A Novel Lab‐Scale Fixed‐Bed Pyrolysis Reactor for Biofuel Production from Agro‐Waste: Experimental Set‐up and Preliminary Life Cycle Assessment Study

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The present study reports the features and set-up of a novel lab-scale fixed bedpyrolysis reactor for the production of solid and liquid bio-fuels from waste biomass. Thefixed bed reactor is tested by carrying out pyrolysis experiments using two different wastebiomasses. Olive tree trimmings (OT) and olive pulp (OP), olive cultivation and olive millindustries residues respectively, are pyrolyzed, under nitrogen atmosphere, between 200and 650 °C for a residence time of 0.5 h. The OT and OP pyrolysis chars were characterizedin terms of mass yields, high calorific values (HHVs), proximate and elemental analysis. Charmass yields, on a dry basis (d.b.), decreased from 91 to 23 wt% and from 93 to 32 wt% forOT and OP respectively with increasing pyrolysis temperature. HHVs increased between200 and 325 °C up to 27.71 and 31.42 MJ/kg for OT and OP respectively but start decreasingwhen further rising the pyrolysis temperature to 24.36 and 28.44 MJ/kg for OT and OPrespectively at 650 °C. The novel pyrolysis system set-up shows to be an efficient andeffective tool to test biomass pyrolysis at lab scale level and adapt to produce high energydense bio-chars for solid fuel applications starting from waste biomass. A preliminary lifecycle assessment (LCA) of the pyrolysis process is carried out for the two examined wastebiomasses, for calculating the life-cycle environmental impacts for the production of 1 MJof thermal energy by pyro-char combustion.
Original languageEnglish
Title of host publicationXX CONGRESSO NAZIONALE CIRIAF - Sviluppo Sostenibile, Tutela dell'Ambiente e della Salute Umana - Atti
Number of pages9
Publication statusPublished - 2020

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