Superior selective adsorption of trace CO2 induced by chemical interaction and created ultra-micropores of ionic liquid composites

Zheng, Shasha; Zeng, Shaojuan; Li, Guilin; Yao, Xiaoqian; Li, Zhengchen; Zhang, Xiangping

doi:10.1016/j.cej.2022.138736

Cited by 27 publications

(10 citation statements)

References 69 publications

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“…as mentioned in the literatures, 21 proving the reliable repeatability of this work. DFT Calculations.…”

Section: Characterizations Of Ils Andsupporting

confidence: 79%

“…Subsequently, the refreshed samples were used for a CO 2 absorption experiment to obtain the recyclability of fluid porous IL composites. Figure S3 showed the results of paralleled CO 2 absorption experiments, and the standard relative deviation (RSD) of these three data was 3.46% calculated by the equation of % .25em normalR normalS normalD = ∑ i = 1 i = n false( ∑ i = 1 i = n x i false) 2 n − 1 1 n ∑ i = 1 i = n x i × 100 % as mentioned in the literatures, proving the reliable repeatability of this work.…”

Section: Methodssupporting

confidence: 73%

“…For ENILs and grafted ILs, the IL loading currently does not exceed 90 wt % and is generally less than 80 wt % due to the limitation of the synthesis method. For the supported ILs, theoretically the IL loading could exceed 80 wt %, while the problem of the decreased CO 2 adsorption capacity as the increase of IL loading over 70 wt % for mostly impregnated ILs would appear. ,, The increase of the IL loading to 98 wt % is a significant progress for the porous IL composites. Simultaneously, the CO 2 absorption capacity of AAIL-H20-IL 1 /IL 2 -98% was further improved with the increase of IL loading.…”

Section: Resultsmentioning

confidence: 99%

“…[N 2222 ][Gly] and [HDBU][Im] were prepared via one step method as our previous work. , The fluid porous IL composites with different emulsifiers (H-15, H-18, H-20, H-20RH, and H-2000), different emulsifier contents (0.67, 1.33, 2.00, 2.67, and 3.33 wt %), different shear times (1, 2, and 3 min) and rates (10,000, 15,000, and 20,000 rpm) used in this experiment were prepared via same process based on the Pickering emulsion method . Taking AAIL-H20-IL 1 /IL 2 -98% as an example, 2.0 wt % hydrophobic silica (H-20) was added into mixtures of 50 wt %[Emim][Tf 2 N] and 50 wt % [HDBU][Im] (2 mL) in a plastic container.…”

Section: Methodsmentioning

confidence: 99%

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Novel Fluid Ionic Liquid Composites with Self-Assembled Porosity and Chemical Sites for Facilitating CO₂ Separation

Zheng

Zeng

et al. 2023

ACS Sustainable Chem. Eng.

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Porous ionic liquid (IL) composites, such as impregnated, encapsulated, and porous ILs, are widely used for CO2 capture. However, IL-based adsorbents generally have relatively low IL loading, which cannot fully exploit the unique advantages of ILs. Porous ILs with high IL loading over 90 wt % had high viscosity affecting mass transfer. Therefore, how to simultaneously avoid high viscosity and improve the CO2 absorption rate and IL loadings is of great significant. Herein, a novel fluid IL composite with self-assembled porosity and chemical sites was originally proposed for the CO2 separation. It was prepared by introducing amino-acid IL (AAIL) [N2222][Gly] as the dispersing phase, the mixture of [Emim][Tf2N] (IL1) and [HDBU][Im] (IL2) as the continuous phase, and silica H-20 as the emulsifier, which was named AAIL-H20-IL1/IL2. The results demonstrated that an excellent CO2 capacity of 2.30 mmolCO2/g-sorbent was obtained (313 K/1 bar) with the highest IL loading of 98 wt % among the state-of-the-art value. Meanwhile, micro droplets and porous structures can effectively increase the CO2 absorption rate. The superior CO2 capacity was deduced by the chemisorption of [N2222][Gly] and [HDBU][Im] revealed by in situ FTIR and DFT calculation. In general, this work proposes a pioneer strategy to prepare fluid porous IL composites with ultrahigh IL loading for facilitating CO2 separation.

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“…as mentioned in the literatures, 21 proving the reliable repeatability of this work. DFT Calculations.…”

Section: Characterizations Of Ils Andsupporting

confidence: 79%

Section: Methodssupporting

confidence: 73%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Novel Fluid Ionic Liquid Composites with Self-Assembled Porosity and Chemical Sites for Facilitating CO₂ Separation

Zheng

Zeng

et al. 2023

ACS Sustainable Chem. Eng.

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“…To this end, the preference for green solvents and their widespread use in industry has become the primary goal of modern chemical and process engineering. Ionic liquids (ILs) are of great interest for scientific innovation and industrial applications as green solvent, − extraction and separation, − and catalytic materials − because of their excellent fluid properties such as low vapor pressure, high electrochemical stability, and broad electrochemical window. − …”

Section: Introductionmentioning

confidence: 99%

Norm Indices-Driven Robust QSPR Model for Mining Temperature-Dependent Properties of Ionic Liquids

Liu,

Gu,

et al. 2023

ACS Sustainable Chem. Eng.

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As a green solvent, temperature-dependent properties of ionic liquids (ILs) are important for their application. The large number of ILs makes experimental measurements of temperature-dependent properties nearly impossible to complete, which drives the development of models for filling in the data gaps. In this work, f(T,I)-QSPR models for refractive index (n D ), heat capacity (C p ), surface tension (γ), and thermal conductivity (λ) are developed based on norm indices (I s ) and prescreened extensive data sets. Importantly, leave-one-ion-out cross-validation (LOIO-CV) is employed to assess the stability of the QSPR models, ensuring the robust prediction of ILs with new cations and anions. The superiority of the four models is also confirmed by various evaluation means, including external validation, Y-random analysis, and the comparison with results from the literature. Given the satisfactory accuracy, these models will be useful for the rapid screening of IL properties data for the design of environmentally friendly ILs.

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Selective CO₂ separation through physicochemical absorption by triazole‐functionalized ionic liquid binary absorbents

Sun,

Zeng,

et al. 2024

AIChE Journal

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The selective separation of CO2 from CH4‐containing gases is crucial to produce clean energy gases. In this study, triazole anion‐functionalized ionic liquids (TAFILs) were designed by combining low molecular weight cations with triazole anions containing N electronegative site and further mixed with physical solvents to form physicochemical absorbents. The results indicated that [Cho][Triz]/TMS (80 wt%/20 wt%) not only absorbs 0.125 g CO2/g absorbent equal to that of 30 wt% MEA solution at 40°C and 1 bar, but also has low enthalpy of −35.76 kJ/mol less than half of 30 wt% MEA solution. Simultaneously, a super high CO2/CH4 selectivity of 191.0, higher than most of the reported absorbents, is obtained for [Cho][Triz]/TMS solvents. Such great performance of CO2 separation was attributed to relatively weak chemical and physical interaction between CO2 and TAFIL binary absorbents. This study may provide novel promising ionic liquid absorbents for CO2 capture applications from clean energy gases.

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Superior selective adsorption of trace CO2 induced by chemical interaction and created ultra-micropores of ionic liquid composites

Cited by 27 publications

References 69 publications

Novel Fluid Ionic Liquid Composites with Self-Assembled Porosity and Chemical Sites for Facilitating CO₂ Separation

Novel Fluid Ionic Liquid Composites with Self-Assembled Porosity and Chemical Sites for Facilitating CO₂ Separation

Norm Indices-Driven Robust QSPR Model for Mining Temperature-Dependent Properties of Ionic Liquids

Selective CO₂ separation through physicochemical absorption by triazole‐functionalized ionic liquid binary absorbents

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Superior selective adsorption of trace CO2 induced by chemical interaction and created ultra-micropores of ionic liquid composites

Cited by 27 publications

References 69 publications

Novel Fluid Ionic Liquid Composites with Self-Assembled Porosity and Chemical Sites for Facilitating CO2 Separation

Novel Fluid Ionic Liquid Composites with Self-Assembled Porosity and Chemical Sites for Facilitating CO2 Separation

Norm Indices-Driven Robust QSPR Model for Mining Temperature-Dependent Properties of Ionic Liquids

Selective CO2 separation through physicochemical absorption by triazole‐functionalized ionic liquid binary absorbents

Contact Info

Product

Resources

About

Novel Fluid Ionic Liquid Composites with Self-Assembled Porosity and Chemical Sites for Facilitating CO₂ Separation

Novel Fluid Ionic Liquid Composites with Self-Assembled Porosity and Chemical Sites for Facilitating CO₂ Separation

Selective CO₂ separation through physicochemical absorption by triazole‐functionalized ionic liquid binary absorbents