Chemical Research in Chinese Universities ›› 2025, Vol. 41 ›› Issue (3): 601-610.doi: 10.1007/s40242-025-5014-z

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Co-doped Metal-Organic Framework as a Heterogeneous Catalyst for Ethylene Dimerization

NING Yao1, ZHAO Bo1, MIN Wenpeng1,2, LI Changlian1, LIU Pengxiao3, JIA Yan1, LI Xinyuan2, ZHANG Ying1   

  1. 1. College of New Energy and Materials, China University of PetroleumBeijing, Beijing 102249, P. R. China;
    2. Sino Oil King Shine Chemical Co., Ltd., Langfang 065000, P. R. China;
    3. Tarim Oilfield Company of PetroChina, Korla City 841000, P. R. China
  • Received:2025-01-22 Revised:2025-03-14 Online:2025-06-01 Published:2025-05-27
  • Contact: ZHANG Ying,E-mail:Y.Zhang@cup.edu.cn E-mail:Y.Zhang@cup.edu.cn

Abstract: The Co-MOF-5 catalyst was synthesized by substituting Zn2+ ions with Co2+ ions within the Zn4O metal clusters of MOF-5, achieved via direct agitation at room temperature. The removal of solvent molecules that exhibit additional coordination with Co2+ can be accomplished through high-temperature treatment, thereby enabling the catalyst to function effectively in ethylene dimerization reactions. At 10 atm (1 atm=101325 Pa) and 25 °C, with Et2AlCl as a cocatalyst, it showed significant activity and 1-C4 selectivity. At a Co/(Co+Zn) molar ratio of 20%, the oligomerization activity of ethylene was observed to be 5.38×105 g·mol-1·h-1. Additionally, the selectivity for C4 products was recorded at 97.11%, with 1-butene constituting 88.06% of the resultant product. Density functional theory (DFT) calculations corroborated that the ethylene oligomerization process catalyzed by Co-MOF-5 adheres to the Cossee-Arlman mechanism. Co-MOF-5 not only facilitates the dimerization process effectively but also directs the reaction pathway to preferentially yield 1-C4. Consequently, Co-MOF-5 presents significant potential for applications in industrial catalysis and organic synthesis, particularly in processes that necessitate highly selective products. By further optimizing and modifying the structure and reaction conditions of Co-MOF-5, it is anticipated that its catalytic performance can be enhanced, thereby advancing the development and application of ethylene dimerization reaction technologies.

Key words: Metal-organic framework, Ethylene dimerization, Heterogeneous, Catalysis, Density functional theory (DFT)