Development of hydrothermally stable sol-gel derived La 2O 3-doped Ga 2O 3-Al 2O 3 composite mesoporous membrane

Md Hasan Zahir; Koji Sato; Yuji Iwamoto

doi:10.1016/j.memsci.2004.09.011

Development of hydrothermally stable sol-gel derived La ₂O ₃-doped Ga ₂O ₃-Al ₂O ₃ composite mesoporous membrane

Md Hasan Zahir, Koji Sato, Yuji Iwamoto

Research output: Contribution to journal › Article › peer-review

39 Scopus citations

Abstract

Mesoporous γ-Al ₂O ₃-based membranes, namely γ-Al ₂O ₃ alone, La ₂O ₃-doped Al ₂O ₃, Ga ₂O ₃-doped Al ₂O ₃ and La ₂O ₃-doped Ga ₂O ₃-Al ₂O ₃, were prepared by the sol-gel method to test their stability in hydrothermal conditions at 500°C. The hydrothermal (up to 75% steam) stability of all fabricated membranes formed on an α-Al ₂O ₃ porous support through dip coating process was characterized by H ₂ gas permeation. The H ₂ gas permeance was drastically increased in 2 h under hydrothermal conditions for all samples except La ₂O ₃-doped Ga ₂O ₃-Al ₂O ₃. Steady-state gas permeance performance and unchanged morphology as well as pore size before and after hydrothermal test revealed that the La ₂O ₃-doped Ga ₂O ₃-Al ₂O ₃ membrane in the composition of La:Ga:Al = 6:30:64 mol% with γ-Al ₂O ₃ phase structure could be withstand during prolonged exposure to high temperature (500°C), especially in the presence of steam. The hydrothermal test indicates that the membrane prepared is viable to be of use as an intermediate layer for fabricating a microporous gas separation membrane.

Original language	English
Pages (from-to)	95-101
Number of pages	7
Journal	Journal of Membrane Science
Volume	247
Issue number	1-2
DOIs	https://doi.org/10.1016/j.memsci.2004.09.011
State	Published - 1 Feb 2005
Externally published	Yes

Bibliographical note

Funding Information:
This work has been supported by New Energy and Industrial Technology Development Organization (NEDO) as a part of the R&D Project on “Highly Efficient Ceramic Membranes for High-Temperature Separation of Hydrogen” promoted by Ministry of Economy, Trade and Industry (METI), Japan. The authors would like to thank Dr. Takeshi Inada for the pore-size distribution measurements.

Keywords

Gas permeance
Hydrothermal stability
Mesoporous membrane
Sol-gel

ASJC Scopus subject areas

Biochemistry
General Materials Science
Physical and Theoretical Chemistry
Filtration and Separation

Access to Document

10.1016/j.memsci.2004.09.011

Cite this

@article{cb42177b424942989de338cfe2bf1e83,

title = "Development of hydrothermally stable sol-gel derived La 2O 3-doped Ga 2O 3-Al 2O 3 composite mesoporous membrane",

abstract = "Mesoporous γ-Al 2O 3-based membranes, namely γ-Al 2O 3 alone, La 2O 3-doped Al 2O 3, Ga 2O 3-doped Al 2O 3 and La 2O 3-doped Ga 2O 3-Al 2O 3, were prepared by the sol-gel method to test their stability in hydrothermal conditions at 500°C. The hydrothermal (up to 75\% steam) stability of all fabricated membranes formed on an α-Al 2O 3 porous support through dip coating process was characterized by H 2 gas permeation. The H 2 gas permeance was drastically increased in 2 h under hydrothermal conditions for all samples except La 2O 3-doped Ga 2O 3-Al 2O 3. Steady-state gas permeance performance and unchanged morphology as well as pore size before and after hydrothermal test revealed that the La 2O 3-doped Ga 2O 3-Al 2O 3 membrane in the composition of La:Ga:Al = 6:30:64 mol\% with γ-Al 2O 3 phase structure could be withstand during prolonged exposure to high temperature (500°C), especially in the presence of steam. The hydrothermal test indicates that the membrane prepared is viable to be of use as an intermediate layer for fabricating a microporous gas separation membrane.",

keywords = "Gas permeance, Hydrothermal stability, Mesoporous membrane, Sol-gel",

author = "Zahir, \{Md Hasan\} and Koji Sato and Yuji Iwamoto",

note = "Funding Information: This work has been supported by New Energy and Industrial Technology Development Organization (NEDO) as a part of the R\&D Project on “Highly Efficient Ceramic Membranes for High-Temperature Separation of Hydrogen” promoted by Ministry of Economy, Trade and Industry (METI), Japan. The authors would like to thank Dr. Takeshi Inada for the pore-size distribution measurements.",

year = "2005",

month = feb,

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doi = "10.1016/j.memsci.2004.09.011",

language = "English",

volume = "247",

pages = "95--101",

journal = "Journal of Membrane Science",

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TY - JOUR

T1 - Development of hydrothermally stable sol-gel derived La 2O 3-doped Ga 2O 3-Al 2O 3 composite mesoporous membrane

AU - Zahir, Md Hasan

AU - Sato, Koji

AU - Iwamoto, Yuji

N1 - Funding Information: This work has been supported by New Energy and Industrial Technology Development Organization (NEDO) as a part of the R&D Project on “Highly Efficient Ceramic Membranes for High-Temperature Separation of Hydrogen” promoted by Ministry of Economy, Trade and Industry (METI), Japan. The authors would like to thank Dr. Takeshi Inada for the pore-size distribution measurements.

PY - 2005/2/1

Y1 - 2005/2/1

N2 - Mesoporous γ-Al 2O 3-based membranes, namely γ-Al 2O 3 alone, La 2O 3-doped Al 2O 3, Ga 2O 3-doped Al 2O 3 and La 2O 3-doped Ga 2O 3-Al 2O 3, were prepared by the sol-gel method to test their stability in hydrothermal conditions at 500°C. The hydrothermal (up to 75% steam) stability of all fabricated membranes formed on an α-Al 2O 3 porous support through dip coating process was characterized by H 2 gas permeation. The H 2 gas permeance was drastically increased in 2 h under hydrothermal conditions for all samples except La 2O 3-doped Ga 2O 3-Al 2O 3. Steady-state gas permeance performance and unchanged morphology as well as pore size before and after hydrothermal test revealed that the La 2O 3-doped Ga 2O 3-Al 2O 3 membrane in the composition of La:Ga:Al = 6:30:64 mol% with γ-Al 2O 3 phase structure could be withstand during prolonged exposure to high temperature (500°C), especially in the presence of steam. The hydrothermal test indicates that the membrane prepared is viable to be of use as an intermediate layer for fabricating a microporous gas separation membrane.

AB - Mesoporous γ-Al 2O 3-based membranes, namely γ-Al 2O 3 alone, La 2O 3-doped Al 2O 3, Ga 2O 3-doped Al 2O 3 and La 2O 3-doped Ga 2O 3-Al 2O 3, were prepared by the sol-gel method to test their stability in hydrothermal conditions at 500°C. The hydrothermal (up to 75% steam) stability of all fabricated membranes formed on an α-Al 2O 3 porous support through dip coating process was characterized by H 2 gas permeation. The H 2 gas permeance was drastically increased in 2 h under hydrothermal conditions for all samples except La 2O 3-doped Ga 2O 3-Al 2O 3. Steady-state gas permeance performance and unchanged morphology as well as pore size before and after hydrothermal test revealed that the La 2O 3-doped Ga 2O 3-Al 2O 3 membrane in the composition of La:Ga:Al = 6:30:64 mol% with γ-Al 2O 3 phase structure could be withstand during prolonged exposure to high temperature (500°C), especially in the presence of steam. The hydrothermal test indicates that the membrane prepared is viable to be of use as an intermediate layer for fabricating a microporous gas separation membrane.

KW - Gas permeance

KW - Hydrothermal stability

KW - Mesoporous membrane

KW - Sol-gel

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