Journal
CRYSTENGCOMM
Volume 23, Issue 48, Pages 8641-8649Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1ce01067k
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Funding
- Natural Science Foundation of China [22008131]
- Opening Fund of the State Key Laboratory of Heavy Oil Processing [SKLOP202002002]
- Natural Science Foundation of Shandong Province [ZR2019BB052]
- Opening Project of Shandong Eco-chemical Engineering Collaborative Innovation Center [XTCXQN15]
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The study revealed that zeolites with lower framework density and identical CBUs and SBUs can successfully synthesize ZSM-5 in a template-free manner, while zeolites with identical CBUs and SBUs can accelerate the crystallization of ZSM-5.
It is of great significance to clarify the roles that various seeds play in the induced synthesis of target zeolites from a viewpoint of topological structure. Zeolites, including ZSM-5, beta, mordenite, ZSM-35, ZSM-22, SSZ-13, SSZ-24 and analcite, were used as seeds for the template-free synthesis of ZSM-5. It was found that zeolites with lower framework density and identical composite building units (CBUs) and secondary building units (SBUs) could be used as seeds for the successful synthesis of ZSM-5. Zeolites (ZSM-5, beta, mordenite, ZSM-35 and ZSM-22) having identical CBUs and SBUs to ZSM-5 were capable of accelerating the crystallization of ZSM-5, whereas zeolites (SSZ-13 and SSZ-24) lacking identical CBUs and SBUs could act as seeds to synthesize ZSM-5 zeolite only if they possessed lower framework density than ZSM-5. As such, zeolites possessing simultaneously identical CBUs and/or SBUs and low framework density had a strong inductive effect in template-free synthesis of ZSM-5.
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