Role of pore structure in the deactivation of zeolites (HZSM-5, Hβ and HY) by coke in the pyrolysis of polyethylene in a conical spouted bed reactor

▶ Deactivation of zeolite catalysts of different shape selectivity in HDPE cracking. ▶ Role of zeolite shape selectivity on coke deposition. ▶ Analysis and morphology of the coke deposited on different zeolites. ▶ Good performance of the HZSM-5 zeolite for light olefin production. ▶ Low deactivation by coke with TOS of the HZSM-5 zeolite in the cracking of HDPE.