The utilization of cheap and renewable materials is an important topic in green chemistry. In this work we studied the absorption SO2 by choline chloride (ChCl)–glycerol deep eutectic solvents (DESs) at various temperatures partial pressures, molar ratios ChCl glycerol ranged from 1 : 4 to 1. It was demonstrated that solubility DESs increased as concentration increased. capacity with a ChCl–glycerol ratio could be high 0.678 g per DES 20 °C atm. Moreover, absorbed easily released, their...

Abstract Emission of SO 2 in flue gas from the combustion fossil fuels leads to severe environmental problems. Exploration green and efficient methods capture is an interesting topic, especially at lower partial pressures. In this work, ionic liquids (ILs) 1‐(2‐diethylaminoethyl)‐3‐methylimidazolium bis(trifluoromethylsulfonyl)imide ([Et NEMim][Tf N]) tetrazolate NEMim][Tetz]) were synthesized. The performances two ILs studied under different conditions. It was demonstrated that very for...

Azolide-based deep eutectic solvents exhibit a high CO₂ absorption capacity by forming carbonate species.

In this work, we investigated SO2 absorption by deep eutectic solvents (DESs) formed 1-ethyl-3-methylimidazolium chloride (EmimCl) and ethylene glycol (EG) under different conditions. DESs with molar ratios of EmimCl EG (from 2:1 to 1:2) were prepared. The results showed that all the EmimCl-EG very efficient for capture. It was demonstrated solubility increased increasing concentrations in DESs. effects temperature partial pressure also investigated. Emim-EG (2:1) solvent could absorb 1.15...

Deep eutectic solvents (DESs) formed by bio-phenol-derived superbase ionic liquids (ILs) and ethylene glycol (EG) exhibit a high CO2 capacity, up to 1.0 mol CO2/mol DESs, which is much better than those of the parent ILs. Surprisingly, mechanism results indicate that reacts with EG, but doesn't react phenolic anions in solvent, different from other DESs ILs EG. The reaction pathway between used this work may include two steps. first step acid-base anion forms HO-CH2-CH2-O-, then attached...

We discovered that the synthesis of quinazoline-2,4(1H,3H)-diones from CO2 and 2-aminobenzonitriles could proceed efficiently in water without any catalyst excellent yields were obtained, while reaction did not occur organic solvents. This green simple route to synthesize has great potential for application.

The C₂–H on imidazolium ring mainly interacted with the hydroxyl group of TEG, and EmimCl–TEG DESs have a high SO₂absorption capacity.

We report that deep eutectic solvents can be formed by biobased aprotic organic compound succinonitrile (SN) functionalized as the hydrogen bond donor with solid ionic liquid 1-ethyl-3-methylimidazolium chloride ([Emim][Cl]) or hexafluorophosphate ([Emim][PF6]). The results suggested formation of intermolecular bonds between anions imidazolium salts and C–H SN. Moreover, solvent [Emim][Cl]-SN(1:1) exhibited an attractive SO2 absorption capacity (0.120 g SO2/g solvent) at low partial pressure...

Deep eutectic solvents (DESs) have received a great amount of attention for CO2 uptake due to their unique properties. Here, deep based on 4-fluorophenol-derived superbase ionic liquid are studied capture. The used is [DBUH][4-F-PhO], formed by 1,8-diazabicyclo[5.4.0]undecane-7-ene (DBU) and 4-fluorophenol (4-F-PhOH). DESs obtained mixing [DBUH][4-F-PhO] with ethylene glycol (EG) or 4-F-PhOH. Surprisingly, [DBUH][4-F-PhO]-EG present much higher capacity (∼1.0 mol CO2/mol solvent) than...

In this work, the anion-functionalized deep eutectic solvents (DESs) comprising solid organic salt tetraethylammonium tetrazolate ([N2222][Tetz]) and ethylene glycol (EG) at a molar ratio 1:2 were synthesized to capture SO2. DESs [N2222][Tetz]-EG(1:2) could 0.853 g of SO2/g solvent (4.31 mol SO2/mol solvent) 1.0 atm 20 °C. Interestingly, exhibited high SO2 absorption capacity 0.140 (0.708 2000 ppm, which was much higher than (0.002 or 0.009 non-functionalized consisting chloride...

Deep eutectic solvents (DESs) have been widely used to capture CO2 in recent years. Understanding mechanisms by DESs is crucial the design of efficient for carbon capture. In this work, we studied absorption mechanism based on ethylene glycol (EG) and protic ionic liquid ([MEAH][Im]), formed monoethanolamine (MEA) with imidazole (Im). The interactions between [MEAH][Im]-EG (1:3) are investigated thoroughly applying 1H 13 C nuclear magnetic resonance (NMR), 2-D NMR, Fourier-transform infrared...

CO₂ directly reacts with ethylene glycol by forming a carbonate species in the solvent consisting of 2-piperidineethanol and glycol.

Herein, tetraethylammonium 1,2,3-triazolide ([Et4N][Tz]), 1,2,3-triazole (Tz), and ethylene glycol (EG) are used to form DESs for CO2 capture. Surprisingly, [Et4N][Tz]-EG can react with CO2, but [Et4N][Tz]-Tz cannot although both of the two systems contain same anion [Tz]-. Unexpectedly, addition EG [Et4N][Tz]-Tz, formed ternary [Et4N][Tz]-Tz-EG neither nor before combination them. NMR, FTIR theoretical calculation results disclose that surprise absorption behavior mainly depends on strength...

The phase equilibria of the N2 + CO2 H2O ternary system were determined at 308.15 K and 318.15 under 8.0 MPa, 12.0 16.0 MPa. It was demonstrated that solubility in liquid increased with increase its mole fraction vapor fixed temperature total pressure, reducing or increasing pressure a phase. dependences on phase, temperature, are similar, but much larger than N2. effect NaCl KCl CaCl2 gas mixture water also it shown addition salt reduced gases considerably due to salting-out effect.

Polyethylene glycols (PEGs) are a class of non-toxic, non-volatile, biocompatible, and widely available polymers. In this work, we synthesized N-ethyl-N-(2-(2-(2-methoxyethoxy)ethoxy)ethyl)-2-aminoethanol (EE3AE) that combines the properties PEG amines, N-decyl-N-ethyl-2-aminoethanol (DEAE). Their performances to capture SO2 were studied at different temperatures, pressures, absorption times. The interaction between absorbents characterized by NMR FTIR techniques. It was demonstrated both...

The steric hindrance of –OH groups can be a useful tool to tune CO 2 capture behaviors by deep eutectic solvents.

Here, 1,2,4-triazolide-based ionic liquids (ILs), N-ethyl-N,N-dimethyl-N-(2-methoxyethyl)ammonium 1,2,4-triazolide ([MOEN211][Triz]) and tetraethylammonium ([N2222][Triz]), are used to capture CO2. The interaction results suggest that CO2 reacts with the anion [Triz]– form...

Recently, deep eutectic solvents (DESs), a new type of solvent, have been studied widely for CO2 capture. In this work, the anion-functionalized composed phenol-based ionic liquids (ILs) and hydrogen bond donors (HBDs) ethylene glycol (EG) or 4-methylimidazole (4CH3-Im) were synthesized The ILs used in study prepared from bio-derived phenols carvacrol (Car) thymol (Thy). absorption capacities DESs determined. mechanisms by also using nuclear magnetic resonance (NMR), Fourier transform...

In this work, we studied the CO2 absorption mechanism by nonaqueous solvent comprising hindered amine 2-[(1,1-dimethylethyl)amino]ethanol (TBAE) and ethylene glycol (EG). The NMR FTIR results indicated that reacted with an -OH group of EG rather than TBAE producing hydroxyethyl carbonate species. A possible reaction pathway was suggested, which involves two steps. first step, acid–base between generated anion HO-CH2-CH2-O-; in second O− HO-CH2-CH2-O− attacked C atom CO2, forming

Understanding intermolecular interactions is important for the design of deep eutectic solvents. Herein, potassium carbonate (K2CO3) and ethylene glycol (EG) are used to form The between K2CO3 EG studied using nuclear magnetic resonance (NMR) Fourier transform infrared (FTIR) spectra. Interestingly, interaction results indicate that anion CO32− can react with EG-based organic carbonate, which occur even at room temperature. possible reaction steps presented. As be prepared from CO2 KOH,...

The SO2 absorption capacities of two ionic liquid mixtures formed by 1-ethyl-3-methylimidazolium chloride ([Emim][Cl]) and thiocyanate ([Emim][SCN]) were studied. with different molar ratios [Emim][Cl] [Emim][SCN] (1:1 1:2) can be easily synthesized. solubility in the was investigated under conditions. results demonstrated that these efficient for absorption. [Emim][Cl]–[Emim][SCN](1:1) captured 0.50 g/g solvent at 20 °C 0.10 atm. Under low partial pressure (1960 ppm), could capture 0.11...