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

作　　者：Xiaoqin Si Jiali Chen Zhengwei Wang Yue Hu Zhiwen Ren Rui Lu Lu Liu Jing Zhang Liwei Pan Rui Cai Fang Lu 

机构地区：[1]State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,Liaoning,China [2]Research Center for Energy Strategy,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,Liaoning,China [3]College of Environmental and Chemical Engineering,Dalian University,Dalian 116622,Liaoning,China

出　　处：《Journal of Energy Chemistry》2023年第10期562-569,I0014,共9页能源化学（英文版）

基　　金：supported by the National Natural Science Foundation of China (grant 22208339);the China Postdoctoral Science Foundation (2021M693132);the National Key R&D Program of China (2019YFC1905303);the Doctoral Scientific Research Foundation of Liaoning Province (2021-BS-006);the Youth Innovation Fund of Dalian Institute of Chemical Physics (DICP I202132)。

摘　　要：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 nickelbased catalyst involving Ni_(2)Al_(3) phase 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.

关 键 词：Ni-based catalyst Mixed polyolefin plastics C–C bonds cleavage 

分 类 号：TQ426[化学工程] TQ320.1[环境科学与工程—环境工程] X705