文献类型：期刊文献

英文题名：Efficient ethylbenzene production from CO2 and benzene in a single-bed reactor

作者：Guan, Yingjie[1];Zhuang, Jianguo[1];Wang, Tianyun[1];Zhang, Peng[1];Yan, Siyan[1];Pu, Jinglong[1];Yu, Jisheng[1];Zhu, Xuedong[1];Yang, Fan[2]

机构：[1]East China Univ Sci & Technol, Engn Res Ctr Large Scale Reactor Engn & Technol, Minist Educ, Shanghai 200237, Peoples R China;[2]Sinopec Shanghai Res Inst Petrochem Technol Co Ltd, State Key Lab Green Chem Engn & Ind Catalysis, Shanghai 201208, Peoples R China

年份：2025

卷号：381

外文期刊名：FUEL

收录：;EI(收录号：20244117159483);WOS:【SCI-EXPANDED(收录号:WOS:001332942200001)】；

基金：The authors are grateful for the financial support from the National Natural Science Foundation of China (21776076) and the Fundamental Research Funds for the Central Universities (JKA01211710) . The au-thors thank the Research Center of Analysis and Test of East China University of Science and Technology for the help on the characteriza-tions. Also, thank eceshi ( www.eceshi.com ) for collecting the data of Mo ssbauer spectroscopy. The authors extend their gratitude to Ms. Wang man from Shiyanjia Lab ( www.shiyanjia.com ) for providing invaluable assistance with the Nitrogen adsorption-desorption analysis.

语种：英文

外文关键词：CO 2 conversion; Ethylbenzene; Bifunctional catalyst; Reaction network; Single-bed

摘要：The selective synthesis of specific value-added aromatic hydrocarbons through CO2 hydrogenation holds significant strategic importance in mitigating energy and climate issues. However, the process of forming ethylated side chains on benzene rings is challenging, and the methods reported are often limited by multi-bed systems. Here, we show the first CO2 hydrogenation in tandem coupling with benzene alkylation to synthesize ethylbenzene over a single-bed system containing ZnFeOx and nano ZSM-5 catalysts. The results indicated that the bifunctional catalyst composed of ZnFeOx with a Zn/Fe ratio of 0.5 and nano-HZSM-5 exhibits excellent catalytic performance under optimized conditions. The benzene conversion reaches 28.0 %, ethylbenzene selectivity is 61.3 % and the conversion of CO2 is remarkably high, achieving 45.0 %. This single-bed system significantly promotes the in-situ utilization of ethylation intermediates. The introduction of zinc promoted the formation of ZnFe2O4 spinel, which increased the number of active sites due to its superior dispersibility and reducibility. Nano-HZSM-5 demonstrated outstanding ethylbenzene selectivity and catalytic stability owing to its unique shape selectivity, moderate acidity, and superior diffusion properties. This study further explores the reaction network and mechanism through GC-MS analysis and various model reactions, elucidating the formation pathways of primary products in detail. This research provides a new strategy for the controllable synthesis of ethylbenzene using CO2 as a C1 source in a single-bed system.