We found that CeO<sub>2</sub>-supported Ru acted as an effective and reusable heterogeneous catalyst, showing much higher activity than other metal-supported catalysts in hydrogenolysis of low-density polyethylene, and the catalyst worked well under mild reaction conditions such as low temperature of 473 K and low hydrogen pressure of 2 MPa, providing liquid fuel (C5-C21) and wax (C22-C45) in 77 % and 15 % yields (total 92 % yield), respectively. It is characteristic that this catalyst gave rather low selectivity to gaseous products. This catalyst was also applicable to hydrogenolysis of various low density polyethylenes, high-density polyethylene, polypropylene to provide the valuable chemicals (liquid fuel +wax) in high yields (83–90 %).

Catalytic upgrading of waste polyolefinic plastics into liquid fuels and waxes using CeO2-supported Ru catalysts

ACS Spring 2022

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