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ZSM-5 structured catalysts coated with silicalite-1
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Industriell miljö- och processteknik.
Catalysis Research Unit, Department of Chemical Engineering, University of Cape Town.
Catalysis Research Unit, Department of Chemical Engineering, University of Cape Town.
Vise andre og tillknytning
2004 (engelsk)Inngår i: Recent advances in the science and technology of zeolites and related materials. Part A: proceedings of the 14th International Zeolite Conference, Amsterdam: Elsevier, 2004, s. 677-684Konferansepaper, Publicerat paper (Fagfellevurdert)
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.

sted, utgiver, år, opplag, sider
Amsterdam: Elsevier, 2004. s. 677-684
HSV kategori
Forskningsprogram
Kemisk teknologi
Identifikatorer
URN: urn:nbn:se:ltu:diva-28463Lokal ID: 245925f0-6f84-11db-962b-000ea68e967bISBN: 0-444-51827-4 (tryckt)OAI: oai:DiVA.org:ltu-28463DiVA, id: diva2:1001660
Konferanse
International Zeolite Conference : 25/04/2004 - 30/04/2004
Merknad
Godkänd; 2004; 20060922 (bajo)Tilgjengelig fra: 2016-09-30 Laget: 2016-09-30 Sist oppdatert: 2018-04-03bibliografisk kontrollert

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Öhrman, OlovHedlund, JonasSterte, Johan

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Totalt: 76 treff
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