Fig. 4: Pressure-dependent product distributions of the photothermal polyolefin plastic recycling system.

a Product selectivities of the high-pressure (220 °C for 3 h over Ru/TiO2 catalyst) photothermal recycling of LDPE bags. b Process of high-pressure photothermal recycling of LDPE bags under 30 bar H2/N2 (v/v = 70/30). c Distributions of liquid products obtained from the photothermal recycling of LDPE bags at 220 °C for 3 h at different reaction pressures (10, 20, 30, 40 bar H2/N2 (v/v = 70/30)) over Ru/TiO2.