Synthesis of ZSM-5 at low temperature and atmospheric pressure in a pilot-scale batch reactor

✍ Scribed by Wha Jung Kim; Myung Churl Lee; David T Hayhurst

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 331 KB
• Volume: 26
• Category: Article
• ISSN: 1387-1811
• DOI: 10.1016/s1387-1811(98)00225-x

✦ Synopsis

The synthesis of ZSM-5 was carried out at 100°C and atmospheric pressure in a 30 l batch reactor. The results show that a quality of ZSM-5 can easily be synthesized with a well-developed framework structure within 72 h of reaction. The crystallinity readily reached almost 100% and the yield was well over 70% for samples having various SiO 2 /Al 2 O 3 ratios. As the SiO 2 /Al 2 O 3 ratio decreased, the morphology changed from euhedral to spherulite along with an increase of aggregation. The average BET surface area of the samples was 371 m2 g-1 and nuclear magnetic resonance spectroscopic studies showed a quality of ZSM-5 with the least defect sites in the framework structure.