Volume: 4 Issue 3 [March 2021]

Article:Modest Strategy for Oxygen Vacancies Concentration on x/Zn-ZSM-5 Bi-functional Catalyst in the Alkylation of Benzene with Syngas

Author: Naseer Ahmad Safi, Yanchun Li, Junwen Wang, Azharulhaq Kamran, Chuanmin Ding

Volume: Vol 4, Issue 3; March 2021

DOI: North American Academic Research, 4(3)230-243, Mar 2021, https://doi.org/10.5281/zenodo.4647668

Abstract: Alkylation of benzene with syngas was studied over Ceria-Zirconia Solid solution and Zinc modified x/Zn-HZSM-5 catalyst. The catalyst was prepared by co-precipitation and impregnation methods. The experimental results exhibited that the insertion of Zr and Zn contents were excessive oxygen vacancies and increase in the specific surface area. The insertion of Zr and Zn content had the best catalytic performance, the sample CeZr/Zn-HZSM-5 exhibiting 26% benzene and 27% CO conversion, with the high selectivity of toluene and xylene 87%. The catalyst carefully characterized: results showed that the catalytic activity was enhanced with the doping of Zr atoms, which would increase the reducibility of Ce4+ to Ce3+, this event led to generate more oxygen vacancies. Besides, the modification of HZSM-5 by Zn contents, the suppressing side reaction of methanol to olefins by reduction of strong BrØ nsted acid and generate new Lewis acid due to the Zn (OH)+ species. These findings are beneficial for comprehension of the conversion of syngas to intermediate methanol and alkylation of the benzene process.

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