Synthesis of zeolite NaA membranes with high performance and high reproducibility on coarse macroporous supports

Li, Huazheng; Wang, Jinqu; Xu, Jing; Meng, Xiangdi; Xu, Bo; Yang, Jianhua; Li, Shiyang; Lu, Jinming; Zhang, Yan; He, Xiaolan; Yin, Daqiang

doi:10.1016/j.memsci.2013.04.030

Cited by 72 publications

(25 citation statements)

References 38 publications

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“…Varying temperature hot dip coating. In the recent literature, there are reports of practical significance with respect to scalable production of zeolite membranes based on a varying temperature hot dip-coating (VTHDC) method, 59,60 which is capable of making seed layers while also plugging defects on the support. In this technique, a tubular support (for example, alumina) is inserted into a solution containing large zeolite seeds at high temperature (177 1C).…”

Section: Tsapatsismentioning

confidence: 99%

Zeolite membranes – a review and comparison with MOFs

et al. 2015

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aThe latest developments in zeolite membranes are reviewed, with an emphasis on the synthesis techniques, including seed assembly and secondary growth methods. This review also discusses the current industrial applications of zeolite membranes, the feasibility of their use in membrane reactors and their hydrothermal stability. Finally, zeolite membranes are compared with metal-organic framework (MOF) membranes and the latest advancements in MOF and mixed matrix membranes are highlighted.

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Section: Tsapatsismentioning

confidence: 99%

Zeolite membranes – a review and comparison with MOFs

et al. 2015

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“…This lower performance includes lower mechanical strength or a lower separation factor due to a higher defect tendency, which also lead to difficulties in the membrane's reproducibility. Some materials suggested to support zeolite membranes are coarse macroporous supports, 90 porous ceramic tubes or discs,…”

Section: 155163164mentioning

confidence: 99%

“…In spite of their superior performance, especially in solvent dehydration processes, the development of LTA zeolite membranes for commercial applications is limited by some parameters, particularly the high costs required for the membrane materials 32,90,158 and the complexity of the preparation of reproducible defect-free membranes.…”

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confidence: 99%

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LTA zeolite membranes: current progress and challenges in pervaporation

et al. 2017

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a Linde Type A (LTA) zeolite-based membranes have demonstrated excellent selectivity in pervaporation due to their unique structural framework and interaction with water. The development of LTA zeolite membranes for commercial application is limited by some parameters, particularly the complexity of the membrane preparation required to produce reproducible defect-free membranes and the high costs required for the membrane materials. In addition, the high content of Al in the zeolite framework makes the LTA zeolite membrane unsuitable for acidic conditions. A number of modification techniques have been proposed to produce a thin, defect-free, and high permselectivity LTA zeolite membrane with high reproducibility. Two major approaches are generally used to produce defect-free zeolite membranes, i.e. modifying either the seeding step or the synthesis process. Since the self-supported zeolite membrane has low mechanical stability, the LTA zeolite membrane is usually synthesized on an inorganic support to give better properties. Zeolite membrane costs can be reduced by several methods such as replacing the support, manufacturing a higher flux zeolite membrane, and fabricating a polymer-zeolite membrane.One should consider, however, that changing the support can dramatically influence and even reverse the obtained separation behavior. Despite various techniques used to prepare dense LTA zeolite membranes, a facile mass production technique with a highly reproducible result remains a significant challenge. To present a clear background for LTA zeolite and its performances in pervaporation, this paper includes a brief discussion on the recent trends related to LTA zeolite membranes. Some topics are discussed, including the features inherent to LTA zeolite, the transport phenomena in zeolite structures, preparation methods of LTA zeolite membranes, and the challenges associated with

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“…It has been reported that the cost of a support occupies about 50-70% of that of a zeolite membrane. 11,23 The cheap macroporous supports are desirable for supporting zeolite membranes because of their low price and permeation resistance. Moreover, the employment of dilute synthesis solution to fabricate zeolite membranes could decrease the consumption of chemicals such as silica and template.…”

Section: Introductionmentioning

confidence: 99%

Ethanol perm‐selective B‐ZSM‐5 zeolite membranes from dilute solutions

Chai

Yang

et al. 2016

AIChE Journal

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in Wiley Online Library (wileyonlinelibrary.com) Boron-substituted MFI (B-ZSM-5) zeolite membranes with high pervaporation (PV) performance were prepared onto seeded inexpensive macroporous a-Al 2 O 3 supports from dilute solution and explored for the separation of ethanol/water mixtures by PV. The effects of several parameters on microstructures and PV performance of the B-ZSM-5 membranes were examined systematically, including the seed size, synthesis temperature, crystallization time, B/Si ratio, H 2 O/SiO 2 ratio and silica source. A continuous and compact B-ZSM-5 membrane was fabricated from solution containing 1 tetraethyl orthosilicate/0.2 tetrapropylammonium hydroxide/0.06 boric acid/600 H 2 O at 448 K for 24 h, showing a separation factor of 55 and a flux of 2.6 kg/m 2 h along with high reproducibility for a 5 wt % ethanol/water mixture at 333 K. It was demonstrated that the incorporation of boron into mobile five (MFI) structure could increase the hydrophobicity of B-ZSM-5 membrane evidenced by the improved contact angle and amount of the adsorbed ethanol, and thus enhance the PV property for ethanol/water mixtures.

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Synthesis of zeolite NaA membranes with high performance and high reproducibility on coarse macroporous supports

Cited by 72 publications

References 38 publications

Zeolite membranes – a review and comparison with MOFs

Zeolite membranes – a review and comparison with MOFs

LTA zeolite membranes: current progress and challenges in pervaporation

Ethanol perm‐selective B‐ZSM‐5 zeolite membranes from dilute solutions

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