Polyethylene hydrogenolysis by dilute RuPt alloy to achieve H2-pressure-independent low methane selectivity

Qikun Hu, Shuairen Qian, Yuqi Wang, Jiayang Zhao, Meng Jiang, Mingze Sun, Helai Huang, Tao Gan, Jun Ma, Jing Zhang, Yi Cheng and Zhiqiang Niu ()
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Qikun Hu: Tsinghua University
Shuairen Qian: Tsinghua University
Yuqi Wang: Tsinghua University
Jiayang Zhao: Tsinghua University
Meng Jiang: Norwegian University of Science and Technology
Mingze Sun: Tsinghua University
Helai Huang: Tsinghua University
Tao Gan: Chinese Academy of Sciences
Jun Ma: Harbin Institute of Technology
Jing Zhang: Harbin Institute of Technology
Yi Cheng: Tsinghua University
Zhiqiang Niu: Tsinghua University

Nature Communications, 2024, vol. 15, issue 1, 1-10

Abstract: Abstract Chemical recycling of plastic waste could reduce its environmental impact and create a more sustainable society. Hydrogenolysis is a viable method for polyolefin valorization but typically requires high hydrogen pressures to minimize methane production. Here, we circumvent this stringent requirement using dilute RuPt alloy to suppress the undesired terminal C–C scission under hydrogen-lean conditions. Spectroscopic studies reveal that PE adsorption takes place on both Ru and Pt sites, yet the C–C bond cleavage proceeds faster on Ru site, which helps avoid successive terminal scission of the in situ-generated reactive intermediates due to the lack of a neighboring Ru site. Different from previous research, this method of suppressing methane generation is independent of H2 pressure, and PE can be converted to fuels and waxes/lubricant base oils with only

Date: 2024
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DOI: 10.1038/s41467-024-54786-x

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