上海科技大学知识管理系统

Facing the rapidly increasing plastic waste, hydrogenolysis is an efficient method for converting it into value-added products, such as aviation fuels. With their abundant reserves and low cost, Ni-based catalysts have demonstrated significant potential to replace noble metal catalysts for the degradation of waste polyethylene. In this study, we report a bimetallic 10Ni2Fe/Al2O3 catalyst for the hydrogenolysis of low-density polyethylene (LDPE) to produce aviation fuel range alkanes under mild reaction conditions. This catalyst achieved a maximum liquid yield of 79%, with a selectivity of C8-C16 hydrocarbons reaching 74% at 300 degrees C and 3 MPa of H2 within 5 h. The addition of Fe enhanced the dispersion of Ni nanoparticles and increased the rate of internal C-C bond cleavage, thereby suppressing the formation of CH4 and improving the selectivity of C8-C16 alkanes. With Fe doping, the reaction rate increased 2.5 times, and the ratio of end to internal C-C bond cleavage dropped from 2.86 to 1.29. These results indicate the feasibility of upcycling polyethylene into aviation fuel range alkanes using a non-noble metal catalyst, providing a new pathway for the utilization and upcycling of plastic waste.