Demonstration of Chemisorption of Carbon Dioxide in 1,3‐Dialkylimidazolium Acetate Ionic Liquids

Abstract

Echte Chemie: Spektroskopische und kristallographische Analysen bestätigen die chemische Reaktion von CO2 mit Carbenen in flüssigen 1,3‐Dialkylimidazoliumacetaten sowie die unterstützende Rolle des Acetations in diesen Reaktionen. Wenn CO2 durch [C2mim][OAc] geleitet wurde, konnte die Bildung des entsprechenden Imidazoliumcarboxylats, [C2mim+‐COO−], beobachtet werden.

An investigation of carbon dioxide capture by chitin acetate/DMSO binary system

“…Zhang and coworkers (Xie et al, 2006) and others (Sun et al, 2015) indicated that the physical dissolution of CO2 within chitin is the sole mechanism responsible for the capturing of the greenhouse gas. In this respect, Rogers group (Barber et al, 2013;Gurau et al, 2011) indicated that identity of the counter anion of the IL played a major role in chitin interaction toward CO2. Their results suggest that presence of acetate anion is necessary to enable imidazolium ring to react with CO2 through carbene chemistry "acetate effect".…”

Membrane modules for CO 2 capture based on PVDF hollow fibers with ionic liquids immobilized

“…Ionic liquids (ILs) are one of the promising compounds for CO 2 gas recovery [1]. ILs are salts that have an organic cation and an inorganic anion and whose melting point is lower than 373 K, and their vapor pressure is negligible [4,5,6]. Additionally, ILs have good thermal stability, high ionic conductivity and solubility in organic media [7].…”

“…On the other hand, an inexpensive and green solvent for industrial applications is an important feature to consider when choosing an ionic liquid for CO 2 absorption. 1-Ethyl-3-methylimidazolium ethyl sulfate, [emim][EtSO 4 ], was selected due to its low viscosity, low toxicity and low cost [15]. CO 2 capture processes on an industrial scale require the application of high temperatures to a stripper re-boiler for solvent regeneration and CO 2 desorption, which poses a main drawback to the energy consumption.…”

“…For this reason, 1-ethyl-3-methylimidazolium acetate, [emim][Ac], is an ideal candidate for CO 2 capture. In addition, [emim][Ac] was chosen because of its high CO 2 solubility and chemical absorption [3,4,8,[12][13][14]. On the other hand, an inexpensive and green solvent for industrial applications is an important feature to consider when choosing an ionic liquid for CO 2 absorption.…”

Recent advances in the synthesis and applications of metal organic frameworks doped with ionic liquids for CO 2 adsorption

“…This effect is driven by strong H-bonding between the anion and the imidazolium C(2) proton which can determine the formation of a transient NHC that reversibly reacts with CO 2 (Fig. 10) [103,104]. Although [C4mim][OAc] have a reduced cost of production due to their elemental composition, their viscosity still remains an operational concern.…”