Sorption-enhanced membrane materials for gas separation: a road less traveled

Publication date: June 2018Source: Current Opinion in Chemical Engineering, Volume 20Author(s): Maryam Omidvar, Hien Nguyen, Junyi Liu, Haiqing LinSolubility and diffusivity constitute two vertically tunable parameters for designing high-performance membrane materials for gas separation. The latter approach has received great attention, yielding a wealth of size-sieving materials reported in the literature. By contrast, this review highlights recent achievements of sorption-enhanced materials with superior gas separation performance, including fluorinated polymers for He/gas and gas/CH4 separations, and polar polymers and mixed-matrix materials comprising metal–organic frameworks for olefin/paraffin separations. The under-valued solubility and solubility selectivity are powerful tools in designing materials with superior separation properties and good resistance to plasticization caused by condensable components in the feed, which, otherwise, would decrease gas selectivity.Graphical abstract

Source: Current Opinion in Chemical Engineering - July 5, 2018 Category: Chemistry Source Type: research