CO2 absorption with ionic liquids at elevated temperatures

Green synthesis of hypercrosslinked polymers for CO2 capture and conversion: recent advances, opportunities, and challenges

“…For effective utilization of CO 2 , various capture methods have been invented. [7][8][9][10] The most prevalent techniques presently employed include absorption, [11][12][13][14] membrane separation, [15][16][17][18][19][20][21][22][23] adsorption, 24,25 chemical looping cycle, [26][27][28] and low-temperature separation (Fig. 2).…”

Protic Ionic-Liquid-Supported Activated Carbon with Hierarchical Pores for Efficient NH3 Adsorption

“…After that, the ethanol solvent was removed by rotary evaporation and vacuum drying for 24 h to obtain the PIL-supported AC materials (PIL/AC). According to the mass ratio of PIL/AC, the materials were prepared with four different loadings of PIL on AC (10,20,30, and 40 wt %). Two kinds of ACs including AC-980 and AC-CTC60 were used in this work.…”

“…However, water scrubbing causes huge water consumption and high energy consumption for regeneration, and acid scrubbing cannot easily recover NH 3 and causes secondary pollution, which does not satisfy the green and sustainable development. In recent years, ionic liquids (ILs) have been widely used in gas separation, − such as CO 2 , − H 2 S, − SO 2 , − and NH 3 , − because of their low vapor pressure, high thermal stability, and tunable structures. ,, Generally, most works focused on the conventional imidazolium-based ILs, hydroxyl ILs, protic ILs, ,, metal ILs, , and also deep eutectic solvents formed by choline ILs and organic solvents for NH 3 absorption. However, the viscosity of most ILs is very high, which is detrimental to the dispersion and mass transfer of NH 3 in ILs.…”