A novel method for fabrication of high-flux zeolite membranes on supports with arbitrary geometry

Yu, Liang; Holmgren, Allan; Hedlund, Jonas

doi:10.1039/c9ta00789j

Cited by 28 publications

(10 citation statements)

References 37 publications

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“…To solve this problem, 1 H ,1 H ,2 H ,2 H -perfluorodecyltriethoxysilane and poly(dimethylamine- co -epichlorohydrin- co -ethylenediamine) (ATC-4150) were added as the hydrophobization agent and cationic polymer, respectively. Via the electrostatic force, negatively charged seed crystals were easily adsorbed onto the cationic polymer; meanwhile, since the hydrophilic surface was covered by the hydrophobization agent and turned to be hydrophobic, the precursor invasion was greatly inhibited and a homogeneous seed distribution was approached ( Yu et al., 2019b ).…”

Section: Synthesis Of Zeolite Membranesmentioning

confidence: 99%

“…To enhance CO 2 adsorption, capping agents can be added to cover the hydroxyl groups. Integration with another hydrophobic zeolite is also an option ( Rehman et al., 2019 ; Yu et al., 2019b ; Wang et al., 2021 ). Moreover, complete elimination of OSDAs benefits CO 2 transport by reducing the hydrophilic residues within the membrane structure ( Jeong et al., 2021 ).…”

Section: Structure and Surface Properties Of Zeolite Membranesmentioning

confidence: 99%

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Zeolite-based catalytic membrane reactors for thermo-catalytic conversion of CO2

Gao¹,

Kawi²

2022

iScience

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Section: Synthesis Of Zeolite Membranesmentioning

confidence: 99%

Section: Structure and Surface Properties Of Zeolite Membranesmentioning

confidence: 99%

Zeolite-based catalytic membrane reactors for thermo-catalytic conversion of CO2

Gao¹,

Kawi²

2022

iScience

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“…The highest CO 2 permeance, together with good CO 2 /CH 4 selectivity, was achieved by Yu et al [75] They adopted a delicate substrate-hydrophobization treatment method to prevent the infiltration of zeolite membranes through substrate pores. The rough procedures are shown in Figure 6.…”

Section: Cha (High-silica)mentioning

confidence: 99%

Small-Pore Zeolite Membranes: A Review of Gas Separation Applications and Membrane Preparation

2022

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There have been significant advancements in small-pore zeolite membranes in recent years. With pore size closely related to many energy- or environment-related gas molecules, small-pore zeolite membranes have demonstrated great potential for the separation of some interested gas pairs, such as CO2/CH4, CO2/N2 and N2/CH4. Small-pore zeolite membranes share some characteristics but also have distinctive differences depending on their framework, structure and zeolite chemistry. Through this mini review, the separation performance of different types of zeolite membranes with respect to interested gas pairs will be compared. We aim to give readers an idea of membrane separation status. A few representative synthesis conditions are arbitrarily chosen and summarized, along with the corresponding separation performance. This review can be used as a quick reference with respect to the influence of synthesis conditions on membrane quality. At the end, some general findings and perspectives will be discussed.

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“…To achieve ultrathin (i.e., submicron in thickness) zeolite membrane is very challenging, evidenced by longtime endeavors from numerous scientists and engineers [11][12][13][14][15][16][17]. Currently developed synthesis methods for MFI thin films are categorized in the following: (1) controlled crystallization by additives such as fluoride ion and organic modifier.…”

Section: Introductionmentioning

confidence: 99%

“…(2) Support modifications by void plugging. Support pretreatments are sophisticated, requiring careful impregnation of extra substances into support voids [13,14]. (3) Seeding with zeolite nanosheets.…”

Section: Introductionmentioning

confidence: 99%

Surface-gel-conversion synthesis of submicron-thick MFI zeolite membranes to expedite shape-selective separation of hexane isomers

et al. 2020

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Ultrathin zeolite membranes are of paramount importance in accelerating gas transport during membrane separation, and lowering down their membrane thicknesses to submicron scale is deemed to be very challenging. Herein, we develop an advanced approach of surface gel conversion for synthesis of submicron-thick pure silica MFI (silicalite-1) zeolite membranes. Viscous gel is prepared by finely adjusting the precursor composition, enabling its reduced wettability. The unfavorable wetting of the support surface can effectively prevent gel penetration into alumina support voids. Aided by the seeds, the surface gel is directly and fully crystallized into an MFI zeolite membrane with minimal water steam. A membrane with a thickness of 500 nm is successfully acquired and it is free of visible cracks. Additionally, the as-synthesized membranes exhibit rapid and selective separation of hexane isomers by virtue of unprecedentedly high n-hexane permeance of 24.5×10 −7 mol m −2 s −1 Pa −1 and impressive separation factors of 13.3-22.6 for n-hexane over its isomers. This developed approach is of practical interest for sustainable synthesis of high-quality zeolite membranes.

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A novel method for fabrication of high-flux zeolite membranes on supports with arbitrary geometry

Abstract: A new widely applicable masking method, relying on rendering the support hydrophobic and thereby protected from the synthesis mixture, was developed for the preparation of zeolite membranes on supports with arbitrary geometries.

Cited by 28 publications

References 37 publications

Zeolite-based catalytic membrane reactors for thermo-catalytic conversion of CO2

Zeolite-based catalytic membrane reactors for thermo-catalytic conversion of CO2

Small-Pore Zeolite Membranes: A Review of Gas Separation Applications and Membrane Preparation

Surface-gel-conversion synthesis of submicron-thick MFI zeolite membranes to expedite shape-selective separation of hexane isomers

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