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Surface Seeding in ZSM-5 Membrane Preparation

Lai, Re and Gavalas, George R. (1998) Surface Seeding in ZSM-5 Membrane Preparation. Industrial & Engineering Chemistry Research, 37 (11). pp. 4275-4283. ISSN 0888-5885. doi:10.1021/ie980265a.

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ZSM-5 zeolite membranes were prepared by in situ hydrothermal synthesis on macroporous α-alumina tubes coated with silicalite seeds. Seed particles were prepared by hydrothermal synthesis at 95 °C to mean size 0.4 or 2 μm, purified of unconverted reactants, and suspended in a buffered aqueous solution. The support tubes were seeded by immersion in the particle suspension under ultrasonication. Membrane growth on seeded supports was carried out at temperatures 110−150 °C and different reaction times. An external polycrystalline layer gradually grows on top of the support, with siliceous deposits accumulating as deep as 100 μm inside the pores of the support. Thermogravimetric analysis and nitrogen and argon adsorption measurements indicate graduate conversion of deposits from amorphous to crystalline. Pure gas permeation results are presented for membranes prepared using 0.4 and 2 μm seeds under different compositions and temperatures.

Item Type:Article
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Gavalas, George R.0000-0003-1468-6835
Additional Information:© 1998 American Chemical Society. Received for review April 27, 1998. Revised manuscript received August 18, 1998. Accepted August 21, 1998. This study was funded by NSF grant CTS 9504901 and by Chevron Research and Technology Co. Micromeritics Corp. provided a grant for the ASAP 2000 instrument.
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Chevron Research and Technology Co.UNSPECIFIED
Micromeritics Corp.UNSPECIFIED
Issue or Number:11
Record Number:CaltechAUTHORS:20151007-090424153
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Official Citation:Surface Seeding in ZSM-5 Membrane Preparation Re Lai and George R. Gavalas Industrial & Engineering Chemistry Research 1998 37 (11), 4275-4283 DOI: 10.1021/ie980265a
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:60839
Deposited By: George Porter
Deposited On:13 Oct 2015 15:43
Last Modified:10 Nov 2021 22:40

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