Tae‐Hyun Bae

Well matched: Submicrometer-sized metal–organic framework (MOF) crystals (ZIF-90) were synthesized by a nonsolvent-induced crystallization technique and incorporated in mixed-matrix gas-separation membranes. ZIF-90/6FDA-DAM membranes (empty pink circle; beyond the upper bound for polymer membranes) show unprecedented high performance for CO2/CH4 separation by a MOF-based membrane. The key is the combination of the highly selective MOF and a highly permeable polymer.

MXenes are emerging rapidly as a new family of multifunctional nanomaterials with prospective applications rivaling that of graphenes. Herein, a timely account of the design and performance evaluation of MXene-based membranes is provided. First, the preparation and physicochemical characteristics of MXenes are outlined, with a focus on exfoliation, dispersion stability, and processability, which are crucial factors for membrane fabrication. Then, different formats of MXene-based membranes in the

A series of zeolite adsorbents has been evaluated for potential application in post-combustion CO2 capture using a new high-throughput gas adsorption instrument capable of measuring 28 samples in parallel. Among the zeolites tested, Ca-A exhibits the highest CO2 uptake (3.72 mmol g−1 and 5.63 mmol cm−3) together with an excellent CO2 selectivity over N2 under conditions relevant to capture from the dry flue gas stream of a coal-fired power plant. The large initial isosteric heat of adsorption of

Biogas is an increasingly attractive renewable resource, envisioned to secure future energy demands and help curb global climate change. To capitalize on this resource, membrane processes and state-of-the-art membranes must efficiently recover methane (CH₄) from biogas by separating carbon dioxide (CO₂). Composite (a.k.a. mixed-matrix) membranes, prepared from common polymers and rationally selected/engineered fillers, are highly promising for this application. This review

cross-linking, which forms uniquely strong coordination bonds with oxygen-containing functional groups of SFGO. Other cations were found to be ineffective.

Separation of acetylene from carbon dioxide and ethylene is challenging in view of their similar sizes and physical properties. Metal-organic frameworks (MOFs) in general are strong candidates for these separations owing to the presence of functional pore surfaces that can selectively capture a specific target molecule. Here, we report a novel 3D microporous cationic framework named JCM-1. This structure possesses imidazolium functional groups on the pore surfaces and pyrazolate as a metal bindi

Nanocrystals of M2(dobdc) (M = Mg, Ni, Zn; dobdc4− = 1,4-dioxido-2,5-benzenedicarboxylate), also known as M-MOF-74 or CPO-27-M, with diameters of ∼100 nm or less were synthesized using a room-temperature reaction of 2 h duration. Adsorption data collected for CO2 and N2 show slightly lower surface areas but similar adsorption selectivites relative to the bulk materials. High-quality mixed-matrix membranes containing Mg2(dobdc) nanocrystals were fabricated using three different polymers for testi

Abstract Owing to the increasing need to mitigate excessive organic solvent waste, the efficient separation and recovery of organic solvents have received major research attention in recent years. The membrane‐based organic solvent nanofiltration (OSN) process has demonstrated its feasibility in addressing this problem with low energy costs, compared to conventional separation techniques, such as adsorption, liquid–liquid extraction, and solvent evaporation. Recently, membranes made of 2D graphe

selectivities of membranes, resulting in performances that surpass the upper bound limit for polymer membranes.

HKUST-1, an inexpensive metal–organic framework possessing open metal sites, has a great potential for capture and recovery of SF 6 . In this work, the structural property of HKUST-1 was modified to yield a hierarchically structured HKUST-1 nanocrystal exhibiting a superior performance with higher SF 6 uptake (4.98 mmol g –1 at 25 °C and 1 bar), better SF 6 /N 2 selectivity (∼70 at 25 °C), faster SF 6 adsorpton kinetics, and lower energy penalty for regeneration compared to those of bulk HKUST-1