Tailoring the Pore Size and Chemistry of Ionic Ultramicroporous Polymers for Trace Sulfur Dioxide Capture with High Capacity and Selectivity.

Here we demonstrate the deep removal of SO with high uptake capacity (1.55 mmol g ) and record SO /CO selectivity (>5000) at ultra-low pressure of 0.002 bar, using ionic ultramicroporous polymers (IUPs) with high density of basic anions.

Energy-efficient separation alternatives: metal-organic frameworks and membranes for hydrocarbon separation.

Hydrocarbon separation is one of the most critically important and complex industrial separation processes, offering versatile bulk chemicals and vital support to the national economy. Traditional separation technologies, such as cryogenic distillation and solvent extraction, are energy-intensive and cause serious environmental stress. Moreover, the growth of industries and technologies and the greater requirements for products (e.

A Single-Molecule Propyne Trap: Highly Efficient Removal of Propyne from Propylene with Anion-Pillared Ultramicroporous Materials.

Propyne/propylene (C H /C H ) separation is a critical process for the production of polymer-grade C H . However, optimization of the structure of porous materials for the highly efficient removal of C H from C H remains challenging due to their similar structures and ultralow C H concentration. Here, it is first reported that hybrid ultramicroporous materials with pillared inorganic anions (SiF = SIFSIX, NbOF = NbOFFIVE) can serve as highly selective C H traps for the removal of trace C H from C H .