Amin Aziznia - Department of Chemical Engineering & Petroleum, Sharif University of Technology
Mohammad Firoozi - Department of Chemical Engineering & Petroleum, Sharif University of Technology
Mohammad Ali Safavi - Research Laboratory of Separation Processes, Iran University of Science & Technology

In the present article, the effect of various parameters on synthesis, crystal size, morphology and hydrothermal stability of zeolite β are discussed. The most important parameter is Si/Al ratio and scrutinized widely. The effect of Si/Al ration in precursor gel on crystal size and crystallinity, effect of hydrothermal treatment on structure and acidity and industrial stability of zeolite β is reviewed. The Presence of organic template molecules and effect of seeding on structure, physical and chemical properties of zeolite β is also mentioned. Results of a new two-stage varying temperature synthesis and supercritical fluid aided crystallization which is published recently to obtain high yield of nanocrystalline zeolite β is also presented.

zeolite beta, zeolite crystal, nucleation