Chinese Journal of Catalysis ›› 2025, Vol. 72: 314-322.DOI: 10.1016/S1872-2067(25)64680-8

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Efficient carbon integration of CO2 in propane aromatization over acidic zeolites

Cheng Lia,b, Xudong Fanga,*(), Bin Lia,b, Siyang Yanc, Zhiyang Chena, Leilei Yanga,b, Shaowen Haoa,b, Hongchao Liua, Jiaxu Liuc,*(), Wenliang Zhua,*()   

  1. aNational Engineering Research Center of Lower-Carbon Catalysis Technology, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
    bUniversity of Chinese Academy of Sciences, Beijing 100049, China
    cState Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, School of Chemical Engineering, Dalian University of Technology, Dalian 116012, Liaoning, China
  • Received:2025-01-24 Accepted:2025-03-26 Online:2025-05-18 Published:2025-05-20
  • Contact: *E-mail: xdfang@dicp.ac.cn (X. Fang), liujiaxu@dlut.edu.cn (J. Liu), wlzhu@dicp.ac.cn (W. Zhu).
  • Supported by:
    National Natural Science Foundation of China(22402179);National Natural Science Foundation of China(22472016);National Natural Science Foundation of China(21991094);National Natural Science Foundation of China(21991090);“Transformational Technologies for Clean Energy and Demonstration”, Strategic Priority Research Program of the Chinese Academy of Sciences(XDA21030100);Dalian High Level Talent Innovation Support Program(2017RD07);National Special Support Program for High Level Talents(SQ2019RA2TST0016)

Abstract:

Direct converting carbon dioxide (CO2) and propane (C3H8) into aromatics with high carbon utilization offers a desirable opportunity to simultaneously mitigate CO2 emission and adequately utilize C3H8 in shale gas. Owing to their thermodynamic resistance, converting CO2 and C3H8 respectively remains difficult. Here, we achieve 60.2% aromatics selectivity and 48.8% propane conversion over H-ZSM-5-25 via a zeolite-catalyzing the coupling of CO2 and C3H8. Operando dual-beam FTIR spectroscopy combined with 13C-labeled CO2 tracing experiments revealed that CO2 is directly involved in the generation of aromatics, with its carbon atoms selectively embedded into the aromatic ring, bypassing the reverse water-gas shift pathway. Accordingly, a cooperative aromatization mechanism is proposed. Thereinto, lactones, produced from CO2 and olefins, are proven to be the key intermediate. This work not only provides an opportunity for simultaneous conversion of CO2 and C3H8, but also expends coupling strategy designing of CO2 and alkanes over acidic zeolites.

Key words: CO2 utilization, Propane aromatization, Coupling effect, Acidic zeolites, Lactone