A Study on Microwave-Assisted Synthesis of MCM-22 Zeolite

作者：Ling Yun^*; Zheng Yuting; Liu Yueming; Wang Zhendong; Wu Haihong; Wu Peng

来源：Acta Chimica Sinica, 2010, 68(20): 2035-2040.

• MCM-22
• zeolite
• microwave-assisted synthesis
• hydrothermal synthesis

MCM-22 zeolite has been synthesized successfully from hydrogels with microwave (MW) heating method, the process of which was compared with that of conventional hydrothermal synthesis (HTS) The MW-assisted heating showed a significant advantage that it reduced greatly the crystallization time For instance, it led to a fully crystallized MCM-22 within 29 h in contrast to 5 d required by HIS synthesis Microwave-assisted MCM-22 had good quality in phase purity, crystallinity, textual properties and incorporated tetrahedral Al ions as evidence by the characterizations with XRD, SEM, FT-IR, ICP and (27)Al MAS NMR techniques The paramount role of structure-directing agent in the MW-assisted process has been investigated to give a possible mechanism of crystallization Moreover, by adding a small amount of alcohols in the initial gels, the crystallization time was further shortened to 24 h

• 出版日期2010-10-28
• 单位华东师范大学