Regulating the Acid Sites Distribution in ZSM-5 Zeolite and Its Catalytic Performance in the Conversion of Methanol to Olefins

被引：7
作者：
Guo, Shujia [1 ,2 ]
Wang, Sen [1 ]
Zhang, Li [1 ,2 ]
Qin, Zhangfeng [1 ]
Wang, Pengfei [1 ]
Dong, Mei [1 ]
Wang, Jianguo [1 ,2 ]
Fan, Weibin [1 ]
机构：
[1] Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE | 2021年 / 42卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Methanol to olefins; ZSM-5; zeolite; Acid sites distribution; Regulation; ALUMINUM DISTRIBUTION; HYDROCARBON POOL; NMR-SPECTROSCOPY; AL DISTRIBUTION; BETA ZEOLITES; FRAMEWORK; INSIGHTS; ATOMS; DEACTIVATION; MECHANISM;
D O I：
10.7503/cjcu20200413
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The catalytic performance and reaction mechanism of ZSM-5 zeolite in the conversion of methanol to olefins (MTO) is closely related to the distribution of acid sites in framework. In this work, it was demonstrated that adding proper content of Na+ ions during synthesis can increase the proportion of acid sites in the intersection cavity of ZSM-5; the concentration of acid sites in the intersection cavity can promote the formation of higher polymethylbenzene (polyMBs) and the propagation of aromatic cycle, forming more ethene. In contrast, in the Na+ ions free synthesis system, more acid sites are distributed in the sinusoidal and straight channels of ZSM-5, which is more encouraging for the alkene cycle and conduces to producing more propene and higher alkenes(C3+).
引用
收藏
页码：227 / 238
页数：12
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