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Strong Hierarchically Porous Monoliths byPulsed Current Processing of Zeolite PowderAssemblies
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK), Inorganic and Structural Chemistry. (Material chemistry)
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK), Materials Chemistry. (Material chemistry)
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK), Inorganic and Structural Chemistry.
Department of Applied Chemistry and Geosciences, Division of Chemical Engineering, Luleå University of Technology.
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2010 (English)In: American Chemical Society, ISSN 1944-8244, Vol. 2, no 3, 732-737 p.Article in journal (Refereed) Published
Abstract [en]

Binderless hierarchically porous monoliths have been produced from silicalite-1 and ZSM-5 zeolite powders by a rapidand facile powder processing method where the zeolite powders are assembled in a graphite die and subjected simultaneously to acompressive pressure and a pulsed current. Pulsed current processing (PCP) or, as it is commonly called, spark plasma sintering,enables rapid thermal processing of zeolite powder assemblies with heating and cooling rates at 100 °C/minute or more, which resultsin the formation of strong powder bodies without any addition of secondary binders. Nitrogen adsorption measurements show thatit is possible to form strong zeolite monoliths by PCP that maintain between 85 and 95% of the surface area of the as-received silicalite-1and ZSM-5 powders. Line-broadening analysis of X-ray powder diffraction data by the Rietveld method and high-resolution electronmicroscopy showed that the formation of strong interparticle bonds is associated with a local amorphization reaction at the interfacialcontact points between the zeolite particles. The PCP-treated binderless ZSM-5 monoliths display a high selectivity in xylene isomerseparation.

Place, publisher, year, edition, pages
1155 Sixteenth Street N.W., Washington, DC 20036: American Chemical Society , 2010. Vol. 2, no 3, 732-737 p.
Keyword [en]
zeolite, thermal treatment, spark plasma sintering, porous, catalysis
National Category
Inorganic Chemistry
Research subject
Materials Chemistry
Identifiers
URN: urn:nbn:se:su:diva-46203DOI: 10.1021/am900760wISI: 000275825700022OAI: oai:DiVA.org:su-46203DiVA: diva2:372058
Projects
The Berzelii centre Exselent
Funder
Knut and Alice Wallenberg Foundation
Note
authorCount :7Available from: 2010-11-26 Created: 2010-11-23 Last updated: 2011-01-05Bibliographically approved

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