Mechanistic Study on the Removal of NO2 from Flue Gas Using Novel Ethylene Glycol-tetrabutylammonium Bromide Deep Eutectic Solvents

In this study, CO2 and SO2 captures from post-combustion flue gas from a pulverized coal-fired power plant were evaluated using deep eutectic solvents (DES) to replace existing mono-ethanol amine (MEA) and CanSolv technologies. The system design of the DES-based CO2 and SO2 capture was based on the National Energy Technology Laboratory’s (NETL) 550 MWe pulverized coal-fired power plant model using Illinois #06 coal. Two of the most studied DES (choline chloride and urea at a 1:2 molar ratio and methyltriphenylphosphonium bromide (METPB) and ethylene glycol at a 1:3 molar ratio) for CO2 and SO2 capture were evaluated for this system analysis. Physical properties of DES were evaluated using both density functional theory (DFT)-based modeling as well as with documented properties from the literature. A technoeconomic assessment (TEA) was completed to assess DES ability to capture CO2 and SO2. Both solvents were able to fully dissolve and capture all SO2 present in the flue gas. It was also found from the system analyses that choline chloride and urea outperformed METPB and ethylene glycol (had a lower final cost) when assessed at 10–30% CO2 capture at high operating pressures (greater than 10 bar). At high system sizes (flow rate of greater than 50,000 kmoles DES per hour), choline chloride:urea was more cost effective than METPB:ethylene glycol. This study also establishes a modeling framework to evaluate future DES for physical absorption systems by both thermophysical and economic objectives. This framework can be used to greatly expedite DES candidate screening in future studies.

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Investigation of tetrabutylammonium bromide-glycerol-based deep eutectic solvents and their mixtures with water by spectroscopic techniques

Journal of Molecular Liquids ◽

10.1016/j.molliq.2021.115617 ◽

2021 ◽

Vol 330 ◽

pp. 115617

Author(s):

Renáta Chromá ◽

Mária Vilková ◽

Ivan Shepa ◽

Patrycja Makoś-Chełstowska ◽

Vasil Andruch

Keyword(s):

Tetrabutylammonium Bromide ◽

Deep Eutectic Solvents ◽

Spectroscopic Techniques

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Capture of Acidic Gases from Flue Gas by Deep Eutectic Solvents

Processes ◽

10.3390/pr9081268 ◽

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.

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Formation of Double-Cone-Shaped ZnO Mesocrystals by Addition of Ethylene Glycol to ZnO Dissolved Choline Chloride–Urea Deep Eutectic Solvents and Observation of Their Manners of Growth

CrystEngComm ◽

10.1039/d1ce01049b ◽

2021 ◽

Author(s):

Hajime Wagata ◽

Ginji Harada ◽

Eriko Nakashima ◽

Motoki Asaga ◽

Tomoaki Watanabe ◽

...

Keyword(s):

Ethylene Glycol ◽

Choline Chloride ◽

Deep Eutectic Solvents ◽

Double Cone ◽

Crystal Shapes ◽

Physical And Chemical

ZnO mesocrystals have been explored for various physical and chemical applications. In spite of effort by a number of researches, it is still difficult to grow specific crystal shapes in...

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Betaine + (Glycerol or Ethylene Glycol or Propylene Glycol) Deep Eutectic Solvents for Extractive Purification of Gasoline

ChemistrySelect ◽

10.1002/slct.201803251 ◽

2018 ◽

Vol 3 (44) ◽

pp. 12582-12590 ◽

Cited By ~ 9

Author(s):

Kristina Zagajski Kučan ◽

Marijana Perković ◽

Karlo Cmrk ◽

Dominik Načinović ◽

Marko Rogošić

Keyword(s):

Ethylene Glycol ◽

Propylene Glycol ◽

Deep Eutectic Solvents

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Cross-dehydrogenative coupling reaction using copper oxide impregnated on magnetite in deep eutectic solvents

Green Chemistry ◽

10.1039/c5gc01745a ◽

2016 ◽

Vol 18 (3) ◽

pp. 826-833 ◽

Cited By ~ 39

Author(s):

Xavier Marset ◽

Juana M. Pérez ◽

Diego J. Ramón

Keyword(s):

Ethylene Glycol ◽

Copper Oxide ◽

Choline Chloride ◽

Deep Eutectic Solvent ◽

Coupling Reaction ◽

Deep Eutectic Solvents ◽

Dehydrogenative Coupling

The synthesis of different tetrahydroisoquinolines using choline chloride : ethylene glycol as a deep eutectic solvent (DES) and copper(ii) oxide impregnated on magnetite as a catalyst has been accomplished successfully.

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Physical properties of deep eutectic solvents formed by the sodium halide salts and ethylene glycol, and their mixtures with water

Journal of Molecular Liquids ◽

10.1016/j.molliq.2018.08.045 ◽

2018 ◽

Vol 269 ◽

pp. 694-702 ◽

Cited By ~ 13

Author(s):

M.A. Sedghamiz ◽

S. Raeissi

Keyword(s):

Ethylene Glycol ◽

Physical Properties ◽

Deep Eutectic Solvents ◽

Halide Salts

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Tetraethylammonium Acetate and Tetraethylammonium Bromide-Based Deep Eutectic Solvents as Thermodynamic CO2 Gas Hydrate Inhibitors

Applied Sciences ◽

10.3390/app10196794 ◽

2020 ◽

Vol 10 (19) ◽

pp. 6794

Author(s):

Vinayagam Sivabalan ◽

Nurasyikin Hasnor ◽

Bhajan Lal ◽

Zamzila Kassim ◽

Abdulhalim Shah Maulud

Keyword(s):

Hydrogen Bond ◽

Ethylene Glycol ◽

Gas Hydrate ◽

Deep Eutectic Solvents ◽

Molar Ratio ◽

Tetraethylammonium Bromide ◽

Hydrate Dissociation ◽

Co2 Gas ◽

Vapor Equilibrium ◽

Liquid Vapor

The thermodynamic gas hydrate suppression behavior of four Deep Eutectic Solvents (DESs) was evaluated in this paper. The mixtures of Hydrogen Bond Acceptors (HBA), Tetraethylammonium Acetate (TEAAC), and Tetraethylammonium Bromide (TEAB) with Hydrogen Bond Donors (HBD), Mono-Ethylene Glycol (MEG), and Glycerol were used to make the DES. The DESs were made at a 1:7 molar ratio for the combinations of TEAAC:MEG, TEAAC:Glycerol, TEAB:MEG, and TEAB:Glycerol. The Hydrate Liquid-Vapor Equilibrium (HLVE) data for CO2 were evaluated through the T-cycle method at different temperature (273.15–283.15 K) and pressure (2–4 MPa) conditions in the presence and absence of 5 wt % aqueous DES solutions. The inhibition effects showed by the DESs, including average suppression temperature (ΔŦ) and gas hydrate dissociation enthalpies (ΔHdiss), were also calculated. The average suppression temperature values of the DESs ranged between 0.4 and 2.4, with the highest inhibition to lowest inhibition order being TEAB:Glycerol > TEAB:MEG > TEAAC:Glycerol > TEAAC:MEG. A comparison of the DES with conventional Thermodynamic Hydrate Inhibitors (THIs) showed that studied Deep Eutectic Solvents had better gas hydrate inhibition. The results proved that DES has the potential to be one of the promising alternatives in gas hydrate inhibition.

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