fig7

Figure 7. (A) The role of Ru in the upcycling of HDPE over Ru/HZSM-5(300). Monocyclic aromatic yield shown by HZSM-5(300) and Ru/HZSM-5(300) in cyclohexane conversion at 280 °C for 24 h; (B) The role of zeolites in the upcycling of HDPE. Yields of volatiles/gases, liquid-phase products and insoluble hydrocarbons; (C) Selectivity for volatiles/gases and liquid-phase and (D) GPC analysis of the solid residues for HDPE upcycling conducted over Ru/SAPO-34, Ru/USY and Ru/HZSM-5(300) at 280 °C for 24 h. These figures are quoted with permission from Du et al.^[33]; (E) The framework image of USY, ZSM-5 and SAPO-34. HDPE: High-density polyethylene; GPC: gel permeation chromatography.