Synthesis and properties of A-type zeolite membranes by secondary growth method with vacuum seeding

Some key parameters of supports such as porosity, pore shape and size are of great importance for fabrication and performance of zeolite membranes. In this study, we fabricated millimetre-thick, self-standing electrospun ceramic nanofibre mats and employed them as a novel support for zeolite membranes. The nanofibre mats were prepared by electrospinning a halloysite nanotubes/polyvinyl pyrrolidone composite followed by a programmed sintering process. The interwoven nanofibre mats possess up to 80% porosity, narrow pore size distribution, low pore tortuosity and highly interconnected pore structure. Compared with the commercial α-Al 2 O 3 supports prepared by powder compaction and sintering, the halloysite nanotube-based mats (HNMs) show higher flux, better adsorption of zeolite seeds, adhesion of zeolite membranes and lower Al leaching. Four types of zeolite membranes supported on HNMs have been successfully synthesized with either in situ crystallization or a secondary growth method, demonstrating good universality of HNMs for supporting zeolite membranes.

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Synthesis and Performance of Deca- Dodecasil 3 Rhombohedral (DDR)-Type Zeolite Membrane In CO2 Separation– A Review

ASEAN Journal of Chemical Engineering ◽

10.22146/ajche.49708 ◽

2015 ◽

Vol 14 (2) ◽

pp. 48 ◽

Cited By ~ 8

Author(s):

Muhammad Mubashir ◽

Yeong Yin Fong ◽

Lau Kok Keong ◽

Mohd. Azmi Bin Sharrif

Keyword(s):

Secondary Growth ◽

High Energy ◽

Zeolite Membrane ◽

Co2 Separation ◽

Inorganic Membranes ◽

Zeolite Membranes ◽

Type Zeolite ◽

And Performance ◽

Cryogenic Distillation ◽

Growth Methods

CO2 capture technologies including absorption, adsorption, and cryogenic distillation are reported. Conventional technologies for CO2 separation from natural gas have several disadvantages including high cost, high maintenance, occupy more space and consume high energy. Thus, membrane technology is introduced to separate CO2 due to their several advantages over conventional separation techniques. Inorganic membranes exhibit high thermal stability, chemical stability, permeability and selectivity for CO2 and CH4 separation as compared to other type of membranes. Zeolite membranes are potential for CO2 separation due to their characteristics such as, well define the pore structure and molecular sieving property. Among the zeolite membranes, DDR membranes exhibit highest selectivity for CO2 and CH4 separation. DDR membranes are synthesized by conventional hydrothermal and secondary growth methods. These methods required very long synthesis duration (25 days) due to extremely low nucleation and crystal growth rate of DDR zeolite. In this review, synthesis and performance of DDR membrane in CO2 separation from CH4 reported by various researchers are discussed. Challenges and upcoming guidelines related to the synthesis DDR membrane and performance of DDR membrane also included.

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Microwave synthesis of MFI-type zeolite membranes by seeded secondary growth without the use of organic structure directing agents

Microporous and Mesoporous Materials ◽

10.1016/j.micromeso.2008.08.029 ◽

2009 ◽

Vol 118 (1-3) ◽

pp. 224-231 ◽

Cited By ~ 37

Author(s):

Zhong Tang ◽

Seok-Jhin Kim ◽

Xuehong Gu ◽

Junhang Dong

Keyword(s):

Microwave Synthesis ◽

Secondary Growth ◽

Zeolite Membranes ◽

Organic Structure ◽

Type Zeolite ◽

Structure Directing Agents

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Evaluation of effective routes and sizes for permeation through polycrystalline MFI-type zeolite membranes prepared by secondary growth

Journal of Membrane Science ◽

10.1016/j.memsci.2007.02.037 ◽

2007 ◽

Vol 294 (1-2) ◽

pp. 186-195 ◽

Cited By ~ 8

Author(s):

Y. Hasegawa ◽

T. Nagase ◽

Y. Kiyozumi ◽

F. Mizukami

Keyword(s):

Secondary Growth ◽

Zeolite Membranes ◽

Type Zeolite

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Template-free secondary growth synthesis of MFI type zeolite membranes

Microporous and Mesoporous Materials ◽

10.1016/s1387-1811(01)00212-8 ◽

2001 ◽

Vol 43 (3) ◽

pp. 319-327 ◽

Cited By ~ 114

Author(s):

M Pan ◽

Y.S Lin

Keyword(s):

Secondary Growth ◽

Zeolite Membranes ◽

Type Zeolite ◽

Template Free

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The Preparation and Characterization of Zeolite LTA Membrane with Microwave-Assisted Method

Materials Science Forum ◽

10.4028/www.scientific.net/msf.809-810.682 ◽

2014 ◽

Vol 809-810 ◽

pp. 682-688

Author(s):

Li Xia Long ◽

Hui Ling Du ◽

Qun Li An ◽

Xiang Shi ◽

Jun Liu

Keyword(s):

Secondary Growth ◽

Precursor Solution ◽

Zeolite Membrane ◽

Molar Ratio ◽

Microwave Assisted ◽

Growth Method ◽

Type Zeolite ◽

Zeolite Seeds ◽

Zeolite Lta ◽

Controllable Process

A facial method to prepare zeolite LTA membrane via microwave-assisted heating method was reported. The A-type zeolite seeds were prepared by hydrothermal method from a precursor solution composed of A2O3:SiO2:Na2O:H2O with molar ratio of 1:5:40:1000. The optimized process parameters for synthesizing the zeolite seeds are reaction for 10 min, microwave power of 135 W, and the ratio of H2O/Na2O is 25. Zeolite LTA membrane was prepared via secondary growth method by microwave heating on the silicane and zeolite seed modified ceramic supports. The prepared zeolite seeds and membrane were characterized with X-ray diffraction (XRD), Fourier Transform Infrared (FT-IR) and scanning electron microscopy (SEM). The results show that the size of the zeolite seeds are in the range of 100-400 nm with regular cubic morphology, and the zeolite membrane have homogeneous thickness of 1.5 μm and perfect morphology without defects and pinholes. The easy operation and controllable process make the zeolite membrane by this method properly have wide application for the gas sensor and devices.

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