The dynamic behavior and intrinsic mechanism of CO₂ absorption by amino acid ionic liquids

Abstract

The amino acid ionic liquids have great potential for CO2 absorption in manned confined spaces, such as spacecraft, submarines and other manned equipment.

Design and applications of biocompatible choline amino acid ionic liquids

“…This subtle difference is likely due to the steric hindrance caused by longer alkyl chains of phosphonium ions. 126 Overall, cations can only contribute to the physical absorption of CO 2 , which is less significant than the anion-driven chemisorption process. However, the work of Bhattacharyya and Shah showed that choline functionalisation can be used to engineer physical properties, where ether-functionalised choline AAILs displayed lower viscosity.…”

Chemical similarity of dialkyl carbonates and carbon dioxide opens an avenue for novel greenhouse gas scavengers: cheap recycling and low volatility via experiments and simulations

“…[13][14][15][16][17][18] The current chemisorption solutions are preferentially based on the formation of a carbon-nitrogen covalent bond (viz., alkyl amines and derivatives) and strong oxygen-metal ionic bonds (viz., carbonate looping). [19][20][21] In turn, the physical sorption of CO 2 relies on the electrostatic attraction between the oxygen atoms of CO 2 and the electrondeficient interaction centers of the scavenger or the carbon atom of CO 2 and the electron-rich interaction centers of the scavenger. Although the CO 2 molecule does not possess a dipole moment, its affinity for partially charged moieties is justified by non-zero higher-order electric moments.…”

Intensification of Amino Acid Ionic Liquids with Different Additives for CO2 Capture

“…Through the reaction kinetic parameters of H 2 O, EG, or DMEE, the intensification effect of each binary system on CO 2 capture of AAILs can be unveiled intuitively. 33…”

“…Overall, for the binary systems of AAILs with H 2 O, DMEE, or EG, the absorption processes go through quite different mechanisms, while the related studies are independent and lack systematical comparison and evaluation. Through the reaction kinetic parameters of H 2 O, EG, or DMEE, the intensification effect of each binary system on CO 2 capture of AAILs can be unveiled intuitively On the other hand, for the same absorbent family, the AAILs with different amino acids have different absorption performance since the structures of amino acids also have considerable influences on the absorption properties of AAILs. , Therefore, the improvement of CO 2 capture in different AAILs by the three kinds of additives needs to be evaluated to choose the appropriate AAIL system formula according to industrial needs and energy consumption.…”