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Meso-Porous Alumina Capillary Tube as a Support for High-Temperature Gas Separation Membranes by Novel Pulse Sequential Anodic Oxidation Technique

Published online by Cambridge University Press:  03 March 2011

Takeshi Inada ,
Naoki Uno ,
Takeharu Kato  and
Yuji Iwamoto
Takeshi Inada*
Affiliation:
Japan Fine Ceramics Center, Hydrogen Separation Membrane Project Division,Nagoya 456-8587, Japan
Naoki Uno
Affiliation:
Japan Fine Ceramics Center, Hydrogen Separation Membrane Project Division,Nagoya 456-8587, Japan
Takeharu Kato
Affiliation:
Japan Fine Ceramics Center, Hydrogen Separation Membrane Project Division,Nagoya 456-8587, Japan
Yuji Iwamoto
Affiliation:
Japan Fine Ceramics Center, Hydrogen Separation Membrane Project Division,Nagoya 456-8587, Japan
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

A meso-porous anodic alumina capillary tube (MAAC) having highly oriented radial meso-pore channels with a minimum diameter of 3 nm has been successfully synthesized using a novel pulse sequential anodic oxidation technique at 100 Hz of pulse frequency. A value resulting in a high channel-pore formation rate at 1 V of the pulse sequential voltage was determined to be the optimum pulse frequency for the anodization. Transmission electron microscopy observation and N2 sorption analysis revealed that controlling the minimum pore channel diameter at 3 nm was possible by the voltage of 1 V. The gas permeance according to Knudsen’s diffusion mechanism was demonstrated at 500 °C, by evaluating gas permeation properties through the meso-porous anodic alumina capillary tube with radial meso-pore channels with minimum diameter of 3 nm, achieving hydrogen permeance of 1.8 × 10−6 mol/m2 s Pa.

Keywords

CeramicElectrochemical synthesisMicrostructure
Type
Articles
Information
Journal of Materials Research , Volume 20 , Issue 1 , January 2005 , pp. 114 - 120
Copyright
Copyright © Materials Research Society 2004

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References

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