CO₂ Absorption Property of Ionic Liquid and CO₂ Permselectivity for Ionic Liquid Membrane

Abstract

The aim of this review is to provide some information on the CO2 absorption property of ionic liquids and the CO2 permselectivity for the separation membranes using ionic liquids. Ionic liquids are a unique solvent, of which the characteristics are non-volatile, non-flammable, miscible with various chemicals, and so on. The CO2 capture using ionic liquids is a promising technology, and a variety of studies have been reported on the natures of the ionic liquid absorbents and membranes. This review presents some fundamental data on the following three topics: (1) the CO2 solubility in the ionic liquid physical absorbents; (2) the high-pressure CO2 absorption behavior for the ionic liquid chemical absorbents; (3) the CO2 permselectivity for the inclusion membranes with ionic liquids and polymers. The first two topics describe the effects of the chemical structures of ionic liquids on the CO2 solubility, in particular, in terms of the oxygen containing groups and the interionic interactions. The second topic also contains how amino acid anions affect the physical and chemical absorptions under high CO2 pressure conditions. The last topic reported that the CO2 and N2 permeations in the inclusion membranes depend on the composition and kind of polymers.

Carbon Nanotube-Based Ionanofluids for Efficient Energy Storage: Thermophysical Properties’ Determination and Advanced Data Analysis

“…Figure shows the measured electrical conductivity values of the base IL compared to the available literature data. ,,,,,,− MG marginal analysis and Vogel–Tamman–Fulcher (VTF) regression were carried out to compare our data with the literature values. The electrical conductivity of pure IL increases with the increase in temperature.…”

“…Measured and literature data values of electrical conductivity of [C 2 mim]­[Tf 2 N] and marginal analysis ,,,,,,− (TI (Z 0L /Z 0U ) and DI (Z L /Z U )).…”

The solubility of gases in ionic liquids

“…New materials are also being developed for gas sensors, supported IL membranes (SILMs) and poly(IL) membranes, carbon capture and chemical reaction using supported IL phases (SILPs), where the IL is confined on the surface or in the pores of the material . Professor Daniel Armstrong at the University of Texas in Arlington has developed a new class of capillary GC columns with stationary phases based on ILs.…”

Renewable absorbents for CO2 capture: from biomass to nature

“…Promising CO 2 absorbents including amino acid salts, choline‐based deep eutectic solvents, blended amines, ionic liquid, and biphasic CO 2 absorbents have been extensively reviewed recently. These reviews tend towards the summarization of CO 2 reaction mechanisms and assessment of absorbent properties for industrial applications, such as cyclic capacity, absorption rate, and process stability.…”