Journal of Energy Chemistry ›› 2023, Vol. 85 ›› Issue (10): 562-569.DOI: 10.1016/j.jechem.2023.07.012

Previous Articles     Next Articles

Ni-catalyzed carbon-carbon bonds cleavage of mixed polyolefin plastics waste

Xiaoqin Sia, Jiali Chena, Zhengwei Wangb, Yue Hu, Zhiwen Rena, Rui Lua, Lu Liub, Jing Zhangc, Liwei Panc, Rui Caib,*, Fang Lua,*   

  1. aState Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
    bResearch Center for Energy Strategy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
    cCollege of Environmental and Chemical Engineering, Dalian University, Dalian 116622, Liaoning, China
  • Received:2023-05-08 Revised:2023-06-25 Accepted:2023-07-02 Online:2023-10-15 Published:2023-11-06
  • Contact: *E-mail addresses: cairui@dicp.ac.cn (R. Cai), lufang@dicp.ac.cn (F. Lu).

Abstract: The inert carbon-carbon (C-C) bonds cleavage is a main bottleneck in the chemical upcycling of recalcitrant polyolefin plastics waste. Here we develop an efficient strategy to catalyze the complete cleavage of C-C bonds in mixed polyolefin plastics over non-noble metal catalysts under mild conditions. The nickel-based catalyst involving Ni2Al3phase enables the direct transformation of mixed polyolefin plastics into natural gas, and the gas carbon yield reaches up to 89.6%. Reaction pathway investigation reveals that natural gas comes from the stepwise catalytic cleavage of C-C bonds in polypropylene, and the catalyst prefers catalytic cleavage of terminal C-C bond in the side-chain with the low energy barrier. Additionally, our developed approach is evaluated by the technical economic analysis for an economically competitive production process.

Key words: Ni-based catalyst, Mixed polyolefin plastics, C-C bonds cleavage