Batch, semi-batch and autoclave reactors were also tested to
pyrolyse polyethylene with different catalysts. MCM-41 promoted
the cracking of high-density polyethylene (HDPE) into lighter
liquid and gaseous products [11] at 380 C; Paraffins and aromatic
compounds were strongly present. At 550 C, HZSM-5 favored the
formation of gases in the light fraction (C2–C4) and the condensed
products were mainly aromatics [12].