Torrefaction of olive mill waste

Please use this identifier to cite or link to this item:
Información del item - Informació de l'item - Item information
Title: Torrefaction of olive mill waste
Authors: Benavente Domenech, Verónica | Fullana, Andres
Research Group/s: Residuos, Energía, Medio Ambiente y Nanotecnología (REMAN)
Center, Department or Service: Universidad de Alicante. Departamento de Ingeniería Química | Universidad de Alicante. Instituto Universitario de Ingeniería de los Procesos Químicos
Keywords: Torrefaction | Biomass | Upgrading | Olive mill waste | Densification | Bioenergy
Knowledge Area: Ingeniería Química
Issue Date: Feb-2015
Publisher: Elsevier
Citation: Biomass and Bioenergy. 2015, 73: 186-194. doi:10.1016/j.biombioe.2014.12.020
Abstract: Two-phase olive mill waste (TPOMW) was converted via torrefaction into a carbon rich solid interesting as bioenergy feedstock. TPOMW was characterized and torrefied in an oven at temperatures ranging from 150 to 300 °C for 2 h. Mass and energy losses occurred during torrefaction were measured and the torrefied products were characterized including ultimate analysis, heating value measurements, accelerate solvent extraction (ASE) and FTIR in order to assess the effects of torrefaction on the physicochemical properties of TPOMW. Additionally, ash fouling evaluation was also performed through XRF analysis. The weight fraction of C, defined in percentage as wt.%, improved from 56 to 68 wt.% and the high heating value rose from 26.4 to 30.0 MJ·kg−1 as torrefaction temperature increased, reaching typical values of subbituminous coal and finding the best results at 200 °C in terms of maximizing the heating value and minimizing the energy losses. Accordingly, from FTIR analysis it was observed that the degree of coalification increased during torrefaction of TPOMW. ASE results shown that the residual olive oil in TPOMW was removed during torrefaction, being completely eliminated at 300 °C. The alkali index for TPOMW was found to be 0.66 kg alkali·GJ−1, which implied a high fouling tendency that could be mitigated through co-firing. Finally, t-TPOMW briquettes with good mechanical strength and energy density of 26.7 GJ·m−3 were produced using a hydraulic piston press. Results demonstrated that torrefaction allows transforming TPOMW into a coal-like material, which would imply a profitable way to manage these wastes.
Sponsor: Authors kindly wish to thank the Spanish Ministry of Economy and Competitiveness (INNPACTO Project IPT-2012-0565-310000) for financial support.
ISSN: 0961-9534 (Print) | 1873-2909 (Online)
DOI: 10.1016/j.biombioe.2014.12.020
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2015 Elsevier Ltd.
Peer Review: si
Publisher version:
Appears in Collections:INV - REMAN - Artículos de Revistas
INV - I4CE - Artículos de Revistas

Files in This Item:
Files in This Item:
File Description SizeFormat 
Thumbnail2015_Benavente_Fullana_BiomBioe_final.pdfVersión final (acceso restringido)817,36 kBAdobe PDFOpen    Request a copy
Thumbnail2015_Benavente_Fullana_BiomBioe_preprint.pdfPreprint (acceso abierto)880,46 kBAdobe PDFOpen Preview

Items in RUA are protected by copyright, with all rights reserved, unless otherwise indicated.