Design and fabrication of zeolite-based microreactors and membrane microseparators

Wan, Yu; Chau, Joseph Lik Hang; Gavriilidis, Asterios; Yeung, King Lun

doi:10.1016/s1387-1811(00)00332-2

Cited by 150 publications

(48 citation statements)

References 44 publications

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“…In addition, new possibilities exist for the directed assembly and growth of complex and functional materials beyond films for separations, such as molecular sensors, mechanically stable dielectrics, and novel reaction-diffusion devices. [231][232][233][234] …”

Section: Discussionmentioning

confidence: 99%

Hierarchical Nanomanufacturing: From Shaped Zeolite Nanoparticles to High‐Performance Separation Membranes

2007

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Despite more than a decade of intense research on the high-resolution selectivity of thin zeolite films as alternatives to energy-intensive industrial separations, membranes consisting of intergrown, oriented zeolite crystals have fallen short of gaining wide commercial application. Factors including poor performance, high cost, and difficulties in scale up have contributed to this, and have also stunted their application in other niche markets. Until recently, rational design of these materials was limited because of the elusive mechanism of zeolite growth, and forced more empirical approaches. New understanding of zeolite growth along with recent advances in the molecular engineering of crystal microstructure and morphology, assembly of crystal monolayers, and synthesis of ordered films constitute a strong foundation for meeting stringent industrial demands in the future. Together with new processing capabilities, such a foundation should make it possible to synthesize commercially viable zeolite membranes through hierarchical approaches. Such advances open exciting prospects beyond the realm of separations for assembly of novel and complex functional materials including molecular sensors, mechanically stable dielectrics, and novel reaction-diffusion devices.

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Section: Discussionmentioning

confidence: 99%

Hierarchical Nanomanufacturing: From Shaped Zeolite Nanoparticles to High‐Performance Separation Membranes

2007

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“…The mechanical stress increases in proportion to membrane area, making large membranes more susceptible to cracks and defects. Hence, an important advantage of microscale zeolite membranes is preventing stress-related failure, by numbering up small individual membrane areas [25].…”

Section: Zeolite Micromembranesmentioning

confidence: 99%

“…Wan et al [25] investigated various fabrication strategies for zeolite films and prepared microstructured silicalite membranes that separated a chamber and channel etched in opposite sides of a silicon chip. Yeung and coworkers [27, 281 fabricated free-standing MFI zeolite membranes by arranging them in a 7 x 7 grid pattern, as shown in Fig.…”

Section: Zeolite Micromembranesmentioning

confidence: 99%

Separation Units

and¹,

Shaw²

2009

Microchemical Engineering in Practice

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“…The surface microstructuring of a substrate plays a significant role in various technologies such as microelectronics [1] and optoelectronics [2]. The textured surfaces are fabricated using one of two general approaches.…”

Section: Introductionmentioning

confidence: 99%

Surface micromachining via solid electrochemical reaction on oxide ion conductors

et al. 2009

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We propose a simple and novel route for the surface microstructuring of tough materials (glassy carbon, SiC, W and Mo) through a solid electrochemical reaction at a microcontact between the oxide ion conductor and target substrate. More specifically, the surface of materials was locally oxidized by an anodic electrochemical reaction with the oxide ion conductor via the microcontact under a dc bias. Since the oxidation products of the targets were gaseous or sublimable, a fine-patterned surface was obtained as a result of the continuous consumption of the oxidation products formed at the microcontact. The success of the proposed method may stimulate such conventional applications of oxide ion conductors.

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Design and fabrication of zeolite-based microreactors and membrane microseparators

Cited by 150 publications

References 44 publications

Hierarchical Nanomanufacturing: From Shaped Zeolite Nanoparticles to High‐Performance Separation Membranes

Hierarchical Nanomanufacturing: From Shaped Zeolite Nanoparticles to High‐Performance Separation Membranes

Separation Units

Surface micromachining via solid electrochemical reaction on oxide ion conductors

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