Ionic degradation inhibitors and kinetic models for CO2 capture with aqueous monoethanolamine

Zhao, Zhijun; Dong, Haifeng; Zhang, Shuai; Cao, Lingdi; Gao, Jubao; Zhang, Xiangping; Zhang, Suojiang

doi:10.1016/j.ijggc.2015.05.001

Cited by 17 publications

(6 citation statements)

References 27 publications

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“…The chemical solvents, like aqueous monoethanolamine (MEA), have the advantages of low cost and easy operation with a mature technology. However, this kind of solvent is easy to degrade, which will cause corrosion problems and high solvent losses and increase the reclaiming costs . In contrast, the physical solvents, like methanol (rectisol) or N -methyl-2-pyrollidone (NMP, Purisol), could be fully regenerated by reducing the pressure and increasing the temperature for pre-combustion CO 2 capture .…”

Section: Introductionmentioning

confidence: 99%

“…However, this kind of solvent is easy to degrade, which will cause corrosion problems and high solvent losses and increase the reclaiming costs. 19 In contrast, the physical solvents, like methanol (rectisol) 20 or N-methyl-2-pyrollidone (NMP, Purisol), 21 could be fully regenerated by reducing the pressure and increasing the temperature for pre-combustion CO 2 capture. 22 However, the drawbacks are that the absorption capacity in these physical solvents is relatively low, and these solvents possibly bring corrosion to the equipment.…”

Section: ■ Introductionmentioning

confidence: 99%

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Molecular Simulation and Experimental Study on Low-Viscosity Ionic Liquids for High-Efficient Capturing of CO₂

et al. 2022

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In recent decades, ionic liquids (ILs) have been developed as an ideal and reversible decarbonization solvent. However, some pitfalls, such as the low CO2 capacity and high viscosity of ILs, limit their further scale up and industrial application. Therefore, in this work, three novel functional ILs [N8881][NIA], [N8881][For], and [N8881][Ac] were synthesized after using a molecular design method to capture CO2 at 303.15–333.15 K and pressures up to 1000 kPa. The experimental results illustrate that [N8881][NIA] presents the smallest viscosity and the highest CO2 solubility. The capacity order is [N8881][NIA] > [N8881][For] > [N8881][Ac] under the same experimental conditions. The CO2 recyclability experiments using [N8881][NIA] show the stability of CO2 solubility after 5 cycles. The quantum chemistry simulations at the level of DFT/B3LYP with 6-311++G(d,p) basis sets were used to study the CO2 absorption mechanism in the studied ILs from the molecular viewpoint. Simulation results illustrated that the higher interaction energy between CO2 and ILs means more CO2 absorbed in these ILs, which agreed well with the experimental results. The atoms in molecules theory and the function of the reduced density gradient were also used to calculate the interactions in these IL–CO2 systems. Results show that the majority of these interactions present an electrostatic character.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Molecular Simulation and Experimental Study on Low-Viscosity Ionic Liquids for High-Efficient Capturing of CO₂

et al. 2022

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“…Such an increase is largely attributed to the excessive consumption of fossil fuels . To mitigate the CO 2 crisis, the conventional method is aqueous amine solutions for chemical absorption of CO 2 ; however, this method exhibits severe inherent drawbacks, including solvent loss, corrosion, and energy-extensive consumption . Thus, it is a promising approach to develop advanced functional materials or technologies for post-combustion capture of CO 2 .…”

Section: Introductionmentioning

confidence: 99%

Efficient Absorption of CO₂ by Introduction of Intramolecular Hydrogen Bonding in Chiral Amino Acid Ionic Liquids

Pan¹,

Zhao²,

Zeng

et al. 2018

Energy Fuels

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Developing advanced materials, such as ionic liquids (ILs), is highly desired for post-combustion capture of carbon dioxide (CO2). In this paper, we first develop a series of chiral amino acid ILs for efficient, fast, and reversible capture of CO2. Our data reveal that the dianionic form of IL is beneficial to the formation of intramolecular hydrogen bonding, which can remarkably mitigate the viscosity increase during CO2 absorption. The enhanced absorption capacity of CO2 in the IL is mainly due to the multi-site absorption from both the amino group and the negative oxygen group. The dominating absorption pathway is that the amino group reacts with CO2 via an intramolecular proton transfer from the amino group to the negative oxygen group, leading to the formation of the intramolecular hydrogen bonding between carbamate and the protonated oxygen group. As a result, the enhanced absorption performance of amino-functionalized ionic liquids (AFILs) is achieved, especially a controllable viscosity change during the uptake, providing an important foundation for building smart absorption systems based on AFILs.

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“…Therefore, their study has been performed in closed vessels with no circulation of liquid and gas and their model is based on initial degradation rates. Other authors make the same assumption and choice in experimental apparatus, e.g., Zhao et al 19 and Bello and Idem. 12 Both approaches lead to variations in experimental conditions.…”

Section: Introductionmentioning

confidence: 99%

Degradation of Amine Solvents in a CO₂ Capture Plant at Lab-Scale: Experiments and Modeling

Delgado¹,

Valentin²,

Bontemps³

et al. 2018

Ind. Eng. Chem. Res.

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Carbon dioxide (CO2) concentrations in the atmosphere have increased significantly over the past century. Many methods have been devised to reduce CO2 industrial emissions, e.g., CO2 postcombustion absorption by amine-based solvents. Solvent degradation losses are very critical in this process, due to economic and environmental issues. The two main degradation pathways of amine-based aqueous solutions in the presence of CO2 are oxidative and thermal degradation. In this work, a lab-scale pilot plant has been set up to carry out degradation experiments during continuous and dynamic cycles of absorption and stripping with three different amine solvents: MEA (monoethanolamine) used as benchmark solvent for CO2 capture, a blend of 1MPZ (1-methylpiperazine) and PZ (piperazine), and a blend of MDEA (methyldiethanolamine) and MEA. The experimental data have been used to assess the performance of CO2 absorption over time and experimental conditions. The variation of CO2 fraction at the gas outlet of the reactor has been used as an indicator of solvent degradation. To simulate the behavior of the plant at different experimental conditions and with each solvent, a dynamic model has been developed, on the basis of the validation of a fast reaction regime. It reproduces accurately the pilot plant’s behavior during the absorption and stripping phases. Among the solvents’ physical properties, the effect of viscosity appears to be the most critical for the CO2 absorption efficiency. Kinetics of solvent degradation has finally been optimized to match experimental observations. Of the three solvents studied, 1MPZ/PZ is the most stable, whereas MEA and MDEA/MEA have quite similar degradation rates.

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Ionic degradation inhibitors and kinetic models for CO2 capture with aqueous monoethanolamine

Cited by 17 publications

References 27 publications

Molecular Simulation and Experimental Study on Low-Viscosity Ionic Liquids for High-Efficient Capturing of CO₂

Molecular Simulation and Experimental Study on Low-Viscosity Ionic Liquids for High-Efficient Capturing of CO₂

Efficient Absorption of CO₂ by Introduction of Intramolecular Hydrogen Bonding in Chiral Amino Acid Ionic Liquids

Degradation of Amine Solvents in a CO₂ Capture Plant at Lab-Scale: Experiments and Modeling

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Ionic degradation inhibitors and kinetic models for CO2 capture with aqueous monoethanolamine

Cited by 17 publications

References 27 publications

Molecular Simulation and Experimental Study on Low-Viscosity Ionic Liquids for High-Efficient Capturing of CO2

Molecular Simulation and Experimental Study on Low-Viscosity Ionic Liquids for High-Efficient Capturing of CO2

Efficient Absorption of CO2 by Introduction of Intramolecular Hydrogen Bonding in Chiral Amino Acid Ionic Liquids

Degradation of Amine Solvents in a CO2 Capture Plant at Lab-Scale: Experiments and Modeling

Contact Info

Product

Resources

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Molecular Simulation and Experimental Study on Low-Viscosity Ionic Liquids for High-Efficient Capturing of CO₂

Molecular Simulation and Experimental Study on Low-Viscosity Ionic Liquids for High-Efficient Capturing of CO₂

Efficient Absorption of CO₂ by Introduction of Intramolecular Hydrogen Bonding in Chiral Amino Acid Ionic Liquids

Degradation of Amine Solvents in a CO₂ Capture Plant at Lab-Scale: Experiments and Modeling