One-Step Butadiene Purification in a Sulfonate-Functionalized Metal-Organic Framework through Synergistic Separation Mechanism.

Porous materials that could recognize specific molecules from complex mixtures are of great potential in improving the current energy-intensive multistep separation processes. However, due to the highly similar structures and properties of the mixtures, the design of desired porous materials remains challenging. Herein, a sulfonate-functionalized metal-organic framework ZU-609 with suitable pore size and pore chemistry is designed for 1,3-butadiene (CH) purification from complex C4 mixtures.

A molecular sieve with ultrafast adsorption kinetics for propylene separation.

The design of molecular sieves is vital for gas separation, but it suffers from a long-standing issue of slow adsorption kinetics due to the intrinsic contradiction between molecular sieving and diffusion within restricted nanopores. We report a molecular sieve ZU-609 with local sieving channels that feature molecular sieving gates and rapid diffusion channels. The precise cross-sectional cutoff of molecular sieving gates enables the exclusion of propane from propylene.

Polycatenated Molecular Cage-Based Propane Trap for Propylene Purification with Recorded Selectivity.

The propane (CH)-selective adsorption technology is recognized as a promising energy-efficient way to directly afford high-purity propylene (CH). Here, a novel strategy via cage construction, combining with multiple interaction and shape selectivity, was raised to achieve preferential CH adsorption. We revealed that the polycatenated molecular cage within a microporous framework of [Ni(bpe)(WO)] (bpe = 1,2-bis(4-pyridyl)ethylene) showed preferential CH adsorption behavior with recorded CH/CH selectivity (1.

A novel interpenetrated anion-pillared porous material with high water tolerance afforded efficient CH/CH separation.

Porous material-based adsorption technology enables greatly reduced energy consumption and is recognized as a promising solution to change the current energy-intensive conditions in gas separation. Here, a new water stable interpenetrated anion-pillared metal-organic framework ZU-62-Ni affording highly efficient C2H2/C2H4 separation was designed.