Polyvinylamine-loaded metal–organic framework MIL-101 for effective and selective CO2 adsorption under atmospheric or lower pressure

Shin, Subin; Yoo, Dong Kyu; Bae, Yang‐Seop; Jhung, Sung Hwa

doi:10.1016/j.cej.2019.123429

Cited by 59 publications

(14 citation statements)

References 76 publications

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“…PXRD patterns of MIL-101(Cr) and IL/MIL-x were carried out. Figure 1a indicates that the PXRD patterns of MIL-101(Cr) correspond well with their simulated ones, confirming the successful synthesis 28 . Besides, the IL/MIL composites maintain similar diffraction peaks to pristine MIL-101, indicating that the materials retain the framework stability after loading IL.…”

Section: Characterizationsupporting

confidence: 66%

A novel IL/MOF nanocomposite tailored for trace SO2 efficient capture based on synergistic effects

Zhao

Han

et al. 2022

Preprint

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Due to its toxicity and corrosiveness, it is of enormous significance to efficiently capture and recover sulfur dioxide (SO2) from flue gas and natural gas. Herein, a new type of IL/MIL-0.7 composite was precisely designed to meet this challenge, which exhibits a high adsorption capacity for SO2 (13.17 mmol·g-1) at 298 K and 1 bar while excludes almost completely carbon dioxide (CO2) (0.27 mmol·g-1) and nitrogen (N2) (0.07 mmol·g-1). The high IAST selectivity (at least 11925) of IL/MIL-0.7 for SO2/CO2 can be achieved within the whole test pressure range. In addition, the breakthrough experiment also confirmed the excellent performance of the composite for deep removal of 2000 ppm SO2. Furthermore, the IL/MIL-0.7 composites can maintain excellent performance after four adsorption and desorption circulations and the thermostability can up to ~450 K. Therefore, this stable IL@MOF composite has the potential application as an effective adsorbent for SO2 removal from flue gas.

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Section: Characterizationsupporting

confidence: 66%

A novel IL/MOF nanocomposite tailored for trace SO2 efficient capture based on synergistic effects

Zhao

Han

et al. 2022

Preprint

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“…Figure illustrates the adsorption selectivity of MIL-101 and TEPA-MIL-101 with different grafting ratios for a binary gas mixture including 15% CO 2 and 85% N 2 at 298 K, calculated through the IAST method. It should be noted that to compare the CO 2 and N 2 adsorption capacities (and subsequently CO 2 /N 2 selectivity) with literature reported data, the CO 2 /N 2 selectivity is calculated at a pressure of 1 bar. − It is obvious that, TEPA-MIL-101 (40 wt %) showed the highest selectivity (i.e., 220) among other samples at 298 K, as it shows the highest CO 2 and the lowest N 2 adsorption capacity leading to a high CO 2 /N 2 selectivity.…”

Section: Resultsmentioning

confidence: 97%

Strong Influence of Amine Grafting on MIL-101 (Cr) Metal–Organic Framework with Exceptional CO₂/N₂ Selectivity

Pirzadeh

Ghoreyshi

Rohani

et al. 2019

Ind. Eng. Chem. Res.

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Matérial Institut Lavoisier (MIL)-101, one of the metal–organic frameworks containing numerous coordinatively unsaturated sites, as well as high specific surface area, was synthetized under different protocols for CO2 adsorption and separation from N2. To improve its CO2 adsorption capacity, different amounts [10, 25, and 40 wt % of tetraethylenepentamine (TEPA)] were grafted to the parental MIL-101. Results revealed that TEPA-MIL-101 (40 wt %) showed one of the highest CO2 adsorption capacities (i.e., 3.76 mmol g–1 at 298 K at 1 bar) among existing MIL-101 and its modified moieties. This amount was 1.56 times greater than parental MIL-101 (in spite of having superior textural properties), which adsorbed 2.41 mmol g–1 CO2 at the same operational conditions. This can be attributed to the presence of polar functional groups in the porous structure of MIL-101 that enhance the interaction between CO2 active sites on the adsorbent surface. Isosteric heat of adsorption of CO2 and N2 on TEPA-MIL-101 (40 wt %) were 35 and 18 kJ mol–1, respectively, based on the temperature-dependent form of the Freundlich model in the Clausius–Clapeyron equation. Ideal adsorption solution theory (IAST) was used for determination of CO2/N2 selectivity for a binary gas mixture, including 15% CO2 and 85% N2 at 298 K and at 1 bar. TEPA-MIL-101 (40 wt %) showed an exceptional CO2/N2 selectivity of 220. Adsorption kinetics study demonstrated that the Avrami model was the best model for fitting the experimental data, which denotes that more than one pathway exists in CO2 and N2 adsorption.

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“…To explore the adsorption behavior of CO 2 molecules in adsorbents, the Freundlich model was employed to fit the experimental data (Equations and ). [ 19,20 ]

q_{e} = K_{F} {C_{e}}^{1 / n} .

Linear form:

\ln q_{e} = \ln K_{F} + 1 / n \ln C_{e},

where q e is the CO 2 adsorption performance in equilibrium (mg g −1 ), C e is the corresponding pressure (Pa), and K F and 1/ n represent the Freundlich constant and adsorption intensity, respectively.…”

Section: Resultsmentioning

confidence: 99%

Salen–Mg‐doped NH₂–MIL‐101(Cr) for effective CO₂ adsorption under ambient conditions

Lin

Xie

et al. 2020

Applied Organom Chemis

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A novel metal‐doped metal–organic framework (MOF) was developed by incorporating salen–Mg into NH2–MIL‐101(Cr) structure under ambient conditions. The Schiff base complex was successfully prepared by condensing salicylaldehyde with a free amino group and then coordinating metal ions. Such a structure can endow the sample with higher CO2 adsorption performance. At 0°C and 1 bar, the salen–Mg‐modified sample achieves the maximum adsorption capacity of 2.18 mmol g−1 for CO2, which was 5.8% higher than the pristine salen–MOF under the same conditions. Notably, the Freundlich model indicates that the CO2 adsorption process of all samples conforms to reversible adsorption. However, the correlation coefficients (R2) of the Mg‐doped sample are lower than that of the pristine sample. Besides, the CO2/N2 adsorption selectivity and isosteric heat also show a similar trend. These results indicate that the salen–Mg can enhance the interaction between the material and CO2 molecules.

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Polyvinylamine-loaded metal–organic framework MIL-101 for effective and selective CO2 adsorption under atmospheric or lower pressure

Cited by 59 publications

References 76 publications

A novel IL/MOF nanocomposite tailored for trace SO2 efficient capture based on synergistic effects

A novel IL/MOF nanocomposite tailored for trace SO2 efficient capture based on synergistic effects

Strong Influence of Amine Grafting on MIL-101 (Cr) Metal–Organic Framework with Exceptional CO₂/N₂ Selectivity

Salen–Mg‐doped NH₂–MIL‐101(Cr) for effective CO₂ adsorption under ambient conditions

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Polyvinylamine-loaded metal–organic framework MIL-101 for effective and selective CO2 adsorption under atmospheric or lower pressure

Cited by 59 publications

References 76 publications

A novel IL/MOF nanocomposite tailored for trace SO2 efficient capture based on synergistic effects

A novel IL/MOF nanocomposite tailored for trace SO2 efficient capture based on synergistic effects

Strong Influence of Amine Grafting on MIL-101 (Cr) Metal–Organic Framework with Exceptional CO2/N2 Selectivity

Salen–Mg‐doped NH2–MIL‐101(Cr) for effective CO2 adsorption under ambient conditions

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Product

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Strong Influence of Amine Grafting on MIL-101 (Cr) Metal–Organic Framework with Exceptional CO₂/N₂ Selectivity

Salen–Mg‐doped NH₂–MIL‐101(Cr) for effective CO₂ adsorption under ambient conditions