Micromachined nanocrystalline graphite membranes for gas separation
Micromachined nanocrystalline graphite membranes for gas separation
Carbon nanoporous membranes show promising performance for the passive separation and sieving of different gases, for example for helium and hydrogen separation. In this paper, nanocrystalline graphite (or nanographite) has been evaluated as a membrane material for molecular sieving of helium and hydrogen from larger gas constituents. Nanographite of 350 nm thickness was prepared using plasma-enhanced chemical vapour deposition onto fused silica substrates, from which membranes were microfabricated using deep wet etching. Permeability of hydrogen and helium were 1.79 ×10-16 and 1.40×10-16 mol·m·m-2·s-1·Pa-1 at 150 °C respectively, and measured separation was 48 for He/Ne, >135 for H2/CO2 and >1000 for H2/O2. The gas separation properties of the nanographite membranes were tested in the temperature range of 25 to 150 °C, and the permeation measurements show nanographite to be highly selective of helium and hydrogen over all larger gas molecules, including neon.
125-133
Fishlock, S.J.
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Pu, Suan-Hui
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Bhattacharya, G.
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Han, Y.
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McLaughlin, J.
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McBride, J.W.
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Chong, H.M.H.
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O'Shea, S.J.
74a6cb65-ab4d-4e11-9f6f-68e5befe4f53
November 2018
Fishlock, S.J.
b35c425e-91f5-40a1-b3a7-d2939463fb19
Pu, Suan-Hui
8b46b970-56fd-4a4e-8688-28668f648f43
Bhattacharya, G.
9139df2b-4d21-4cd2-89f0-0e7560def4b9
Han, Y.
b646e8d1-a004-4c00-b53d-a1730bb66c08
McLaughlin, J.
616c2664-e1ff-4556-b45b-89c707ebeec8
McBride, J.W.
d9429c29-9361-4747-9ba3-376297cb8770
Chong, H.M.H.
795aa67f-29e5-480f-b1bc-9bd5c0d558e1
O'Shea, S.J.
74a6cb65-ab4d-4e11-9f6f-68e5befe4f53
Fishlock, S.J., Pu, Suan-Hui, Bhattacharya, G., Han, Y., McLaughlin, J., McBride, J.W., Chong, H.M.H. and O'Shea, S.J.
(2018)
Micromachined nanocrystalline graphite membranes for gas separation.
Carbon, 138, .
(doi:10.1016/j.carbon.2018.05.071).
Abstract
Carbon nanoporous membranes show promising performance for the passive separation and sieving of different gases, for example for helium and hydrogen separation. In this paper, nanocrystalline graphite (or nanographite) has been evaluated as a membrane material for molecular sieving of helium and hydrogen from larger gas constituents. Nanographite of 350 nm thickness was prepared using plasma-enhanced chemical vapour deposition onto fused silica substrates, from which membranes were microfabricated using deep wet etching. Permeability of hydrogen and helium were 1.79 ×10-16 and 1.40×10-16 mol·m·m-2·s-1·Pa-1 at 150 °C respectively, and measured separation was 48 for He/Ne, >135 for H2/CO2 and >1000 for H2/O2. The gas separation properties of the nanographite membranes were tested in the temperature range of 25 to 150 °C, and the permeation measurements show nanographite to be highly selective of helium and hydrogen over all larger gas molecules, including neon.
Text
Micromachined nanocrystalline graphite membranes for gas separation Accepted
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Accepted/In Press date: 29 May 2018
e-pub ahead of print date: 4 June 2018
Published date: November 2018
Identifiers
Local EPrints ID: 421522
URI: http://eprints.soton.ac.uk/id/eprint/421522
ISSN: 0008-6223
PURE UUID: 211845dc-611a-4f25-b888-6c28809e2d39
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Date deposited: 14 Jun 2018 16:30
Last modified: 16 Mar 2024 06:44
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Contributors
Author:
S.J. Fishlock
Author:
G. Bhattacharya
Author:
Y. Han
Author:
J. McLaughlin
Author:
H.M.H. Chong
Author:
S.J. O'Shea
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