Tuning the adsorption potential. Separation of aromatic hydrocarbons by cobalt and zinc zeolitic imidazolate frameworks

Sámano-Alonso, C.; Hernández-Obregón, J.; Cabrera, Rene; Díaz-Góngora, J.A.I.; Reguera, E.

doi:10.1016/j.colsurfa.2016.06.008

Cited by 9 publications

(5 citation statements)

References 25 publications

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“…XRD patterns of the series of membranes and the phase of Z-Zn are shown in Figure 2-d and evidence the presence crystalline of the Z-Zn, Z-Co, and Z-Zn/Co incorporated into the PEI polymer base [8,26,17]. The crystalline phases of the obtained ZIF materials were identified using the "Match" program and using the Scherrer equation, the particle size was determined, which has the following trends: Z-Zn (1225 Å) > Z-Co (1120 Å) > Z-Zn/Co (879 Å).…”

Section: X-ray Diffraction Analysismentioning

confidence: 94%

Modification of polyetherimide membranes with ZIFs fillers for CO2 separation

Vega

Andrio

Lemus

et al. 2019

Separation and Purification Technology

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Flat hybrid membranes composed of polyetherimide (PEI) as matrix and zeolitic imidazolate frameworks (ZIFs) as fillers at concentrations of 10 and 20 wt % were prepared. Apparent permeability coefficient and apparent diffusivity coefficient of gases (CO2 and N2) for these hybrid membranes (PZIFs) were determined by the "time-lag" method. The experimental conditions used were from 25 °C to 55 °C with pressures of 2, 3 and 5 bar. The PZIFs with fillers of ZIF-8 (PZ-Zn) and ZIF-67 (PZ-Co) showed apparent selectivities ( ( 2 ) ( 2 ) ⁄ ) of 39.6 and 27.5, respectively, higher than the( 2 ) ⁄ of the reference membrane PEI, while the membrane with filler of ZIF-Mix (PZ-Zn/Co) showed the lowest( 2 ) ⁄ selectivity of 10.3 in the membrane series (under conditions of 25 °C and 2 bar). It is proposed that the selectivity of the membrane series can be attributed to two critical factors: the particle size/distribution ratio in the polymer base and sorption of CO2 at local sites of the bimetallic mixture.On the other hand, gas permeation studies (O2, CO2 and CH4, and CO2/CH4 and CO2/C2H4 mixtures), were carried out in the series of PZIFs membranes. Permeability data were obtained by an isostatic method based on a permeation cell connected in series to a gas chromatograph where the rate of permeated gases was analyzed until a stationary state was reached. The complementary characterization techniques were: scanning electron microscopy, thermogravimetric analysis, and powder X-ray diffraction, which support the existence of the amorphous/crystalline phases of the PZIFs.

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Section: X-ray Diffraction Analysismentioning

confidence: 94%

Modification of polyetherimide membranes with ZIFs fillers for CO2 separation

Vega

Andrio

Lemus

et al. 2019

Separation and Purification Technology

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“…Different metal ions are related with the reactivity with imidazoles, coordination geometry, and coordination bond strength . For example, the combination of nIm and Zn ions gives SOD (NOF‐1, ZIF‐65Zn), and also frl (ZIF‐77) structures whereas Co ions form SOD (ZIF‐65Co) and RHO (CoNIm) ZIFs.…”

Section: Topologies and Building Blocksmentioning

confidence: 99%

Compositions and Structures of Zeolitic Imidazolate Frameworks

Noh

Lee

Kim

2018

Israel Journal of Chemistry

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Zeolitic imidazolate frameworks (ZIFs), which are composed of point metal centres and imidazolate linkers, can adopt numerous three-dimensional structures. Their unique structures and porosity properties make ZIFs promising materials especially for gas separation applications. Recently their unusual phase transition properties are getting research attention rapidly. Indeed, all the properties of ZIFs are dependent on their structures. Although some empirical rules are known for discovering new ZIFs, still scientific intuition and trials are necessary to find proper reaction conditions. Also, practical information should be extracted from the accumulate achievements and in turn, applied to further exploration. In this regard, this article analyses the structures, compositions, and porosity of known ZIFs, where the relationship between imidazolates and topologies is described in detail.

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“…Mixing two constituent metal ions could sometimes induce synergistic effects. Consequently, the properties of the obtained MOFs might be superior to those of the parent MOFs, − and therefore this approach could open up opportunities for the development of novel functional materials.…”

Section: Introductionmentioning

confidence: 99%

Flow Microreactor Synthesis of Zeolitic Imidazolate Framework (ZIF)@ZIF Core–Shell Metal–Organic Framework Particles and Their Adsorption Properties

2021

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Metal−organic frameworks (MOFs) with core−shell structures enable to enhance intrinsic properties of constituent MOFs and impart additional functional activities. Although shell thickness is a key factor for regulating the properties of core−shell MOF particles, controlling it has been challenging. The widely used batch reactor synthesis cannot produce core−shell particles with uniform shell thickness because of poor reactant mixing. A microreactor could ensure excellent mixing, and that would allow to control shell thickness. In this study, we synthesized zeolitic imidazolate framework-8 (ZIF-8

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Tuning the adsorption potential. Separation of aromatic hydrocarbons by cobalt and zinc zeolitic imidazolate frameworks

Cited by 9 publications

References 25 publications

Modification of polyetherimide membranes with ZIFs fillers for CO2 separation

Modification of polyetherimide membranes with ZIFs fillers for CO2 separation

Compositions and Structures of Zeolitic Imidazolate Frameworks

Flow Microreactor Synthesis of Zeolitic Imidazolate Framework (ZIF)@ZIF Core–Shell Metal–Organic Framework Particles and Their Adsorption Properties

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