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Sustainable Production of Bio-Combustibles from Pyrolysis of Agro-Industrial Wastes

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Facoltà di Ingegneria e Architettura, Università degli Studi di Enna "Kore", Cittadella Universitaria, Enna 94100, Italy
2
Siciliacque S.p.A., Via Gioacchino di Marzo, Palermo 90144, Italy
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Author to whom correspondence should be addressed.
Sustainability 2014, 6(11), 7866-7882; https://doi.org/10.3390/su6117866
Received: 26 September 2014 / Revised: 27 October 2014 / Accepted: 3 November 2014 / Published: 6 November 2014
Evaluation of the sustainability of biomass pyrolysis requires a thorough assessment of the product yields and energy densities. With this purpose, a laboratory scale fixed bed reactor (FBR) was adapted from the standard Gray-King (GK) assay test on coal to conduct fixed bed pyrolysis experiments on agricultural and agro-industrial by-products. The present study provides results on the pyrolysis of two types of biomass: chipped olive tree trimmings (OT) and olive pomace (OP). Solid (char) and liquid (tar) product yields are reported. Mass yields are determined and compared with values obtained in similar works. Results indicate that char yield decreases from 49% (OT-db) and 50% (OP-db) at 325 °C to 26% (OT db) and 30% (OP-db) at 650 °C. Tar yield is almost constant (42%) at different reaction temperatures for OT, while it decreases slightly from 42% to 35% for OP. Energy density of the products at different peak temperatures is almost constant for OT (1.2), but slightly increases for OP (from a value of 1.3 to a value of 1.4). View Full-Text
Keywords: pyrolysis; agro-industrial residues; fixed-bed reactor, char and tar yields pyrolysis; agro-industrial residues; fixed-bed reactor, char and tar yields
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Volpe, M.; D'Anna, C.; Messineo, S.; Volpe, R.; Messineo, A. Sustainable Production of Bio-Combustibles from Pyrolysis of Agro-Industrial Wastes. Sustainability 2014, 6, 7866-7882.

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