In order to explore the feasibility of strengthening the synergistic effect during the aromatic hydrocarbon from catalytic pyrolysis of biomass and plastic wastes

three series tests about catalytic pyrolysis of cellulose and high-density polyethylene (HDPE) were carried out by the two stage fix-bed reactor.Some parameters

such as product characteristics

yield and selectivity of aromatics and carbon deposition of catalyst

were compared among the catalytic pyrolysis of single material

physical mixture (cellulose:HDPE=1:1) and stage pyrolysis.The results indicated that the obvious synergistic effect was observed during the catalytic co-pyrolysis of cellulose and HDPE (including physical mixture catalytic pyrolysis and stage catalytic pyrolysis).What's more

the stage catalytic pyrolysis had more obvious synergistic effects than simple mixture catalytic pyrolysis

which would be reflected by following indicators:① increasing the yield and selectivity of aromatics;② facilitating deoxygenation from cellulose in the form of water;③ increasing conversion of cellulose;and ④ decreasing the carbon deposit amount of catalyst.The synergies existed in the co-pyrolysis of cellulose and HDPE can be explained by Diels-Alder reaction theory.In addition

an enhancing synergistic mechanism for the stage catalytic pyrolysis of cellulose and HDPE was proposed based on the verification test of catalytic pyrolysis of HDPE in this work.