Improved Ti-silicate umbite membranes for the separation of H-2
authors Sebastian, V; Lin, Z; Rocha, J; Tellez, C; Santamaria, J; Coronas, J
nationality International
journal JOURNAL OF MEMBRANE SCIENCE
author keywords umbite; titanosilicate; zeolite; zeolite membrane; hydrogen separation
keywords TITANOSILICATE UMBITE; HYDROGEN-PRODUCTION; STAINLESS-STEEL; ADSORPTION; FLUX; GAS
abstract Microporous titanosilicate (K2TiSi3O9 center dot H2O) with an umbite structure has been reproducibly prepared as 5-mu m-thick continuous membranes on asymmetric TiO2 tubular supports by seeded hydrothermal synthesis. These membranes were able to separate H-2 from N-2 with good selectivity even in the presence of moisture, unlike other microporous zeolitic hydrophilic membranes where capillary condensation strongly hinders gas permeation. The average H-2/N-2 separation selectivity calculated for five Ti-umbite membranes obtained in the same synthesis conditions (200 degrees C, 48 h) was 45.2 +/- 3.8 (together with an average H-2 permeance of 4.6 +/- 11.1 x 10(-9) mol/(m(2) s Pa). (c) 2008 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 0376-7388
year published 2008
volume 323
issue 1
beginning page 207
ending page 212
digital object identifier (doi) 10.1016/j.memsci.2008.06.033
web of science category Engineering, Chemical; Polymer Science
subject category Engineering; Polymer Science
unique article identifier WOS:000258904600026
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journal analysis (jcr 2019):
journal impact factor 7.183
5 year journal impact factor 7.158
category normalized journal impact factor percentile 95.274
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