期刊
REACTION CHEMISTRY & ENGINEERING
卷 7, 期 4, 页码 844-854出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1re00431j
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资金
- US Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences (BES), Division of Chemical Sciences, Geosciences and Biosciences [FWP 78459]
- DOE, Office of Science, BES, Division of Chemical Sciences, Geosciences and Biosciences [FWP 47319]
Hydrogenolysis of polypropylene (PP) and polyethylene (PE) can convert these plastics into smaller hydrocarbons. Among transition metals, ruthenium (Ru) is the most effective in producing C1-C38 alkane mixtures. The branching degree of the products depends on the position of the C-C cleavage and can be tuned by the pressure of H2.
Hydrogenolysis of polypropylene (PP) and polyethylene (PE) provides a pathway to convert these plastics into smaller hydrocarbons at relatively low temperature. Among carbon (C)-supported transition metals, ruthenium (Ru) exhibited the highest efficacy, producing mixtures of C-1-C-38 alkanes. The branching degree of the products depends on the position of the C-C cleavage, which can be tuned by the pressure of H-2. Liquid alkanes are produced below 225 degrees C and 200 degrees C from PP and PE, respectively, at 30 bar. The C distribution and branching level of the products remain invariant below full conversion of the initial polymer. Increasing H-2 pressure favors the hydrogenolysis of internal C-C bonds, reducing methane (CH4) production, and favors linear over branched products. A liquid yield of >57% was achieved with PE under optimum conditions. We reveal the impact of the starting polyolefin structure, reaction conditions, and presence of chlorine on the product distribution and branching degree.
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