Separation of CO2/CH4 mixtures with the MIL-53(Al) metal–organic framework

Finsy, Vincent; Ma, Lina; Alaerts, Luc; Vos, Dirk De; Baron, Gino V.; Denayer, Joeri

doi:10.1016/j.micromeso.2008.11.007

Cited by 328 publications

(295 citation statements)

References 45 publications

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“…47 It is noteworthy that similar or even higher CO 2 / CH 4 selectivity values have formerly been achieved by a variety of MOFs. 68,[71][72][73][74][75][76][77] In the previous theoretical study, 47 In order to determine the dynamic CO 2 /CH 4 adsorption selectivities of the UiO-66-X compounds, breakthrough experiments have been performed using equimolar mixtures of the two gases at 298 K. The methods for the breakthrough experiments and the corresponding curves (Fig. S16, ESI †) are presented in the ESI.…”

Section: Gas Sorption Propertiesmentioning

confidence: 99%

Enhanced selectivity of CO2 over CH4 in sulphonate-, carboxylate- and iodo-functionalized UiO-66 frameworks

et al. 2013

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aThree new functionalized UiO-66-X (X = -SO 3 H, 1; -CO 2 H, 2; -I; 3) frameworks incorporating BDC-X (BDC: 1,4-benzenedicarboxylate) linkers have been synthesized by a solvothermal method using conventional electric heating. The as-synthesized (AS) as well as the thermally activated compounds were characterized by X-ray powder diffraction (XRPD), diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy, thermogravimetric (TG), and elemental analysis. The occluded H 2 BDC-X molecules can be removed by exchange with polar solvent molecules followed by thermal treatment under vacuum leading to the empty-pore forms of the title compounds. Thermogravimetric analysis (TGA) and temperature-dependent XRPD (TDXRPD) experiments indicate that 1, 2 and 3 are stable up to 260, 340 and 360°C, respectively. The compounds maintain their structural integrity in water, acetic acid and 1 M HCl, as verified by XRPD analysis of the samples recovered after suspending them in the respective liquids. As confirmed by N 2 , CO 2 and CH 4 sorption analyses, all of the thermally activated compounds exhibit significant microporosity (S Langmuir : 769-842 m 2 g −1 ), which are comparable to that of the parent UiO-66 compound. Compared to the unfunctionalized UiO-66 compound, all the three functionalized solids possess higher ideal selectivity in adsorption of CO 2 over CH 4 at 33°C.

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Section: Gas Sorption Propertiesmentioning

confidence: 99%

Enhanced selectivity of CO2 over CH4 in sulphonate-, carboxylate- and iodo-functionalized UiO-66 frameworks

et al. 2013

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“…We demonstrate this methodology by using HTW to produce MIL-53(Al), a benchmark MOF that combines thermal stability with porosity 32 and adsorption selectivity. 33 We combine this with a new strategy for removal of guest molecule in MIL-53(Al) using supercritical EtOH.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of metal–organic frameworks by continuous flow

et al. 2014

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A continuous flow process for the synthesis of a metal-organic framework using only water as the reaction medium and requiring only short residence times is described. This affords a new route to scale-up of materials incorporating many of the principles of green chemistry.The process is demonstrated by the synthesis MIL-53(Al) via continuous flow reaction requiring only 5-6 minutes with a space time yield of 1300 kg m -3 d -1 . We have demonstrated the synthesis of 500 g of MIL-53(Al) using this process, which can be scaled-up further by simply feeding further solutions of metal salt and ligand through the reactor. The product has a higher surface area and a better colour than a commercially produced sample of this MOF.In addition, a new and effective method for the extraction of terephthalic acid from within the pores of MIL-53(Al) using supercritical ethanol has been developed, representing a new methodology for activation and removal of substrates from porous hosts.___________________________________________________________________________

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“…However, much of the NG produced worldwide needs significant treatment since the content of CO 2 , the major impurity of natural gas, can vary according to the source (Iarikov et al, 2011;Finsy et al, 2009;Bae et al, 2008). The presence of CO 2 in raw natural gas streams considerably decreases the energy density (calorific value) of natural gas and also contributes to pipeline and equipment corrosion due to the corrosive properties of carbon dioxide in the presence of water (Ghoufi et al, 2009;Cavenati et al, 2006;Iarikov et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Studies on the adsorption behavior of CO2-CH4 mixtures using activated carbon

Rios

Stragliotto

Peixoto

et al. 2013

Braz. J. Chem. Eng.

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-Separation of CO 2 from CO 2 -CH 4 mixtures is an important issue in natural gas and biogas purification. The design of such separation processes depends on the knowledge of the behavior of multicomponent adsorption, particularly that of CO 2 -CH 4 mixtures. In this study, we present a series of experimental binary equilibrium isotherms for CO 2 -CH 4 mixtures on an activated carbon at 293 K and compare them with predicted values using the Ideal Adsorption Solution Theory (IAST) and the Extended Langmuir (EL) model. Even at concentrations of ca. 20% for all binary isotherms, CO 2 already presents higher adsorbed amounts with respect to CH 4 . A maximum selectivity of around 8.7 was observed for a nearly equimolar mixture at 0.1 MPa. The IAST in conjunction with the Toth equation showed slightly better results than IAST using the Langmuir equation and both showed better results than the EL model.

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Separation of CO2/CH4 mixtures with the MIL-53(Al) metal–organic framework

Cited by 328 publications

References 45 publications

Enhanced selectivity of CO2 over CH4 in sulphonate-, carboxylate- and iodo-functionalized UiO-66 frameworks

Enhanced selectivity of CO2 over CH4 in sulphonate-, carboxylate- and iodo-functionalized UiO-66 frameworks

Synthesis of metal–organic frameworks by continuous flow

Studies on the adsorption behavior of CO2-CH4 mixtures using activated carbon

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