Abstract

Hydrothermal synthesis of ZSM-5 zeolites with different Si/Al ratios was conducted by using a microwave-assisted heating method. Their characteristics, such as morphology, porosity, acidity, and the catalytic performance for the cracking reaction of military jet fuel JP-8, were compared with ZSM-5 zeolites obtained via a conventional heating synthesis method. The microwave-assisted heating method contributed to bigger crystal sizes of the ZSM-5 zeolite as well as broader mesopore size distribution in the zeolite crystal with the same Si/Al ratio. Acidity analysis revealed ZSM-5 zeolites with similar acid properties could be produced with both heating methods. As the different heating methods attributed to different crystal sizes and roughness of the synthesized ZSM-5 zeolite, which are influenced by the fast crystal growth and consumption of silicon and aluminum precursor during the hydrothermal synthesis, different petroleum gas yields, and paraffinic product selectivity were observed from the ZSM-5 zeolite produced via microwave-assisted heating method. • Microwave-assisted heating method for hydrothermal synthesis (MH) of ZSM-5 zeolites were investigated. • MH method exhibited the same acidic properties but bigger and fairer surface of crystal due to fast crystallization. • Catalytic cracking reaction of military jet fuel was firstly explored with the ZSM-5 catalyst synthesized from MH method.

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