Strong Hierarchically Porous Monoliths byPulsed Current Processing of Zeolite PowderAssemblies
2010 (English)In: American Chemical Society, ISSN 1944-8244, Vol. 2, no 3, 732-737 p.Article in journal (Refereed) Published
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.
zeolite, thermal treatment, spark plasma sintering, porous, catalysis
Research subject Materials Chemistry
IdentifiersURN: urn:nbn:se:su:diva-46203DOI: 10.1021/am900760wISI: 000275825700022OAI: oai:DiVA.org:su-46203DiVA: diva2:372058
ProjectsThe Berzelii centre Exselent
FunderKnut and Alice Wallenberg Foundation
authorCount :72010-11-262010-11-232011-01-05Bibliographically approved