Rapid capture and efficient removal of low-concentration SO2 in simulated flue gas by hypercrosslinked hollow nanotube ionic polymers

An, Xue-Cong; Li, Zhang-Min; Zhou, Yan; Zhu, Wenshuai; Tao, Duan‐Jian

doi:10.1016/j.cej.2020.124859

Cited by 65 publications

(35 citation statements)

References 31 publications

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“…The schematic of absorption process is shown in Figure S1 in the Supporting Information. The apparatus for determining the solubility of CO in a cuprous‐based ternary DES is very close to that reported in our previous work 10,19 . The device contains two chambers made by 316 L stainless steel.…”

Section: Methodsmentioning

confidence: 77%

Promoted absorption of CO at high temperature by cuprous‐based ternary deep eutectic solvents

Tao

et al. 2020

AIChE Journal

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Achieving efficient dissolution of carbon monoxide (CO) in the solvent is very helpful for the implementation of carbonylation reaction at ambient pressure. However, almost all of common solvents show very low solubilities of CO at high temperature. Herein, a series of cuprous‐based ternary deep eutectic solvent (DES) was prepared by mixing imidazolium hydrochloride with CuCl and ZnCl2. The ternary DES [BimH]Cl‐CuCl‐1.0ZnCl2 exhibited very large CO absorption capacity (0.075 mol mol−1, 1 bar) even at a high temperature (353.2 K), which is superior to all of the reported absorbents. Moreover, the ternary DES [BimH]Cl‐CuCl‐1.0ZnCl2 could further promote the reactive absorption of CO to conduct the aminocarbonylation reaction effortlessly at ambient pressure, and thus the targeted products benzamides were obtained in 70–97 yields. We believe that this finding opens a new way to design advanced solvents for efficient capture of CO at high temperature.

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Section: Methodsmentioning

confidence: 77%

Promoted absorption of CO at high temperature by cuprous‐based ternary deep eutectic solvents

Tao

et al. 2020

AIChE Journal

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“…The measurement of CO and N 2 uptake was carried out on a dual‐chamber volumetric apparatus, which was the same as our previous study (Figure S1). The measurements principle is through the gas content in the gas reservoir subtracting the surplus of the gas content in the equilibrium cell equals the uptake of the IL absorbent 20,21 . Triplicate experiments were examined for each IL for obtaining averaged values.…”

Section: Methodsmentioning

confidence: 99%

“…The measurements principle is through the gas content in the gas reservoir subtracting the surplus of the gas content in the equilibrium cell equals the uptake of the IL absorbent. 20,21 Triplicate experiments were examined for each IL for obtaining averaged values. More details information can be found in the Supporting Information.…”

Section: Gas Solubility Measurementsmentioning

confidence: 99%

Cuprous‐based composite ionic liquids for the selective absorption of CO: Experimental study and thermodynamic analysis

Tao

Gao

et al. 2022

AIChE Journal

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Three cuprous-based composite ionic liquids (ILs) [EimH][OAc]-xCuOAc (x = 0.5, 0.6, 0.7) were prepared and employed for efficient absorption of CO. It is shown that the cuprous composite IL [EimH][OAc]-0.6CuOAc exhibited the largest absorption capacity for CO (0.031 g/g at 293.15 K and 1 bar) and had a record CO/N 2 selectivity of 967, which is better than most of common ILs and solvents reported in the literature. The results of Fourier transform infrared (FTIR) spectra, electrospray ionization mass spectrometry (ESI-MS) analysis, and theoretical calculations reveal that such superior CO capacity mainly resulted from two kinds of chemical interaction between CO and the active anionic species [Cu(OAc) 2 ] À in [EimH][OAc]-0.6CuOAc. Furthermore, a "deactivated IL model" was further proposed to accurately describe the absorption behavior of CO in [EimH][OAc]-0.6CuOAc, in which the thermodynamic parameters including Henry's law constants, reaction equilibrium constants, and absorption enthalpies were estimated by the correlation of the experimental solubilities of CO.

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“…Coal-fired power generation is the main method of coal utilization, and the produced flue gas results in millions of tons of sulfur dioxide (SO 2 ) emissions every year. Consequently, many environmental problems, such as acid rain and photochemical smog, have occurred. , At present, many methods have been used to capture SO 2 , but these methods have many drawbacks. For example, the most widely used lime/limestone desulfurization technology is an irreversible process, which results in the production of large amounts of solid waste (CaSO 4 ) and wastewater. , Due to the high concentration of traditional organic solvent absorption technology, the volatility of the absorbent can result in serious secondary pollution. , Therefore, the development of a new, efficient, and reversible SO 2 capture method is of great significance to the development of a sustainable green chemical industry.…”

Section: Introductionmentioning

confidence: 99%

Molecular Insights into SO₂ Absorption by [EMIM][Cl]-Based Deep Eutectic Solvents

Gui

Dai

et al. 2021

ACS Sustainable Chem. Eng.

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Deep eutectic solvents (DESs) as promising green solvents have been proposed for the removal of SO 2 from fuel gases. In this work, an efficient SO 2 absorption strategy based on three 1-ethyl-3-methylimidazolium chlorine ([EMIM][Cl])-based DESs, that is, [EMIM][Cl]−ethylene glycol, [EMIM][Cl]− triethylene glycol, and [EMIM][Cl]−acetamide DESs, was investigated. A comparison of the predicted absorption efficiency via molecular dynamics (MD) and that obtained from experimental results is used to validate the simulated results.Then, the interaction energy and radial and spatial distribution functions are calculated based on the MD simulation results to provide molecular insights into the separation mechanism. The hydrogen bonding and van der Waals interactions between molecules and SO 2 were investigated by quantum chemical calculations. The results demonstrate that the anion ([Cl] − ) plays a significant role in the absorption process. As a further step, a modeling method for SO 2 absorption and DES recovery based on Aspen Plus is established. Under optimal operating conditions, the SO 2 absorption ratio exceeds 99.6%, and the DES recovery ratio is 99.9%. DESs, as a new type of absorbent, will provide new insights for the sustainable development of the green chemical industry.

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Rapid capture and efficient removal of low-concentration SO2 in simulated flue gas by hypercrosslinked hollow nanotube ionic polymers

Cited by 65 publications

References 31 publications

Promoted absorption of CO at high temperature by cuprous‐based ternary deep eutectic solvents

Promoted absorption of CO at high temperature by cuprous‐based ternary deep eutectic solvents

Cuprous‐based composite ionic liquids for the selective absorption of CO: Experimental study and thermodynamic analysis

Molecular Insights into SO₂ Absorption by [EMIM][Cl]-Based Deep Eutectic Solvents

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Rapid capture and efficient removal of low-concentration SO2 in simulated flue gas by hypercrosslinked hollow nanotube ionic polymers

Cited by 65 publications

References 31 publications

Promoted absorption of CO at high temperature by cuprous‐based ternary deep eutectic solvents

Promoted absorption of CO at high temperature by cuprous‐based ternary deep eutectic solvents

Cuprous‐based composite ionic liquids for the selective absorption of CO: Experimental study and thermodynamic analysis

Molecular Insights into SO2 Absorption by [EMIM][Cl]-Based Deep Eutectic Solvents

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Molecular Insights into SO₂ Absorption by [EMIM][Cl]-Based Deep Eutectic Solvents