Production of Aromatic Hydrocarbons from Co‐Hydropyrolysis of Biomass Components and HDPE with Application of Modified HZSM‐5 Catalyst

Experiments were conducted in this study on the co‐hydropyrolysis of three components of biomass (cellulose, hemicellulose, and lignin) and HDPE by using SR‐Pd/Trap‐HZ‐5 as catalyst. To control the variable, we use the same experiment conditions in co‐hydropyrolysis: Si/Al ratio of 50, Pd load 1 %, catalyst to reactant ratio of 1 : 10, 1 MPa, 400 °C, reaction time 1 h. Use XRD, TEM, BET, and NH 3 ‐TPD to confirm catalyst successful synthesis; use pine sawdust (PW) co‐hydropyrolysis with HDPE to analyse catalytic activity; and use GC/MS to characterize the chemical composition of the bio‐oil from the co‐hydropyrolysis of biomass components and HDPE. The results show that cellulose has a significant synergistic effect with aromatic hydrocarbon production, whose selectivity was 93.3 %; hemicellulose has a synergistic effect; aromatic selectivity can reach 75.1 %; and a negative synergistic effect between lignin and HDPE was shown as the selectivity of aromatic hydrocarbons decreased from 62.1 % to 15.6 %.