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Microwave pyrolysis of olive pomace for bio-oil and bio-char production

Kostas, ET; Durán-Jiménez, G; Shepherd, BJ; Meredith, W; Stevens, LA; Williams, OSA; Lye, GJ; (2020) Microwave pyrolysis of olive pomace for bio-oil and bio-char production. Chemical Engineering Journal , 387 , Article 123404. 10.1016/j.cej.2019.123404. Green open access

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Abstract

Olive pomace is a widely available agro-industrial waste residue in Europe that has the potential to contribute towards a circular, low carbon bio-economy. This study demonstrated, for the first time, the ability to successfully pyrolyse olive pomace with microwaves for the production of bio-char and bio-oil. It was found that the energy requirement needed to pyrolyse up to 80% of the olive pomace was as low as 3.6 kJ/g and bio-oil yields up to 30% were produced. Microwave power did not influence the overall yields or the chemical composition of the obtained bio-oils, but did alter the textural properties of the generated bio-chars and their ability to remove methylene blue dye. Optimum processing conditions were found to be within the 3.6 kJ/g energy requirement with a microwave power of 200 W and processing time of 180 sec. These conditions produced a bio-oil fraction containing mainly acetic acid (71.9%) and a bio-char with a surface area of 392.3 m2/g, micropore volume of 0.15 cm3/g and a methylene blue removal efficiency of 40 qMB mg/g. The results acquired from this study reveal the superiority of microwave heating in a pyrolysis system and highlight a novel and prospective route for added value recovery from natural waste resources like olive pomace.

Type: Article
Title: Microwave pyrolysis of olive pomace for bio-oil and bio-char production
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.cej.2019.123404
Publisher version: https://doi.org/10.1016/j.cej.2019.123404
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Microwave pyrolysis, Olive pomace, Bio-oil, Bio-char, Bioenergy
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Biochemical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/10088950
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