1. Synthesis of hierarchical ZSM-5 nano-aggregated microspheres for application in enhancing the stability of n-hexane aromatization.
- Author
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Wang, Jinshan, Liu, Cun, Zhu, Peng, Liu, Haiou, Zhang, Xiongfu, Zhang, Yuan, Liu, Junxia, Zhang, Liang, and Zhang, Wei
- Subjects
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MICROSPHERES , *AROMATIZATION , *MESOPORES , *ZEOLITES , *CRYSTALLIZATION , *ALKALINITY , *ZEOLITE catalysts - Abstract
Incorporating mesopores into ZSM-5 zeolite to form a hierarchical structure has been regarded as an important approach to enhance the diffusivity and catalyst lifetime for light alkane aromatization. Herein, hierarchical ZSM-5 nano-aggregated microspheres were simply and directly synthesized and characterized using TPAOH as a single template without any mesoporous templates or zeolite seeds. The size of the ZSM-5 microspheres and the distribution of mesopores could be regulated by controlling the alkalinity of the synthesis gel. A possible self-assembly mechanism was proposed based on tracing the formation process of ZSM-5 microspheres with crystallization time. The ZSM-5 microspheres modified with Zn were applied in n-hexane aromatization and exhibited better catalytic stability than conventional mono-dispensed microporous ZSM-5 due to the existence of accessible mesopores. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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