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Advances in Materials Science and Engineering
Volume 2014 (2014), Article ID 724248, 20 pages
http://dx.doi.org/10.1155/2014/724248
Review Article

Zeolite Y: Synthesis, Modification, and Properties—A Case Revisited

Brandenburgische Technische Universität Cottbus, Volmerstraße 13, 12489 Berlin, Germany

Received 9 October 2013; Revised 21 January 2014; Accepted 23 January 2014; Published 22 May 2014

Academic Editor: Louis-Philippe Lefebvre

Copyright © 2014 Wolfgang Lutz. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Y zeolites dealuminated by steaming were introduced as fluid-cracking catalysts in the year 1970. Extensive research has been done to develop suitable dealumination techniques, to investigate crystal structure, and to characterize catalytic behaviour. However, the origin of the secondary pore system formed in the zeolite structure during dealumination process remained completely obscure over a period of four decades. Open questions concerned also the existence of extraframework siliceous admixture in addition to extraframework aluminium species which can dramatically change the catalytic properties of these zeolites. This paper gives a review on the synthesis of DAY materials and provides some answers to several open questions.