CO2 absorption mechanism in aqueous ternary solutions of alkanolamines: Experimental and thermodynamic modeling approaches

Kim, Seung-Mo; Kim, Kyung-Min; Choi, Bong-Keun; Mun, Jihun; Shin, Beomju; Lee, Ugwiyeon; Shin, Chae‐Ho; Choi, Jong-Moon; Min, Byoung-Moo; Lee, Ung; Moon, Jong-Ho

doi:10.1016/j.cej.2021.132044

Cited by 14 publications

(6 citation statements)

References 79 publications

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“…The baseline solvent for CO 2 capture, MEA, was proposed by R. R. Bottoms back in 1930 126 . Carbamate salt formed when CO 2 reacts with MEA is stable and requires a large amount of energy to break down the carbamate bond to release the captured CO 2 127‐131 . The total thermal energy requirement for regeneration of CO 2 from MEA solvent in a PCC plant is huge, in the range 3.5–4 GJ t −1 CO 2 .…”

Section: Process Intensification Options For Pccmentioning

confidence: 99%

“…The blended solvent approach has attracted a lot of interest in recent times to see the possibilities of addressing the challenges associated with the use of most of the amine-based solvents. Kim et al 129 studied the CO 2 absorption mechanism in aqueous ternary solutions of MEA, diisopropanolamine (DIPA) and 2-amino-2-methyl-propanol (AMP) over a wide temperature range and several blending ratios (MEA:DIPA:AMP) on carbomate, bicarbomate and carbomate molar fractions in the liquid phase, CO 2 cyclic capacity, CO 2 loading and heat of absorption. Therefore, for effective blending of amine solvent both absorption equilibrium and solvent kinetics must be considered simultaneously.…”

Section: Modified Packing For Enhanced Co 2 Capturementioning

confidence: 99%

“…126 Carbamate salt formed when CO 2 reacts with MEA is stable and requires a large amount of energy to break down the carbamate bond to release the captured CO 2 . [127][128][129][130][131] The total thermal energy requirement for regeneration of CO 2 from MEA solvent in a PCC plant is huge, in the range 3.5-4 GJ t −1 CO 2 . The drawbacks associated with amine-based CO 2 capture solvents include high volatility and corrosiveness of the amine solution as well as a high parasitic energy penalty during CO 2 stripping.…”

Section: Modified Packing For Enhanced Co 2 Capturementioning

confidence: 99%

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Novelty in fossil fuel carbon abatement technologies in the 21^st Century: post‐combustion carbon capture

Joel

Isa

2022

J of Chemical Tech & Biotech

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A global net zero target by mid-century and keeping the maximum global temperature rise to below 1.5 °C was agreed by nearly 200 nations at the 26th UN Climate Change Conference of the Parties. The Intergovernmental Panel on Climate Change advises that emission cuts by 45% are needed by 2030 in order to maintain the global temperature rise below the 1.5 °C target. To achieve this target, it is necessary to investigate technological options that are economically viable and globally acceptable for commercial deployment. This review paper looks at the new technologies needed to reduce CO 2 emission and to motivate commercial deployment, considering that the commercial deployment of CO 2 has been slowed down as a result of high capital and operating expenses which invariably increase the cost of energy. The paper presents a review on early years of process intensification technologies as well as a discussion on potential new process intensification options for CO 2 capture, with suggestions on how to modify those technologies for suitable application to solvent-based carbon capture. The work further discusses current process intensification technologies used for CO 2 capture applications. Solvent developments for enhancing CO 2 capture also are discussed as they contribute to cutting down the sizes of the units as well as decreasing the cost of regeneration which leads to reduction in capital and operating costs. A process flow diagram using a mop fan for capture of CO 2 from buildings is proposed. In addition, a new flow diagram is proposed for using loop reactor technology to capture CO 2 from large point sources, and finally a new process diagram using rotating packed bed absorber combined with sono-assisted regenerator is presented for improved performance of CO 2 capture technology. Recommendations on these diagrams are made to help ensure transition toward the net zero target.

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Section: Process Intensification Options For Pccmentioning

confidence: 99%

Section: Modified Packing For Enhanced Co 2 Capturementioning

confidence: 99%

Section: Modified Packing For Enhanced Co 2 Capturementioning

confidence: 99%

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Novelty in fossil fuel carbon abatement technologies in the 21^st Century: post‐combustion carbon capture

Joel

Isa

2022

J of Chemical Tech & Biotech

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“…The potential shift exhibited a saturated behavior on the 1-CO 2 concentration and was controlled by the associated constants for the binding of H1 and its reduced form based on the Nernst equation. 28 Control experiments using diethanolamine 2, 2-(methylamino) ethanol 3, triethanolamine 4, and 2-diisopropylaminoethanol 5 to replace 1 led to reduction potential shifts of the reduction CO 2 adducts 29,30 (Figure 2e). The obvious spectral variation and isosbestic points in the absorption spectral titration of H1 upon the addition of these CO 2 adducts demonstrated the formation of a host−guest complex (Figures S5, S6, and S13−S16).…”

Section: ■ Introductionmentioning

confidence: 99%

Enzymatic Activation and Continuous Electrochemical Production of Methane from Dilute CO₂ Sources with a Self-Healing Capsule

Wang,

Jing,

Yang

et al. 2024

J. Am. Chem. Soc.

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Converting dilute CO 2 source into value-added chemicals and fuels is a promising route to reduce fossil fuel consumption and greenhouse gas emission, but integrating electrocatalysis with CO 2 capture still faced marked challenges. Herein, we show that a self-healing metal−organic macrocycle functionalized as an electrochemical catalyst to selectively produce methane from flue gas and air with the lowest applied potential so far (0.06 V vs reversible hydrogen electrode, RHE) through an enzymatic activation fashion. The capsule emulates the enzyme' pocket to abstract one in situ-formed CO 2 -adduct molecule with the commercial amino alcohols, forming an easy-to-reduce substrate-involving clathrate to combine the CO 2 capture with electroreduction for a thorough CO 2 reduction. We find that the self-healing system exhibited enzymatic kinetics for the first time with the Michaelis−Menten mechanism in the electrochemical reduction of CO 2 and maintained a methane Faraday efficiency (FE) of 74.24% with a selectivity of over 99% for continuous operation over 200 h. A consecutive working lab at 50 mA•cm −2 , in an eleven-for-one (10 h working and 1 h healing) electrolysis manner, gives a methane turnover number (TON) of more than 10,000 within 100 h. The integrated electrolysis with CO 2 capture facilitates the thorough reduction of flue gas (ca. 13.0% of CO 2 ) and first time of air (ca. 400 ppm of CO 2 to 42.7 mL CH 4 from 1.0 m 3 air). The new self-healing strategy of molecular electrocatalyst with an enzymatic activation manner and anodic shifting of the applied potentials provided a departure from the existing electrochemical catalytic techniques.

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“…Designing liquid solvents with varying affinities for gases is a common strategy in gas separation, exploiting differences in gas solubilities to enhance process efficiency. However, traditional liquid solvents such as aqueous inorganic acids, 17 ammonia water, 18 and aqueous alkanolamines 19,20 used for gas separation are highly volatile and lack structural designability, thereby highlighting the need for investigating new liquid solvents that possess low volatility and high structural designability for gas separation.…”

Section: Introductionmentioning

confidence: 99%

Evaluating diethanolammonium chloride as liquid solvent for gas separation from experiments and theoretical calculations

Zhang,

Fang,

Zheng

et al. 2023

AIChE Journal

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This study explored diethanolammonium chloride ([DEA]Cl) as a potential ionic liquid from low‐cost and commercial ones for gas separation. There are three kinds of functional sites in [DEA]Cl: acidic NH2+, hydrogen‐bond OH, and nucleophilic Cl−. The separation of NH3/N2/H2, SO2/CO2/N2, and H2S/CO2/CH4 was considered, because the three mixtures are extensively involved in many industrial processes. The experimental results demonstrated that [DEA]Cl exhibited excellent ability to separate the mixture of NH3/N2/H2. The [DEA]Cl also exhibited the proper capacity to separate SO2/CO2/N2, but the capacity of [DEA]Cl for the separation of H2S/CO2/CH4 was inferior. The theoretical calculations revealed that NH2+ and OH worked synergistically to contribute to the ability of [DEA]Cl for excellent separation of NH3 from NH3/N2/H2, with Cl− contributing to the proper separation of SO2 from SO2/CO2/N2. This study provides experimental and theoretical basis for the industrial application of [DEA]Cl in the area of gas separation.

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CO2 absorption mechanism in aqueous ternary solutions of alkanolamines: Experimental and thermodynamic modeling approaches

Cited by 14 publications

References 79 publications

Novelty in fossil fuel carbon abatement technologies in the 21^st Century: post‐combustion carbon capture

Novelty in fossil fuel carbon abatement technologies in the 21^st Century: post‐combustion carbon capture

Enzymatic Activation and Continuous Electrochemical Production of Methane from Dilute CO₂ Sources with a Self-Healing Capsule

Evaluating diethanolammonium chloride as liquid solvent for gas separation from experiments and theoretical calculations

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CO2 absorption mechanism in aqueous ternary solutions of alkanolamines: Experimental and thermodynamic modeling approaches

Cited by 14 publications

References 79 publications

Novelty in fossil fuel carbon abatement technologies in the 21st Century: post‐combustion carbon capture

Novelty in fossil fuel carbon abatement technologies in the 21st Century: post‐combustion carbon capture

Enzymatic Activation and Continuous Electrochemical Production of Methane from Dilute CO2 Sources with a Self-Healing Capsule

Evaluating diethanolammonium chloride as liquid solvent for gas separation from experiments and theoretical calculations

Contact Info

Product

Resources

About

Novelty in fossil fuel carbon abatement technologies in the 21^st Century: post‐combustion carbon capture

Novelty in fossil fuel carbon abatement technologies in the 21^st Century: post‐combustion carbon capture

Enzymatic Activation and Continuous Electrochemical Production of Methane from Dilute CO₂ Sources with a Self-Healing Capsule