Catalytic upgrading of pyrolytic oils over HZSM-5 zeolite: behaviour of the catalyst when used in repeated upgrading-regenerating cycles

摘要

The behaviour of HZSM-5 zeolite in the upgrading of a wood pyrolysis oil produced in the ENEL fast-pyrolysis plant located in Bastardo, Italy, was studied in repeated upgrading-regenerating cycles. The HZSM-5 zeolite performs a catalytic activity by its acidic sites that Through a carbonium ion mechanism, promote deoxygenation, decarboxylation and decarbonylation of the oil constituents, as well as Cracking. Oligomerisation, alkylation, isomerisation, cyclisation and aromatisation.