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- Title
Methanol Aromatization over Zn and Ce Modified Hierarchical ZSM-5 Catalysts: Effect of Ce as a Promoter.
- Authors
Wei, Zhenhao; Ji, Yufan; Huang, Yiping; Huang, Jingjing; Huang, Yunguo; Yue, Changhai; Li, Junzhou; Tang, Mingwei; Liu, Yunfang; Liu, Hanfei; Zhu, Hao; Zhu, Kai; Yang, Fan; Zhu, Xuedong
- Abstract
Zinc (Zn) and cerium (Ce) modified hierarchical ZSM-5 (HZ) catalysts were prepared by incipient wetness impregnation, and their catalytic performances in methanol to aromatics reaction were evaluated in a fixed-bed reactor operating at 400°C under 0.1 MPa and WHSV of 1.0 h−1. The structure, acidity, and state of Zn species of the Zn/Ce modified HZ catalysts were investigated via several characterization techniques, including XRD, NH3-TPD, H2-TPR, nitrogen adsorption, and XPS. The results showed that the aromatization activity of 2 wt% Zn-modified HZ (2% Zn/HZ) could be significantly enhanced by loading 0.6 wt% Ce, which was mainly attributed to the increase in surface ZnOH+ species. Moreover, it was found that Ce inhibited pore blockage caused by Zn. Consequently, compared to 2% Zn/HZ, 2% Zn-0.6% Ce/HZ exhibited higher aromatic selectivity and longer catalyst lifetime.
- Subjects
AROMATIZATION; CATALYSTS; CATALYST selectivity; METHANOL; CERIUM
- Publication
Advances in Materials Science & Engineering, 2022, p1
- ISSN
1687-8434
- Publication type
Article
- DOI
10.1155/2022/7408284