Absorption and thermodynamic properties of CO<sub>2</sub> by amido-containing anion-functionalized ionic liquids

Huang, Yanjie; Cui, Guokai; Wang, Jianji; Li, Zhiyong

doi:10.1039/c8ra07832g

Cited by 22 publications

(10 citation statements)

References 35 publications

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“…CO 2 chemisorption can be realized by inserting amino groups in their molecular components to allow their reaction with CO 2 to form carbamates or carbamic acids. 18 − 23 …”

Section: Introductionmentioning

confidence: 99%

“…Ionic liquids (ILs) have been proposed as an alternative to aqueous amine solutions for CO 2 capture since the early years of the past decade and the study of these task-specific ILs is, at the moment, a very active field of research recently summarized in previous reviews. − The typical advantage of ILs over other solvents lies in their negligible vapor pressure and in their tunable chemical composition, which allows them to be optimized for specific tasks. , CO 2 absorption by ILs can be achieved by both physisorption and chemisorption, with the latter often having a greater efficiency. CO 2 chemisorption can be realized by inserting amino groups in their molecular components to allow their reaction with CO 2 to form carbamates or carbamic acids. − …”

Section: Introductionmentioning

confidence: 99%

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CO₂ Capture in Biocompatible Amino Acid Ionic Liquids: Exploring the Reaction Mechanisms for Bimolecular Absorption Processes

Onofri

Bodo

2021

J. Phys. Chem. B

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CO 2 capture at the production site represents one of the accessible ways to reduce its emission in the atmosphere. In this context, CO 2 chemisorption is particularly advantageous and is often based on exploiting a liquid containing amino groups that can trap CO 2 due to their propensity to react with it to yield carbamic derivatives. A well-known class of ionic liquids based on amino acid anions might represent an ideal medium for CO 2 capture because, at difference with present implementations, they are known to be fully biocompatible. One of the problems is however the relatively low molar ratio of CO 2 absorption. Increasing this ratio turns out to be possible by choosing appropriate anions. We present here a set of accurate computations to elucidate the possible reaction paths that allow the anion to absorb two CO 2 molecules, thus effectively doubling the overall intake. An extensive exploration of some reaction mechanisms suggests that some of them might be quite efficient even under mild conditions.

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“…CO 2 chemisorption can be realized by inserting amino groups in their molecular components to allow their reaction with CO 2 to form carbamates or carbamic acids. 18 − 23 …”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

CO₂ Capture in Biocompatible Amino Acid Ionic Liquids: Exploring the Reaction Mechanisms for Bimolecular Absorption Processes

Onofri

Bodo

2021

J. Phys. Chem. B

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“…Ionic liquids (ILs), which have many unique properties, such as high thermal stability, negligible vapor pressure, high CO 2 capacity, and adjustable structure, are good candidates for CO 2 absorption. − Normal ILs, − which only have physical interaction with CO 2 , can hardly be used for CO 2 capture from flue gas. Functional IL for CO 2 absorption was first reported by Davis et al, and the CO 2 capacity could reach almost 0.5 mol CO 2 /mol IL at 22 °C and ambient pressure.…”

Section: Introductionmentioning

confidence: 99%

Hydrophobic Functional Deep Eutectic Solvents Used for Efficient and Reversible Capture of CO₂

Hou

Ren

et al. 2020

ACS Omega

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CO2 emission from flue gas is an important issue threatening human survival. Deep eutectic solvents (DESs), which have many unique properties, have been studied for CO2 capture. However, water can be absorbed by DESs during the absorption of CO2, which may increase the energy cost during the desorption of CO2. In this work, a new kind of hydrophobic functional DES formed by polyamine hydrochloride and thymol was synthesized and used for CO2 capture. It had been found that these DESs could efficiently capture CO2 even at low partial pressures. The CO2 capacity of [TEPA]Cl-thymol (n [TEPA]Cl/n thymol = 1:3) was high up to 1.355 mol CO2/mol DES at 40 °C and 101.3 kPa. Interestingly, these DESs were still hydrophobic after saturated with CO2. The CO2 absorption capacity increased with a decrease of temperature and an increase of CO2 partial pressure. Regeneration results showed that no obvious loss in the capacity could be found after five absorption/desorption cycles of these DESs. The Fourier transform infrared (FT-IR) spectra indicated that CO2 could interact with amino in the DESs by the formation of carboxylate. Moreover, the equilibrium constant and Henry’s law constant in chemical absorption and physical absorption were studied.

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“…As a result, the volatility of organosilicon would be reduced correspondingly. 18 The absorption enthalpy and entropy of the reaction process were calculated by linear fitting of the Van't Hoff equation. The optimal SO 2 absorption and desorption temperatures at a certain pressure were obtained according to a proposed objective function.…”

Section: Introductionmentioning

confidence: 99%

Low viscous aminoalkyl‐phenyl‐silane with π–π interaction and its optimal SO₂ capture condition

et al. 2022

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The high viscosity of ionic liquids (ILs) limits their practical application in SO2 capture. In this work, the low viscous aminoalkyl‐phenyl‐silanes were synthesized to capture SO2. The π–π interaction between phenyl groups reduced the volatility of aminoalkyl‐phenyl‐silanes greatly, but it did not increase their viscosity significantly. Among them, N‐[(dimethylphenylsilyl)methyl]‐N‐methylbenzenemethanamine (DPSA) containing two phenyl groups exhibited the strongest π–π interaction. Therefore, the thermal decomposition temperature reached 150°C, while its viscosity was only 8.45 mPa·s at 25°C, which is much lower than that of ILs. The absorption enthalpy and entropy change of DPSA absorption reaction were −79.284 kJ/mol and −224 J/mol/K, respectively. These values are more negative than those of SO2 capture reaction with ILs. An objective function was proposed to obtain the optimal absorption and desorption temperature. Furthermore, five cycles of regeneration experiments indicated that DPSA possessed good regeneration ability.

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Absorption and thermodynamic properties of CO₂ by amido-containing anion-functionalized ionic liquids

Abstract: Amido-containing anion-functionalized ionic liquids exhibit high CO2 absorption capacity and low desorption energy.

Cited by 22 publications

References 35 publications

CO₂ Capture in Biocompatible Amino Acid Ionic Liquids: Exploring the Reaction Mechanisms for Bimolecular Absorption Processes

CO₂ Capture in Biocompatible Amino Acid Ionic Liquids: Exploring the Reaction Mechanisms for Bimolecular Absorption Processes

Hydrophobic Functional Deep Eutectic Solvents Used for Efficient and Reversible Capture of CO₂

Low viscous aminoalkyl‐phenyl‐silane with π–π interaction and its optimal SO₂ capture condition

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Absorption and thermodynamic properties of CO2 by amido-containing anion-functionalized ionic liquids

Abstract: Amido-containing anion-functionalized ionic liquids exhibit high CO2 absorption capacity and low desorption energy.

Cited by 22 publications

References 35 publications

CO2 Capture in Biocompatible Amino Acid Ionic Liquids: Exploring the Reaction Mechanisms for Bimolecular Absorption Processes

CO2 Capture in Biocompatible Amino Acid Ionic Liquids: Exploring the Reaction Mechanisms for Bimolecular Absorption Processes

Hydrophobic Functional Deep Eutectic Solvents Used for Efficient and Reversible Capture of CO2

Low viscous aminoalkyl‐phenyl‐silane with π–π interaction and its optimal SO2 capture condition

Contact Info

Product

Resources

About

Absorption and thermodynamic properties of CO₂ by amido-containing anion-functionalized ionic liquids

CO₂ Capture in Biocompatible Amino Acid Ionic Liquids: Exploring the Reaction Mechanisms for Bimolecular Absorption Processes

CO₂ Capture in Biocompatible Amino Acid Ionic Liquids: Exploring the Reaction Mechanisms for Bimolecular Absorption Processes

Hydrophobic Functional Deep Eutectic Solvents Used for Efficient and Reversible Capture of CO₂

Low viscous aminoalkyl‐phenyl‐silane with π–π interaction and its optimal SO₂ capture condition