Synthesis of ZSM-5 zeolite without organic template

摘要

ZSM-5 zeolite was synthesized via a template-free method. The influence of crystallization time was investigated. The obtained samples were characterized by XRD, SEM and FTIR. Results shown that with the ratio of 8 Na_2O : 80 SiO_2 : 2 Al_2O_3 : 2500 H_2O, the crystallization for ZSM-5 began at ca. 9 h. And fine ZSM-5 zeolite (ca. 10-15 μm) could be obtained by crystallizing at 190 °C for 10 h. Further increasing time would lead to the appearance of quartz.