Incorporation of acetate-based ionic liquids into a zeolitic imidazolate framework (ZIF-8) as efficient sorbents for carbon dioxide capture

Mohamedali, Mohanned; Ibrahim, Hussameldin; Henni, Amr

doi:10.1016/j.cej.2017.10.104

Cited by 180 publications

(94 citation statements)

References 39 publications

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“…Because of their tunable physicochemical properties, they have been used in various applications, including synthesis, catalysis, gas storage and separation . Modification of MOFs with ILs can be either by the incorporation of ILs into the framework or coating the external surface area of MOFs with ILs forming a core‐shell‐like structure …”

Section: Introductionmentioning

confidence: 99%

“…Because of their tunable physicochemical properties, they have been used in various applications, including synthesis, [19][20][21] catalysis, [22][23][24] gas storage and separation. [25][26][27] Modification of MOFs with ILs can be either by the incorporation of ILs into the framework [28][29][30][31][32][33][34] or coating the external surface area of MOFs with ILs forming a core-shell-like structure. [35] Although these postsynthesis studies presented very promising results for the performance improvement of the parent MOFs in gas separation, very limited numbers of IL/MOF composites have been reported so far.…”

Section: Introductionmentioning

confidence: 99%

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Improving CO₂ Separation Performance of MIL‐53(Al) by Incorporating 1‐n‐Butyl‐3‐Methylimidazolium Methyl Sulfate

et al. 2019

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1‐n‐Butyl‐3‐methylimidazolium methyl sulfate is incorporated into MIL‐53(Al). Detailed characterization is done by X‐ray fluorescence, Brunauer–Emmett–Teller surface area, scanning electron microscopy, X‐ray diffraction, Fourier‐transform infrared spectroscopy, and thermogravimetric analysis. Results show that ionic liquid (IL) interacts directly with the framework, significantly modifying the electronic environment of MIL‐53(Al). Based on the volumetric gas adsorption measurements, CO2, CH4, and N2 adsorption capacities decreased from 112.0, 46.4, and 19.6 cc (STP) gMIL‐53(Al) −1 to 42.2, 13.0, and 4.3 cc (STP) gMIL‐53(Al) −1 at 5 bar, respectively, upon IL incorporation. Data show that this postsynthesis modification leads to more than two and threefold increase in the ideal selectivity for CO2 over CH4 and N2 separations, respectively, as compared with pristine MIL‐53(Al). The isosteric heat of adsorption (Qst) values show that IL incorporation increases CO2 affinity and decreases CH4 and N2 affinities. Cycling adsorption–desorption measurements show that the composite could be regenerated with almost no decrease in the CO2 adsorption capacity for six cycles and confirm the lack of any significant IL leaching. The results offer MIL‐53(Al) as an excellent platform for the development of a new class of IL/MOF composites with exceptional performance for CO2 separation.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improving CO₂ Separation Performance of MIL‐53(Al) by Incorporating 1‐n‐Butyl‐3‐Methylimidazolium Methyl Sulfate

et al. 2019

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“…Mohamedali et al. impregnated 1‐ n ‐butyl‐3‐methylimidazolium acetate ([BMIM][OAc]) and 1‐ethyl‐3‐methylimidazolium acetate ([EMIM][OAc]) into ZIF‐8 to improve its CO 2 /N 2 selectivity . In a different approach, 1‐(2‐hydroxyethyl)‐3‐methylimidazolium dicyanamide ([HEMIM][DCA]) was deposited onto the external surface of ZIF‐8 to enhance its CO 2 /CH 4 selectivity .…”

Section: Introductionmentioning

confidence: 99%

MIL‐53(Al) as a Versatile Platform for Ionic‐Liquid/MOF Composites to Enhance CO₂ Selectivity over CH₄ and N₂

Kavak

Polat

Kulak

et al. 2019

Chemistry An Asian Journal

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Five different imidazolium-based ionic liquids (ILs) were incorporated into am etal-organic framework (MOF), MIL-53(Al),t oi nvestigate the effect of IL incorporation on the CO 2 separation performance of MIL-53(Al). CO 2 ,C H 4 ,a nd N 2 adsorption isothermso ft he IL/MIL-53(Al) composites and pristine MIL-53(Al)w ere measured to evaluatet he effect of the ILs on the CO 2 /CH 4 and CO 2 /N 2 selectivities of the MOF. Of the composite materials that were tested,[ BMIM][PF 6 ]/ MIL-53(Al) exhibited the largesti ncreasei nC O 2 /CH 4 selectivity,2 .8-times higher than that of pristine MIL-53(Al), whilst [BMIM][MeSO 4 ]/MIL-53(Al) exhibited the largest increase in CO 2 /N 2 selectivity,3 .3-times highert han that of pristine . Ac omparison of the CO 2 separation potentials of the IL/MOF composites showed that the [BMIM][BF 4 ]-and [BMIM][PF 6 ]-incorporated MIL-53(Al) composites both showed enhanced CO 2 /N 2 and CO 2 /CH 4 selectivities at pressures of 1-5 bar compared to composites of CuBTC and ZIF-8w ith the same ILs. These results demonstrate that MIL-53(Al) is av ersatile platform for IL/MOF composites and could help to guide the rational design of new composites for target gas-separation applications.

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“…With the reference of [Bmim][SCN] (Figure ), the TGA analysis demonstrated that initially, the remarkable weight loss of the ionic liquid [Bmim][SCN] can be identified at a temperature within the range of the 300°C. this sudden loss in the weight can be directed to the rupture in the main aromatic ring of the ionic liquid, that is, [Bmim][SCN] . This sudden heavy loss in the weight of the ionic liquid that is, [Bmim][SCN] can be directed to the weak intermolecular interaction, which plays a significant role in the enhancement of the thermal stability of the ionic liquids under harsh thermal conditions …”

Section: Resultsmentioning

confidence: 99%

Experimental investigations on the regeneration of desulfurized 1‐butyl‐3‐methylimidazolium tetrachloroferrate [Bmim][FeCl₄] and 1‐butyl‐3‐methylimidazolium thiocyanate [Bmim][SCN] ionic liquids: A raman spectroscopic study

Ullah

Bustam

Al‐Sehemi

et al. 2019

J Raman Spectroscopy

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The room temperature and task‐specific ionic liquids nowadays have been investigated widely for the removal of sulfur compounds from the natural gas streams. However, the major challenge is the recovery of the desulfurized ionic liquids, which need some significant developments. In this study, two magnetic ionic liquids including the 1‐butyl‐3‐methylimidazolium tetrachloroferrate [Bmim][FeCl4] and 1‐butyl‐3‐methylimidazolium thiocyanate [Bmim][SCN] were investigated for their interaction with the sulfur‐rich compound, that is, dibenzothiophene. The ionic liquids samples were desulfurized and then regenerated with the co‐solvent hexane. The samples were characterized and investigated with the analytical techniques including the Fourier‐transform infrared spectroscopy, ultraviolet–visible absorption analysis, thermogravimetric analysis, and detailed analysis by Raman spectroscopy. The desulfurization results demonstrated that there is no significant influence of the dibenzothiophene molecules on the basic structures of ionic liquids. The regeneration results revealed that the high polarity of the co‐solvent hexane successfully dissolve the dibenzothiophene and efficiently separated from the ionic liquids. Hence, the work present here in this study could be applied for the extractive removal of sulfur compounds from ionic liquids for their regeneration using high polarity co‐solvent hexane.

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Incorporation of acetate-based ionic liquids into a zeolitic imidazolate framework (ZIF-8) as efficient sorbents for carbon dioxide capture

Cited by 180 publications

References 39 publications

Improving CO₂ Separation Performance of MIL‐53(Al) by Incorporating 1‐n‐Butyl‐3‐Methylimidazolium Methyl Sulfate

Improving CO₂ Separation Performance of MIL‐53(Al) by Incorporating 1‐n‐Butyl‐3‐Methylimidazolium Methyl Sulfate

MIL‐53(Al) as a Versatile Platform for Ionic‐Liquid/MOF Composites to Enhance CO₂ Selectivity over CH₄ and N₂

Experimental investigations on the regeneration of desulfurized 1‐butyl‐3‐methylimidazolium tetrachloroferrate [Bmim][FeCl₄] and 1‐butyl‐3‐methylimidazolium thiocyanate [Bmim][SCN] ionic liquids: A raman spectroscopic study

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Incorporation of acetate-based ionic liquids into a zeolitic imidazolate framework (ZIF-8) as efficient sorbents for carbon dioxide capture

Cited by 180 publications

References 39 publications

Improving CO2 Separation Performance of MIL‐53(Al) by Incorporating 1‐n‐Butyl‐3‐Methylimidazolium Methyl Sulfate

Improving CO2 Separation Performance of MIL‐53(Al) by Incorporating 1‐n‐Butyl‐3‐Methylimidazolium Methyl Sulfate

MIL‐53(Al) as a Versatile Platform for Ionic‐Liquid/MOF Composites to Enhance CO2 Selectivity over CH4 and N2

Experimental investigations on the regeneration of desulfurized 1‐butyl‐3‐methylimidazolium tetrachloroferrate [Bmim][FeCl4] and 1‐butyl‐3‐methylimidazolium thiocyanate [Bmim][SCN] ionic liquids: A raman spectroscopic study

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Improving CO₂ Separation Performance of MIL‐53(Al) by Incorporating 1‐n‐Butyl‐3‐Methylimidazolium Methyl Sulfate

Improving CO₂ Separation Performance of MIL‐53(Al) by Incorporating 1‐n‐Butyl‐3‐Methylimidazolium Methyl Sulfate

MIL‐53(Al) as a Versatile Platform for Ionic‐Liquid/MOF Composites to Enhance CO₂ Selectivity over CH₄ and N₂

Experimental investigations on the regeneration of desulfurized 1‐butyl‐3‐methylimidazolium tetrachloroferrate [Bmim][FeCl₄] and 1‐butyl‐3‐methylimidazolium thiocyanate [Bmim][SCN] ionic liquids: A raman spectroscopic study