Significant Improvement in CO2 Absorption by Deep Eutectic Solvents as Immobilized Sorbents: Computational Analysis

2021 ◽  
Author(s):  
Maryam Heydari Dokoohaki ◽  
Amin Reza Zolghadr
Keyword(s):  
Computational Analysis ◽  
Deep Eutectic Solvents ◽  
Co2 Absorption

scholarly journals Capture of Acidic Gases from Flue Gas by Deep Eutectic Solvents

Processes ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 1268
Author(s):  
Yan Wang ◽  
Shuhang Ren ◽  
Yucui Hou ◽  
Weize Wu
Keyword(s):  
Hydrogen Bond ◽  
Flue Gas ◽  
Deep Eutectic Solvents ◽  
Absorption Capacity ◽  
Physical Interaction ◽  
Co2 Absorption ◽  
Physicochemical Interaction ◽  
Acidic Gases ◽  
New Strategies ◽  
High Absorption

Up to now, many kinds of deep eutectic solvents (DESs) were investigated for the capture of acidic gases from flue gases. In this review, non-functionalized and functionalized DESs, including binary and ternary DESs, for SO2, CO2 and NO capture, are summarized based on the mechanism of absorption, physical interaction or chemical reaction. New strategies for improving the absorption capacity are introduced in this review. For example, a third component can be introduced to form a ternary DES to suppress the increase in viscosity and improve the CO2 absorption capacity. DESs, synthesized with halogen salt hydrogen bond acceptors (HBAs) and functionalized hydrogen bond donors (HBDs), can be used for the absorption of SO2 and NO with high absorption capacities and low viscosities after absorption, due to physicochemical interaction between gases and DESs. Emphasis is given to introducing the absorption capacities of acidic gases in these DESs, the mechanism of the absorption, and the ways to enhance the absorption capacity.

Superbase Ionic Liquid-Based Deep Eutectic Solvents for Improving CO2 Absorption

2020 ◽  
Vol 8 (6) ◽  
pp. 2523-2530 ◽  
Author(s):  
Hong Yan ◽  
Lei Zhao ◽  
Yinge Bai ◽  
Fangfang Li ◽  
Haifeng Dong ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Deep Eutectic Solvents ◽  
Co2 Absorption

Superbase/Acylamido-Based Deep Eutectic Solvents for Multiple-Site Efficient CO2 Absorption

2019 ◽  
Vol 33 (8) ◽  
pp. 7569-7577 ◽  
Author(s):  
Bin Jiang ◽  
Jingwen Ma ◽  
Na Yang ◽  
Zhaohe Huang ◽  
Na Zhang ◽  
...  
Keyword(s):  
Deep Eutectic Solvents ◽  
Co2 Absorption ◽  
Multiple Site

scholarly journals A Comprehensive Study of CO2 Absorption and Desorption by Choline-Chloride/Levulinic-Acid-Based Deep Eutectic Solvents

Molecules ◽  
2021 ◽  
Vol 26 (18) ◽  
pp. 5595
Author(s):  
Mohaned Aboshatta ◽  
Vitor Magueijo
Keyword(s):  
Hydrogen Bond ◽  
Co2 Capture ◽  
Levulinic Acid ◽  
Choline Chloride ◽  
Deep Eutectic Solvents ◽  
Absorption Capacity ◽  
Co2 Absorption ◽  
Operating Pressure ◽  
Hydrogen Bond Acceptor ◽  
Different Temperatures

Amine absorption (or amine scrubbing) is currently the most established method for CO2 capture; however, it has environmental shortcomings and is energy-intensive. Deep eutectic solvents (DESs) are an interesting alternative to conventional amines. Due to their biodegradability, lower toxicity and lower prices, DESs are considered to be “more benign” absorbents for CO2 capture than ionic liquids. In this work, the CO2 absorption capacity of choline-chloride/levulinic-acid-based (ChCl:LvAc) DESs was measured at different temperatures, pressures and stirring speeds using a vapour–liquid equilibrium rig. DES regeneration was performed using a heat treatment method. The DES compositions studied had ChCl:LvAc molar ratios of 1:2 and 1:3 and water contents of 0, 2.5 and 5 mol%. The experimental results showed that the CO2 absorption capacity of the ChCl:LvAc DESs is strongly affected by the operating pressure and stirring speed, moderately affected by the temperature and minimally affected by the hydrogen bond acceptor (HBA):hydrogen bond donator (HBD) molar ratio as well as water content. Thermodynamic properties for CO2 absorption were calculated from the experimental data. The regeneration of the DESs was performed at different temperatures, with the optimal regeneration temperature estimated to be 80 °C. The DESs exhibited good recyclability and moderate CO2/N2 selectivity.

scholarly journals Preparation and Characterization of Deep Eutectic Solvents That Can Be Used in CO2 Absorption Processes

Proceedings ◽  
2020 ◽  
Vol 57 (1) ◽  
pp. 23
Author(s):  
Eliza-Gabriela Mihăilă ◽  
Cristian Florian Dincă ◽  
Marian Deaconu ◽  
Dana Simona Vărășteanu ◽  
Irina Elena Chican ◽  
...  
Keyword(s):  
Co2 Emissions ◽  
Environmental Issues ◽  
Deep Eutectic Solvents ◽  
Global Scale ◽  
Co2 Absorption

CO2 emissions are well-known for creating a lot of environmental issues, at a global scale. [...]

Efficient CO2 absorption by azolide-based deep eutectic solvents

2019 ◽  
Vol 55 (10) ◽  
pp. 1426-1429 ◽  
Author(s):  
Ge Cui ◽  
Meng Lv ◽  
Dezhong Yang
Keyword(s):  
Deep Eutectic Solvents ◽  
Absorption Capacity ◽  
Co2 Absorption ◽  
Carbonate Species

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

scholarly journals The Influence of Hydrogen Bond Donors on the CO2 Absorption Mechanism by the Bio-Phenol-Based Deep Eutectic Solvents

Molecules ◽  
2021 ◽  
Vol 26 (23) ◽  
pp. 7167
Author(s):  
Ze Wang ◽  
Zonghua Wang ◽  
Jie Chen ◽  
Congyi Wu ◽  
Dezhong Yang
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Hydrogen Bond ◽  
Co2 Capture ◽  
Deep Eutectic Solvents ◽  
Reaction Pathways ◽  
Co2 Absorption ◽  
Absorption Mechanism ◽  
New Type ◽  
Steric Hinderance ◽  
Hydrogen Bond Donors

Recently, deep eutectic solvents (DESs), a new type of solvent, have been studied widely for CO2 capture. In this work, the anion-functionalized deep eutectic solvents composed of phenol-based ionic liquids (ILs) and hydrogen bond donors (HBDs) ethylene glycol (EG) or 4-methylimidazole (4CH3-Im) were synthesized for CO2 capture. The phenol-based ILs used in this study were prepared from bio-derived phenols carvacrol (Car) and thymol (Thy). The CO2 absorption capacities of the DESs were determined. The absorption mechanisms by the DESs were also studied using nuclear magnetic resonance (NMR), Fourier transform infrared (FTIR), and mass spectroscopy. Interestingly, the results indicated that CO2 reacted with both the phenolic anions and EG, generating the phenol-based carbonates and the EG-based carbonates, when CO2 interacted with the DESs formed by the ILs and EG. However, CO2 only reacted with the phenolic anions when the DESs formed by the ILs and 4CH3-Im. The results indicated that the HBDs impacted greatly on the CO2 absorption mechanism, suggesting the mechanism can be tuned by changing the HBDs, and the different reaction pathways may be due to the steric hinderance differences of the functional groups of the HBDs.

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