Effect of template concentration and gel dilution on crystallization and particle size of zeolite beta in the absence of alkali cations

• Published in: Microporous and mesoporous materials Vol. 103; no. 1; pp. 94 - 101
• Main Authors: Ding, Lianhui, Zheng, Ying
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Inc 20.06.2007; Elsevier
• Subjects: Chemistry; Colloidal state and disperse state; Exact sciences and technology; General and physical chemistry; Ion-exchange; Nano-sized; Particle size; Porous materials; Surface physical chemistry; Synthesis; Zeolite beta; Zeolites: preparations and properties; Zeolite beta; Nano-sized; Particle size; Synthesis; Dilution; Crystallization; Zeolite; Molecular sieve; Template
• ISSN: 1387-1811; 1873-3093
• DOI: 10.1016/j.micromeso.2007.01.034

Zeolite beta was hydrothermally synthesized in the SiO 2:Al 2O 3:TEAOH:H 2O system without the presence of alkali cations. The effects of TEAOH/SiO 2 molar ratio, and gel dilution on the crystallization kinetics, particle size, and framework SiO 2/Al 2O 3 of synthesized zeolite beta were studied. The as-synthesis and calcinated zeolites were characterized by XRD, TEM, N 2 adsorption, TG/DTA. When TEAOH/SiO 2 molar ratio was increased, the induction time, particle size, and framework SiO 2/Al 2O 3 of zeolites decrease. Concentrated gel favoured the increase of nucleation rate and framework SiO 2/Al 2O 3 of zeolites, and the reduction of particle sizes.