Carbon dioxide solubility in a deep eutectic solvent based on choline chloride and urea at T=303.15–343.15K and moderate pressures

Solubilities of carbon dioxide in the eutectic mixture of levulinic acid (or furfuryl alcohol) and choline chloride

“…Recent works explored the possibility of DESs as the absorbents for CO 2 capture. For example, Li's group [34][35][36] have measured the solubility of CO 2 in 1:2 mol choline chloride-urea DES (commercial name: reline), aqueous DES (choline chloride/ethylene glycol, choline chloride/glycerol, choline chloride/malonic acid) systems, aqueous blends of (reline + monoethanolamine). Francisco et al [12] reported the CO 2 capture using natural 1:2 mol (choline chloride + lactic acid) DES.…”

Review on Carbon Dioxide Absorption by Choline Chloride/Urea Deep Eutectic Solvents

“…As Figure 5 shows, there is slight variation in the results between Li et al [9] and Leron et al [10] with the values reported by Leron et al [10] being constantly lower than the values reported by Li et al [9] for the solubility of CO2 in reline. This variation might be related to the fact that Li et al have reported their results in narrow range of temperatures and it might be as well related to the presence of preparation method, raw material sources, and presence of impurities in the prepared DES samples in both works.…”

“…Then, the gas inlet valve was closed, the desired temperature was set, and the system was allowed to reach equilibrium when no change in weight was observed. The pressure was increased to the next desired value by introducing more gas into the system, and the equilibrium experiment was repeated up to 6.0 MPa and temperatures varied from 303.15 K to 343.15 K in 10 K intervals [10]. Figure 5 shows a comparison of CO 2 absorption data performed by Leron et al and compared with similar work reported in the literature [10].…”

“…Since the topic of utilizing DES for CO 2 capture is relatively new, few studies have been performed experimentally. One of the main experimental works that investigated CO 2 solubility in choline chlorine/urea 1 : 2 was reported by Li et al [9], Leron et al [10], and Mirza et al [8].…”

“…In addition, Leron et al [10] studied CO 2 absorption in reline. In their work, approximately 200 mL of the degassed sample was loaded into the microbalance pan.…”