Evaluation of two approaches for the synthesis of hierarchical micro-/mesoporous catalysts for HDPE hydrocracking

Plastic waste management has become a pressing global issue. A viable and sustainable alternative to incineration is the conversion of polyethylene into chemicals or fuels by through hydrocracking. To improve catalytic performance during hydrocracking, bifunctional catalysts are required, in which zeolite imparts acid function, metallic function provided noble transition metal, such as nickel. In this study, supports were synthesized using two strategies, namely zeolitisation desilication, for comparison. The materials exhibited Si/Al molar ratios approximately 10, hierarchical micro-/mesoporosities, character after incorporation nickel up 5 wt%. extensively characterized various techniques, including powder X-Ray diffraction, N2 sorption, acidity measurement, scanning electron microscopy. characterization results showed that desilicated HZSM5 was most effective support impregnation, leading quantitative High-Density Polyethylene (HDPE) hydrocracking formation predominantly hydrocarbons with carbon atoms. clear disparity composition, prevalence gasoline-type fraction, observable liquid phase from Ni particles supported on HZSM-5 ([email protected]). hierarchy factor (HF), ratio between Lewis Brønsted sites, accessibility (ACI) combined form interplay (IF). investigation resulted IF values 0.35 7, positive correlation HDPE observed. conclusion, study suggests desilication promising route development efficient plastic waste.