Using Ionic Liquid Mixtures To Improve the SO<sub>2</sub> Absorption Performance in Flue Gas

Li, Wen; Liu, Ying; Wang, Lihong; Gao, Guang

doi:10.1021/acs.energyfuels.6b02884

Cited by 35 publications

(21 citation statements)

References 35 publications

(61 reference statements)

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“…Thus, the interaction of the (Figure 5b), a typical peak of −COOH in the 1 H NMR spectrum moved from 12.75 to 11.83 ppm, and a new resonance peak was observed at 7.52 ppm after SO 2 absorption. These results suggest that the interaction between [NH 2 emim][OAc] and SO 2 had occurred [25]. That is, the interaction between [OAc] and SO 2 leads to the moving from 12.75 ppm to 11.83, while the reaction of [NH 2 emim] and SO 2 makes the new peak 7.52 ppm appearance.…”

Section: Quantum Chemical Calculation On the Interaction Of Il Mixturmentioning

confidence: 88%

The CO2 Absorption in Flue Gas Using Mixed Ionic Liquids

Liu

et al. 2020

Molecules

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Because of the appealing properties, ionic liquids (ILs) are believed to be promising alternatives for the CO2 absorption in the flue gas. Several ILs, such as [NH2emim][BF4], [C4mim][OAc], and [NH2emim[OAc], have been used to capture CO2 of the simulated flue gas in this work. The structural changes of the ILs before and after absorption were also investigated by quantum chemical methods, FTIR, and NMR technologies. However, the experimental results and theoretical calculation showed that the flue gas component SO2 would significantly weaken the CO2 absorption performance of the ILs. SO2 was more likely to react with the active sites of the ILs than CO2. To improve the absorption capacity, the ionic liquid (IL) mixture [C4mim][OAc]/ [NH2emim][BF4] were employed for the CO2 absorption of the flue gas. It is found that the CO2 absorption capacity would be increased by about 25%, even in the presence of SO2. The calculation results suggested that CO2 could not compete with SO2 for reacting with the IL during the absorption process. Nevertheless, SO2 might be first captured by the [NH2emim][BF4] of the IL mixture, and then the [C4mim][OAc] ionic liquid could absorb more CO2 without the interference of SO2.

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Section: Quantum Chemical Calculation On the Interaction Of Il Mixturmentioning

confidence: 88%

The CO2 Absorption in Flue Gas Using Mixed Ionic Liquids

Liu

et al. 2020

Molecules

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“…This binary IL-IL mixture was selected to be employed in this work in the simulation of the complete extraction process of aromatics from pyrolysis gasoline. The binary IL-IL mixtures have been also applied in other separation processes such as CO2 capture or SO2 absorption [12,13]. In addition, the behavior of IL mixtures have been deeply studied analyzing the experimental data available in literature [14][15][16], while the Conductor-like Screening Model for Real Solvents (COSMO-RS) methodology was successfully employed to predict the mixing behavior of IL mixtures [17].…”

Section: Introductionmentioning

confidence: 99%

COSMO-based/Aspen Plus process simulation of the aromatic extraction from pyrolysis gasoline using the {[4empy][NTf 2 ] + [emim][DCA]} ionic liquid mixture

Larriba

Riva

Navarro

et al. 2018

Separation and Purification Technology

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The ionic liquids (ILs) have been widely studied as potential replacements of conventional solvents in the extraction of aromatic hydrocarbons from alkanes. However, most of the literature is focused in obtaining liquid-liquid equilibria experimental data without studying the complete extraction and IL regeneration process. In this paper, a computer-aided methodology combining COSMO-based molecular simulations and Aspen Plus process simulations has been used to study the extraction process of aromatic hydrocarbons from pyrolysis gasoline employing a binary mixture of 1-ethyl-4-methylpyridinium bis(trifluoromethylsulfonyl)imide ([4empy][NTf2]) and the 1-ethyl-3-methylimidazolium dicyanamide ([emim][DCA]) ILs as solvent. An extensive comparison (more than 600 points) between experimental data and the predictions obtained by the COSMO-based thermodynamic model of liquid-liquid and vapor-liquid equilibria and ILs physical properties was made for validation purposes. Process simulations were performed in three system configurations: with one, two, or three flash distillations in the IL recovery section. The potential advantage of using binary IL-IL mixture as extracting solvent was studied in the whole range of composition. The configuration with three flash distillations and the binary IL-IL mixture with a 75 % of [4empy][NTf2] were selected as the optimal conditions to increase aromatic recovery and purity, improving the separation performance respect to the neat ILs.

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“…[26] However this limestone process requires temperatures in excess of 800 o C to desorb the SO2, and in doing so forms a considerable amount of waste inorganic by-products. [27] As such, one could develop a process using supported amines, tailored for the selective reversible adsorption of SOx and NOx species to pre-scrub flue gas sources before carbon capture occurs. [28] Supported amines have been grouped into four different classes depending on the nature and incorporation method of the amine species.…”

Section: Introductionmentioning

confidence: 99%

Exploring the Acid Gas Sorption Properties of Oxidatively Degraded Supported Amine Sorbents

et al. 2018

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Using Ionic Liquid Mixtures To Improve the SO₂ Absorption Performance in Flue Gas

Cited by 35 publications

References 35 publications

The CO2 Absorption in Flue Gas Using Mixed Ionic Liquids

The CO2 Absorption in Flue Gas Using Mixed Ionic Liquids

COSMO-based/Aspen Plus process simulation of the aromatic extraction from pyrolysis gasoline using the {[4empy][NTf 2 ] + [emim][DCA]} ionic liquid mixture

Exploring the Acid Gas Sorption Properties of Oxidatively Degraded Supported Amine Sorbents

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Using Ionic Liquid Mixtures To Improve the SO2 Absorption Performance in Flue Gas

Cited by 35 publications

References 35 publications

The CO2 Absorption in Flue Gas Using Mixed Ionic Liquids

The CO2 Absorption in Flue Gas Using Mixed Ionic Liquids

COSMO-based/Aspen Plus process simulation of the aromatic extraction from pyrolysis gasoline using the {[4empy][NTf 2 ] + [emim][DCA]} ionic liquid mixture

Exploring the Acid Gas Sorption Properties of Oxidatively Degraded Supported Amine Sorbents

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Using Ionic Liquid Mixtures To Improve the SO₂ Absorption Performance in Flue Gas