Simultaneously enhanced gas permeability, selectivity and aging stability of carbon molecular sieve membranes by the molecule doping of silicon

Next-generation carbon molecule sieve membranes derived from polyimides and polymers of intrinsic microporosity for key energy intensive gas separations and carbon capture

“…The selection of the polymer precursor is critically important in the preparation of CMS membranes. In the past few decades, polybenzimidazole (PBI), 86,87 cellulose and its derivatives, 88 polyetherimide (PEI), 89 polyimide (PI) and its derivatives, 44,90 and polymers of intrinsic microporosity (PIMs) 91 are the presentative polymer precursors that have been applied in CMS fabrication (shown in Fig. 5).…”

“…40,41 On the other hand, by precisely controlling the pore size and distribution, both high gas permeability and selectivity can be obtained simultaneously, and together with their favorable thermal stability and chemical resistance, CMS membranes have attracted widespread research attention. [42][43][44] In the past few decades, CMS membranes have been intensively studied and applied in many different applications, such as CO 2 separation, 45 H 2 purication and/or recovery, 46 helium (He) separation, 47 and olen/paraffin separation (Fig. 2).…”