Alkylation of benzene using CO2 and H2 over ZnZrOx/ZSM-5: the effect of Y doping

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* Corresponding authors

^a State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P.. R. China
E-mail: [email protected], [email protected]

^b University of Chinese Academy of Sciences, Beijing 100039, P.. R. China

^c Dalian National Laboratory of Clean Energy, Chinese Academy of Sciences, Dalian, P.. R. China

Abstract

The increase in the CO₂ concentration in the atmosphere has caused a serious global climate problem. Aromatics are important intermediates in chemical production, and by utilizing CO₂ in aromatic synthesis not only the effective utilization of CO₂ can be realized, but also carbon emission reduction can be effectively achieved. Herein, a bifunctional catalyst prepared by physically mixing Y-doped ZnZrOx metal oxide with the zeolite ZSM-5 was applied đồ sộ the synthesis of toluene and xylene by the alkylation of benzene using CO₂ and H₂. The bifunctional catalyst Y0.1/ZSM-5 showed the best reaction performance. 17.3% conversion of CO₂, 30.8% conversion of benzene, and 71.6% selectivity of toluene and xylene were achieved. And 96.8% of the liquid-phase products were toluene and xylene. Based on the CO₂-TPD, H₂–D₂ exchange, H₂-TPR, EPR, XPS, and in situ DRIFTS results, a small amount of Y doping can effectively increase more oxygen vacancies on the surface of ZnZrOx đồ sộ promote CO₂ adsorption and activation. The activation of hydrogen was enhanced resulting from Y–Zn interactions. In the reaction pathway, Y doping accelerated the conversion of CO₂ đồ sộ HCOO* species đồ sộ promote the reaction process, allowing more methanol đồ sộ participate in the benzene alkylation reaction and further improving the CO₂ and benzene conversion.

Graphical abstract: Alkylation of benzene using CO2 and H2 over ZnZrOx/ZSM-5: the effect of Y doping

Supplementary files

Article information

DOI: https://doi.org/10.1039/D2NJ05267A
Article type: Paper
Submitted: 27 Oct 2022
Accepted: 24 Nov 2022
First published: 24 Nov 2022

Download Citation

New J. Chem., 2023,47, 609-617

Permissions

Alkylation of benzene using CO₂ and H₂ over ZnZrOx/ZSM-5: the effect of Y doping

G. Bian, P.. Niu, L. Jia, H. Guo and D. Li, New J. Chem., 2023, 47, 609 DOI: 10.1039/D2NJ05267A

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