes account for ~50% of US industrial energy consumption [4] . On the contrary, adsorptive separation technology emerged as a promising alternative to distillation due to its inherent mild working conditions and low consumption of energy [5][6][7] . The design and preparation of advanced adsorbents with superior selectivity, decent capacity, reliable regeneration, and good stability are the key to efficient separation and purification processes [8] .…”