Development of tubular substrates, silica based membranes and membrane modules for hydrogen separation at high temperature

Yoshino, Yūji; Suzuki, Takehiro; Nair, Balagopal N.; Taguchi, Hisatomi; Itoh, Naotsugu

doi:10.1016/j.memsci.2005.05.020

Cited by 150 publications

(81 citation statements)

References 29 publications

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“…Unfortunately, ceramic membrane fabrication, even though commercially available, still remains highly expensive from a technical and economic point of view due to the use of expensive powders such as alumina [8][9][10], zirconia, titania and silica [11,12].…”

Section: Introductionmentioning

confidence: 99%

Study of Ceramic Membrane from Naturally Occurring-Kaolin Clays for Microfiltration Applications

Rekik

Bouaziz

Deratani

et al. 2017

Period. Polytech. Chem. Eng.

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The focus of this work is to assess the quality of porous membranes prepared from naturally occurring kaolin clays and to evaluate the performance of tubular ceramic membranes treating integrated raw effluents from seafood industry. This material has been chosen due to its natural abundance, its non-tox IntroductionWater pollution is one of the most important crises in modern times because water is the most important basis of life. There is much current interest in the application of microfiltration and ultrafiltration membranes in separation procedures because of their potential for the treatment of large quantities of wastewater [1][2][3][4][5]. This is a successful way to solve water pollution crisis and to maintain the environment wellness.The use of ceramic membranes has many advantages such as high thermal and chemical stability, pressure resistance, long lifetime, good resistance to fouling, and ease of cleaning [6][7]. Unfortunately, ceramic membrane fabrication, even though commercially available, still remains highly expensive from a technical and economic point of view due to the use of expensive powders such as alumina [8][9][10], zirconia, titania and silica [11,12].Recently, the development of low cost ceramic membranes based on natural materials such as apatite powder [13], natural raw clay [14][15][16], graphite [17], phosphates [18,19], dolomite, kaolin [20][21][22][23][24] and waste materials such as fly ash [25][26][27][28][29], appeared as an efficient solution to treat waste water at a low cost. The properties of the ceramic membranes are mainly determined by their composition, the pore-former content and the sintering temperature.MF is a membrane process for concentration, purification, and fractionation in diverse fields such as food, textile, pharmacy, chemical, paper, and leather industries. MF is often used to remove particles, microorganisms, and colloidal materials from suspensions [30][31][32].Fouling would reduce productivity and potentially shorten membrane life. To understand the mechanisms of fouling, some researchers proposed various models to analyze and predict the flux decline behavior during filtration of macromolecular solutions, among them the resistance-in-series model. According to this model, the flux decline is due to the combined effects of irreversible membrane fouling which is not easy to remove [33,34] but with reversible fouling, rinsing with clean water can solve the problem. The main factors that influence fouling are the physicochemical properties of the membrane, feeding solution and operating conditions.

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Section: Introductionmentioning

confidence: 99%

Study of Ceramic Membrane from Naturally Occurring-Kaolin Clays for Microfiltration Applications

Rekik

Bouaziz

Deratani

et al. 2017

Period. Polytech. Chem. Eng.

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“…hydrogen and helium from gas mixtures [5,6]. Microporous and dense membranes are suitable for high temperature gas separation [3].…”

Section: Introductionmentioning

confidence: 99%

“…Silica based membranes have been considered in high-purity hydrogen separation [5,6]. These can be achieved by either sol-gel or chemical vapour deposition (CVD) processes as reported in most literatures [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Separation Using Silica-Based Composite Membranes

Kajama

Nwogu

Gobina

2014

AMR

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Silica sol-gel membranes have been developed for moderate temperature (300 °C) separation of hydrogen (H2) from nitrogen (N2), methane (CH4) and argon (Ar) gas molecules. Tubular ceramic support with 15 nm nominal pore diameter and 45% porosity was modified by dip-coating method. Gas permeation characteristics were evaluated. Defect free silica layer over the substrate for hydrogen gas separation was obtained. Hydrogen gas permeate flux of 4.82x10-1mol/sec m2at 1.0 barg feed pressure was obtained. Selectivities of H2over N2, CH4and Ar of 3.07, 2.23 and 3.75 at 300 °C, 200 °C and 300 °C and 0.9 barg were obtained with the silica membranes. The gas permeation and the selectivity performance of the membrane were evaluated.

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“…26) 28) 0.05 M of aluminium-tri-sec-butoxide (ASTB, Aldrich USA) was dissolved in isopropyl alcohol dehydrated (Wako chemical, Japan). Then, boehmite (£-AlOOH) sol was prepared by reacting the 0.1 M alkoxide solution with distilled water at 90°C.…”

Section: Experimental Procedures 21 Synthesis and Evaluation Of Mesopmentioning

confidence: 99%

Hydrothermal stability of hydrogen permselective amorphous silica membrane synthesized by counter diffusion chemical vapor deposition method

Miyajima

Eda

Nair

et al. 2013

J. Ceram. Soc. Japan

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Hydrogen-permselective amorphous silica membranes were synthesized by the counter diffusion chemical vapor deposition (CD-CVD) method using hexamethyldisiloxane as amorphous silica source, and the effect of the mesoporous intermediate layer and the CD-CVD process temperature on the hydrothermal stability of the amorphous silica membranes were studied. A mesoporous amorphous silica intermediate layer with a mean pore size of 20 nm was synthesized on a macroporous ¡-Al 2 O 3 support. Under a hydrothermal condition at 500°C by maintaining steam-nitrogen mixed gas, the mesoporous amorphous silica intermediate layer exhibited an excellent stability, while the conventional sol gel-derived mesoporous £-Al 2 O 3 intermediate layer showed considerable degradation. The improvement in the hydrothermal stability at 500°C of the hydrogen-permselective amorphous silica membrane was successfully achieved by high-temperature synthesis at 700°C of the CD-CVD-derived microporous amorphous silica membrane on the porous ¡-Al 2 O 3 support having the hydrothermally stable amorphous silica intermediate layer. Further study on the microstructure observations and evaluation of activation energies for the hydrogen permeation through the amorphous silica membranes were performed, and the results are shown and discussed from a viewpoint to achieve further hydrothermal stability improvement for further applications to hydrogen production processes.

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Development of tubular substrates, silica based membranes and membrane modules for hydrogen separation at high temperature

Cited by 150 publications

References 29 publications

Study of Ceramic Membrane from Naturally Occurring-Kaolin Clays for Microfiltration Applications

Study of Ceramic Membrane from Naturally Occurring-Kaolin Clays for Microfiltration Applications

Hydrogen Separation Using Silica-Based Composite Membranes

Hydrothermal stability of hydrogen permselective amorphous silica membrane synthesized by counter diffusion chemical vapor deposition method

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