The capture of SO 2 from flue gases is a worldwide concern, which is closely related to environmental, economical, and technological issues. Ionic liquids (ILs), as a kind of promising acidic gas absorbent, have been attracting increasing attention for innovative SO 2 capture approaches recently, burgeoning in the literature. In this paper, we give an overview of the relevant current progress on IL-mediated SO 2 capture, focusing on promising strategies of improving SO 2 absorption capacity, reducing desorption enthalpy, the design of green IL absorbents, and technologies of SO 2 / CO 2 selective capture, eutectic ILs, supported ILs, and IL membranes, based on depiction of the corresponding SO 2 absorption mechanism.
Herein, in situ generated efficient catalysts were designed for fixation of CO2 to cyclic carbonates under mild conditions. Zinc bromide and N,N‐dibenzyl‐N,N‐dimethylammonium bromide, being proved as active catalyst species, were in situ generated from cheap Zn powder, dimethyl formamide and benzyl bromide, and catalyzed the cycloaddition reaction of CO2 and various terminal epoxides in moderate to excellent yields at 80 °C and atmospheric pressure of CO2. The protocol circumvents the preparation of active catalysts, simultaneously possesses good catalytic activity under mild conditions.
A CO2-induced ROCO2Na/ROCO2H buffer solution is developed and employed in the carboxylative cyclization of propargyl alcohol to generate α-alkylene cyclic carbonates.
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