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ZSM-5 structured catalysts coated with silicalite-1
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
Catalysis Research Unit, Department of Chemical Engineering, University of Cape Town.
Catalysis Research Unit, Department of Chemical Engineering, University of Cape Town.
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2004 (English)In: Recent advances in the science and technology of zeolites and related materials. Part A: proceedings of the 14th International Zeolite Conference, Amsterdam: Elsevier, 2004, p. 677-684Conference paper, Published paper (Refereed)
Abstract [en]

Alumina beads were coated with ZSM-5 films ranging from 150 nm to 2300 nm ill thickness. The ZSM-5 boated alumina beads were Subsequently hydrothermally treated in a silicalite-1 synthesis solution ill two steps Whereupon a dense silicalite-1 film was formed oil top of the ZSM-5 film. The materials were tested with two probe reactions and the reactivity was compared before and after coating with silicalite-1. As expected, the para-xylene (pX) isomerization reactivity showed no change for samples with and without the top layer of silicalite-1 for equal amounts Of zeolite. Surprisingly, the triisopropylbenzene (TIPB) conversion did not decrease after the silicalite-1 film was introduced. As measured by XPS, the aluminum concentration at the Surface of the uncalcined silicalite-1 film surface was lower compared to that at the Surface of the calcined ZSM-5 film. However, after calcination the concentration of aluminum was higher at the silicalite-1 film surface than at the ZSM-5 film Surface. These results Suggest that aluminum migrates from the ZSM-5 film into the silicalite-1 film during calcination and testing which results in all active top layer.

Place, publisher, year, edition, pages
Amsterdam: Elsevier, 2004. p. 677-684
National Category
Chemical Process Engineering
Research subject
Chemical Technology
Identifiers
URN: urn:nbn:se:ltu:diva-28463Local ID: 245925f0-6f84-11db-962b-000ea68e967bISBN: 0-444-51827-4 (print)OAI: oai:DiVA.org:ltu-28463DiVA, id: diva2:1001660
Conference
International Zeolite Conference : 25/04/2004 - 30/04/2004
Note
Godkänd; 2004; 20060922 (bajo)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-04-03Bibliographically approved

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Öhrman, OlovHedlund, JonasSterte, Johan

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