Development of rapid thermal processing of tubular cobalt oxide silica membranes for gas separations

Wang, David K., Diniz da Costa, João C. and Smart, Simon (2014) Development of rapid thermal processing of tubular cobalt oxide silica membranes for gas separations. Journal of Membrane Science, 456 192-201. doi:10.1016/j.memsci.2014.01.014


Author Wang, David K.
Diniz da Costa, João C.
Smart, Simon
Title Development of rapid thermal processing of tubular cobalt oxide silica membranes for gas separations
Journal name Journal of Membrane Science   Check publisher's open access policy
ISSN 0376-7388
1873-3123
Publication date 2014-04-15
Sub-type Article (original research)
DOI 10.1016/j.memsci.2014.01.014
Open Access Status
Volume 456
Start page 192
End page 201
Total pages 10
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2015
Language eng
Subject 1606 Political Science
2500 Materials Science
1303 Specialist Studies in Education
1506 Tourism
Formatted abstract
Highlights
• Scaled up rapid thermal processing (RTP) for thin film silica-derived membranes on tubular supports.
• 6 layers of thin film cobalt oxide silica membranes prepared in less than 12 h.
• Best RTP-membranes based on ethyl silicate 40 precursor and optimized water and nitric acid ratios.
• Best He permeance of 3×10−7 mol m−2 s−1 Pa−1 and He/N2 permselectivity of 69 at 450 °C.

This work shows for the first time that sol–gel derived cobalt oxide silica membranes can be produced on large scale, tubular supports through successful implementation of the rapid thermal processing (RTP) techniques. The combination of fast sol–gel methods and RTP techniques reduced the overall membrane fabrication time from a minimum of 7 days to approximately 12 h. The successful RTP technique was developed by changing the silica precursor from tetraethyl orthosilicate to ethyl silicate 40 and adjusting the nitric acid and water ratios in the sol–gel process. The optimized sol–gel conditions for the best membranes were found to deliver average He permeances of 3×10−7 mol m−2 s−1 Pa−1 and He/N2 permselectivities of 69 at 450 °C. This work has enormous potential for transforming the traditional processing pathways associated with sol–gel derived membranes for both research and commercial separation applications.
Keyword Rapid thermal processing
Sol-gel
Silica membranes
Gas separation
Ethyl silica 40
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2015 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 12 times in Thomson Reuters Web of Science Article | Citations
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