Promotion effect of cerium in ZSM-22 zeolite on the hydroisomerization of n-hexadecane

Wang, Qiang; Sim, Ley Boon; Xie, Jun; Ye, Songshou; Fu, Jile; Wang, Jiexiang; Zhang, Nuowei; Zheng, Jinbao; Chen, Bing Hui

doi:10.1016/j.micromeso.2023.112720

Cited by 5 publications

(1 citation statement)

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“…Besides, ZSM-5 zeolite with high B/L ratio through desilication treatment can prolong the stability in n-hexane cracking. 36 While post-treatment methods and introduction of heteroatoms 37 have been employed to modify the acid properties of zeolites, few reports have been carried out on a more convenient way to modulate the acidity to improve catalytic performance.…”

Section: Introductionmentioning

confidence: 99%

Diols-Assisted Synthesis of ZSM-22 with Enhanced Catalytic Activity in n-Hexane Cracking

Xu,

He,

Zhu

et al. 2024

Ind. Eng. Chem. Res.

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The investigation of the synthesis of pure-phase ZSM-22 zeolites and their catalytic performance in the n-hexane cracking reaction is of critical significance for industrial production. To enhance the crystallinity of ZSM-22, ethylene glycol was integrated into the synthesis gel, effectively suppressing the formation of quartz and ZSM-5 impurities. Due to the structuredirecting effect of ethylene glycol, the ZSM-22 prepared demonstrates much more mesopores compared to the counterparts without ethylene glycol addition. Furthermore, the acid strength and density of the zeolite increased significantly. These pure-phase ZSM-22 samples exhibited enhanced performance in terms of both conversion efficiency and ethylene selectivity during n-hexane cracking, which is associated with the increased abundance of acid sites and a higher ratio of strong to weak acids. These findings highlight the beneficial effects of ethylene glycol modification on the regulation of crystal growth and the enhancement of catalytic performance in ZSM-22 catalysts.

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Section: Introductionmentioning

confidence: 99%