Synthesis of borosilicate MFI type zeolite
using different aging techniques
Chem.
Met. Alloys 3 (2010) 12-17
https://doi.org/10.30970/cma3.0111
Maryam
ABRISHAMKAR, Seyed Naser AZIZI, Hossein KAZEMIAN
The isomorphic substitution of boron into ZSM-5
zeolite under static hydrothermal conditions was investigated. The evaluation
of the hydrothermal synthesis of BZSM-5 was done by
treating the synthesis mixture by different aging processes, namely,
ultrasonic, static, stirring, and microwave-assisted aging prior to the
conventional hydrothermal treatment. The
synthetic processes with different techniques of aging prior to the onset of conventional
hydrothermal crystallization were compared with a process without any prior
aging. The obtained results show that ultrasonic and microwave assisted
aging shorten the crystallization time and alter the crystal size and the
morphology of the obtained products. The characteristics of the synthesized
products were determined by FT-IR, XRD and SEM techniques.
Effect of different aging on the crystal
morphology and size of products (a) without aging, (b) with stirring aging for
0.5 h, (c) with static aging for 40 h, (d) with microwave-assisted aging for 0.5 h, and (e) with ultrasonic-assisted aging
for 0.5 h, followed by hydrothermal
synthesis at 180ºC.
Keywords
BZSM-5 / Microwave / Ultrasonic /
Aging / Crystallization time