Microwave-assisted hydrothermal rapid synthesis of capillary MFI-type zeolite–ceramic membranes for pervaporation application

Sebastián, Víctor; Mallada, Reyes; Coronas, Joaquı́n; Julbe, A.; Terpstra, R.A.; Dirrix, Ruud W.J.

doi:10.1016/j.memsci.2010.02.073

Cited by 56 publications

(30 citation statements)

References 26 publications

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“…Figure 2 shows the top view and the cross section of the zeolite layers synthesized with the reaction time. In all cases, "c oriented" MFI layers, with the typical columnar morphology [11,12] exhibiting a good intergrowth were observed. In the seeded hydrothermal synthesis, zeolite crystals are expected to grow from the seed layer and therefore a more diluted synthesis gel is employed, which is expected to avoid homogeneous nucleation in the bulk of the liquid.…”

Section: Resultsmentioning

confidence: 80%

“…Their procedure was further applied to capillary tubes for which 2 h synthesis time were required to obtain a continuous fi lm. The as-prepared membranes were tested in the pervaporation of ethanol/water mixtures, showing high water fl ux 1.5 kg/h m 2 and selectivity, α ETOH/H 2 O = 54 [12] . The mechanism of the formation of b-oriented fi lms onto stainlesssteel substrates by microwave heating has been recently studied by Li et al [13] .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fast microwave synthesis of Pt-MFI zeolite coatings on silicon micromonoliths: application to VOC catalytic combustion

Marin

Adrover

Vega

et al. 2012

Green Processing and Synthesis

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This paper describes the preparation of a ZSM-5 zeolite layer onto conventional Si wafers and Si micromonoliths, by using microwave-assisted seeded hydrothermal synthesis. A homogeneous ZSM-5 zeolite layer up to 680 nm was obtained over the external surface of a Si micromonolith (surface to volume ratio > 300,000 m -1 ) after only 4 min of hydrothermal synthesis at 453 K. As a proof of concept, the catalytic activity of the prepared ZSM-5 coated micromonoliths, after a conventional Pt ion-exchange process, was demonstrated in the combustion of traces of n-hexane (200 ppmV) in air.

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Section: Resultsmentioning

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Fast microwave synthesis of Pt-MFI zeolite coatings on silicon micromonoliths: application to VOC catalytic combustion

Marin

Adrover

Vega

et al. 2012

Green Processing and Synthesis

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“…The process has already been applied to solvent dehydration, separation of dissolved organics from water, and separation of organic mixtures. [4][5][6][7][8][9] Hydrophobic silicone rubber is considered as a potential material for the separation of volatile organic compounds (VOCs) from water. Polydimethylsiloxane (PDMS) has already been used for pervaporation of organics/inorganics mixture.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of Silicalite‐1/PDMS surface sieving pervaporation membrane for separation of ethanol/water mixture

Liu

et al. 2015

J of Applied Polymer Sci

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To improve the pervaporation performance of Silicalite-1/PDMS composite membrane by adding a small amount of Silicalite-1 zeolite, novel Silicalite-1/PDMS surface sieving membranes (SSMs) were prepared by attaching Silicalite-1 particles on the PDMS membrane surface. The obtained membranes and traditional mixed-matrix membranes (MMMs) were characterized by SEM, XRD, TGA, FT-IR, and pervaporation separation of ethanol-water mixture. Effects of Silicalite-1 particles content, feed temperatures, and feed compositions on the separation performance were discussed. From the cross-section view SEM images of SSMs, a two-layer structure was observed. The thickness of the Silicalite-1 layer was about 300 nm to 2 lm. The TGA analysis indicates that the zeolite concentration in 3 wt % SSM is lower than 10 wt % MMMs. In the ethanol/water pervaporation experiment, the separation factor of Silicalite-1/PDMS SSMs increased considerably compared with pure PDMS membrane. When the suspensions concentrations of Silicalite-1 particles reached 3 wt %, the separation factor was about 217% increase over pure PDMS membrane and 52.9% increase over 10 wt % Silicalite-1/PDMS MMMs. As the ethanol concentration in the feed increases, the separation factor of SSMs increases, whereas permeation flux decreases. At the same time, with increasing operating temperature, the permeation flux of SSMs increased. The stability of SSMs at high temperature is better than the traditional MMMs.

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“…Yang et al reported that twin growth in the synthesis of b -oriented MFI fi lms was successfully suppressed by applying microwave irradiation on a b -oriented MFI seed layer, relying on the nucleationrelated bottleneck effect [ 54 ]. The supported zeolite membranes on ceramic capillaries have been synthesized under microwave heating in order to reduce synthesis time, to prevent support dissolution, and to reproducibly obtain a thin defect-free zeolite layer [ 84 ]. A chitosan layer is utilized for controlled fabrication of MFI zeolite fi lms in dilute synthesis solution under microwave irradiation.…”

Section: Microwave Synthesismentioning

confidence: 99%

Zeolite Thin Films and Membranes: From Fundamental to Applications

Wang

Yan

2016

Green Chemistry and Sustainable Technology

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Zeolite fi lms and membranes have extensively been investigated since 1992. Many new preparation methods and concepts have been developed, such as microwave synthesis, intergrowth supporting substances, covalent linker synthesis, inner-side synthesis, fl uoride-mediated synthesis, variable-temperature synthesis, masking technique, counter-diffusion secondary growth, and pore-plugging synthesis. The remarkable progress made in the preparation has stimulated many application researches of zeolite fi lms and membranes, such as dehydration of various organic solvents, organics extraction from organic/water mixtures, separation of organic mixtures, gas separation, oil-water separation, desalination of seawater, membrane reactors, membrane microreactors, low-k materials, corrosion-resistant materials, sensors, fuel cells, and batteries. The recent progress in preparation and applications of zeolite membranes from 2000 has been summarized in this chapter.

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Microwave-assisted hydrothermal rapid synthesis of capillary MFI-type zeolite–ceramic membranes for pervaporation application

Cited by 56 publications

References 26 publications

Fast microwave synthesis of Pt-MFI zeolite coatings on silicon micromonoliths: application to VOC catalytic combustion

Fast microwave synthesis of Pt-MFI zeolite coatings on silicon micromonoliths: application to VOC catalytic combustion

Preparation and characterization of Silicalite‐1/PDMS surface sieving pervaporation membrane for separation of ethanol/water mixture

Zeolite Thin Films and Membranes: From Fundamental to Applications

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