A new boron cluster anion pillared metal organic framework with ligand inclusion and its selective acetylene capture properties

Abstract

Separation of acetylene (C2H2) from carbon dioxide (CO2) and ethylene (C2H4) is important in industry but challenging due to the close physical properties. Herein, a novel microporous boron cluster pillared...

A new TIFSIX anion pillared metal organic framework with abundant electronegative sites for efficient C2H2/CO2separation

“…After a complete breakthrough experiment, Ar flow (5 mL min −1 ) was used to desorb the adsorbed gases and regenerate the material at 75 °C. The calculated separation factor for the equimolar C 2 H 2 /CO 2 mixture is 3.0, superior to many popular materials such as BSF-10 (2.8), 28 NKMOF-1-Ni (2.6) 16 and FJU-90 (2.1). 57 Four cycles of breakthrough experiments (Fig.…”

“…Our group has long been interested in the design of new anion hybrid MOFs for light hydrocarbon separation. [26][27][28][29][30][31][32][33][34][35] Particularly, two anions are preferred, i.e. a closo-dodecaborate [B 12 H 12 ] 2− anion [26][27][28][29][30][31][32][33] and a TIFSIX [TiF 6 ] 2− anion.…”

“…[26][27][28][29][30][31][32][33][34][35] Particularly, two anions are preferred, i.e. a closo-dodecaborate [B 12 H 12 ] 2− anion [26][27][28][29][30][31][32][33] and a TIFSIX [TiF 6 ] 2− anion. [34][35][36] Compared to the well-known SIFSIX [SiF 6 ] 2− anion, [TiF 6 ] 2− pillared MOFs have usually shown enhanced chemical and thermal stabilities.…”

Highly Efficient CO2/C2H2 Separation by Porous Graphene via Quadrupole Gating Mechanism

“…C 2 H 2 is mainly produced by the cracking of hydrocarbons or partial combustion of natural gas, in which carbon dioxide (CO 2 ) inevitably coexists as a contaminant and needs to be removed to produce C 2 H 2 with a high purity . Because of their highly similar physical properties (such as boiling points, C 2 H 2 /CO 2 : 189.3/194.7 K) and the same kinetic molecular size (3.3 Å), the separation of C 2 H 2 and CO 2 is among the most difficult and challenging ones. − Traditional technologies for the separation and purification of C 2 H 2 from other gases are generally dependent on cryogenic distillation or solvent extraction, which is either cost-/energy-intensive or associated with pollution. In this context, physisorptive separation based on molecular recognition has attracted particular interest owing to the low cost and energy consumption …”

“…To date, there have been a variety of porous absorbents developed for efficient C 2 H 2 /CO 2 separation. ,− The general gas separation mechanisms can be categorized into three classes: (1) thermodynamic separation based on the different strengths of adsorbent–adsorbate binding affinities; − (2) kinetic separation based on different diffusion rates of adsorbates in porous materials; (3) molecular sieving based on the molecular size of the adsorbate . In comparison, molecular sieving is the most challenging (yet promising) one for C 2 H 2 /CO 2 because C 2 H 2 and CO 2 feature the same kinetic diameters.…”