CO₂ Capture by a Task-Specific Ionic Liquid

Abstract

Reaction of 1-butyl imidazole with 3-bromopropylamine hydrobromide, followed by workup and anion exchange, yields a new room temperature ionic liquid incorporating a cation with an appended amine group. The new ionic liquid reacts reversibly with CO2, reversibly sequestering the gas as a carbamate salt. The new ionic liquid, which can be repeatedly recycled in this role, is comparable in efficiency for CO2 capture to commercial amine sequestering reagents, and yet is nonvolatile and does not require water to function.

Polyethyleneimine functionalised nanocarbons for the efficient adsorption ofcarbon dioxide with a low temperature of regeneration

“…A second option for the deployment of amines is to tether them to a solid support, and different materials have been investigated. [10] Efforts have been made to improve on the traditional amine system by using ionic liquids, [11] as well as making solid supported amines. [12][13][14][15][16][17] However, there is no significant decrease in the desorption temperature of the CO 2 .…”

Computational Comparison of the Reactions of Substituted Amines with CO2

“…approach that retains the advantages of a liquid absorbant is to tether an amine functionality to either the cation [24] or anion [25] fragment of an ionic liquid. [26,27] In these nonaqueous environments, the exact nature of the amine-CO 2 reaction is not as well understood, and optimization of these materials is largely empirical.…”

Wireless radio frequency detection of greatly simplified polymeric membranes based on a multifunctional ionic liquid

“…As mentioned previously IL's have been shown to bind to a range of d-block elements, plus important target analytes such as CO 2 [49], benzaldehyde and acetone [50]. Recently they have been shown to act as direct sensing materials for acids in aqueous and non-aqueous environments [51].…”