CO2 facilitated aromatization of butenes to benzene, toluene and xylene

IF 5.2 2区化学 Q1 CHEMISTRY, APPLIED

Catalysis Today Pub Date : 2025-03-19 DOI:10.1016/j.cattod.2025.115285

Yu Shao , Yi Ding , Feng Jiao , Dengyun Miao , Shujing Guo , Junfeng Wang , Xiulian Pan

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引用次数: 0

Abstract

The aromatization of mixed C₄ olefins is an important way to convert low value industrial C₄ hydrocarbons by-products into value-added chemicals. Herein, we report CO₂ facilitated aromatization of C₄ olefins to benzene, toluene and xylene (BTX) using metal oxide-zeolite (OXZEO) bifunctional catalysts. An aromatics selectivity of 80.0 % at a CO₂ conversion 10.5 % and butene conversion ∼100 % has been obtained at 500 °C and 1.0 MPa. The proportion of BTX in aromatics reaches as high as 91.0 %. Detailed characterization reveals that the Brønsted acid sites of ZSM-5 are the active sites for aromatization, while the presence of ZnCrAlO_x oxides provides adsorption sites for CO₂ and further reaction with the hydrogen species generated during aromatization. The presence of CO₂ not only enhances the selectivity of aromatics, but also improves the stability of the reaction. ¹³C isotope experiments demonstrate that CO₂ participates in the formation of aromatics. Furthermore, this new strategy is applicable for utilization of different sources of mixed C₄ olefins and C₄-C₅ olefins, in addition to the benefits of utilizing CO₂ towards a sustainable decarbonized society.

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来源期刊

Catalysis Today 化学-工程：化工

CiteScore

11.50

自引率

3.80%

发文量

573

审稿时长

2.9 months

期刊介绍： Catalysis Today focuses on the rapid publication of original invited papers devoted to currently important topics in catalysis and related subjects. The journal only publishes special issues (Proposing a Catalysis Today Special Issue), each of which is supervised by Guest Editors who recruit individual papers and oversee the peer review process. Catalysis Today offers researchers in the field of catalysis in-depth overviews of topical issues. Both fundamental and applied aspects of catalysis are covered. Subjects such as catalysis of immobilized organometallic and biocatalytic systems are welcome. Subjects related to catalysis such as experimental techniques, adsorption, process technology, synthesis, in situ characterization, computational, theoretical modeling, imaging and others are included if there is a clear relationship to catalysis.