Abstract
Nanocomposites of ionic liquid, 1-butyl-3-methylimidazolium tetrafluoroborate (BmimBF4), in three-dimensional mesoporous silica (KIT-6) were fabricated and utilized as mesopore-confined ionic liquid membranes for Olefin and CO2 Separation. Compared to neat BmimBF4, the fabricated membrane showed 10-times-enhanced gas permeation property for olefin separation, and 5-times-enhanced gas permeation property for CO2 separation with gas-selectivity remaining unchanged. Moreover, the enhanced diffusion-limited current density of the electrochemical cell involving I-/I3- redox couple in BmimBF4/KIT-6 nanocomposite was observed. This implies that mesoporous KIT-6 can be used as an effective additive in nanocomposite membranes for enhanced olefin and CO2 permeance.
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