Thermal degradation of olive solid waste: Influence of particle size and oxygen concentration

Ajmia Chouchene, Mejdi Jeguirim, Basma Khiari, Fathi Zagrouba and Gwénaëlle Trouvé

Resources, Conservation & Recycling, 2010, vol. 54, issue 5, 271-277

Abstract: The aim of this work is to study the effect of the particle size and the oxygen content on the thermal degradation of olive solid waste (OSW). Thermogravimetric analyses of different particles sizes (0.5–2.8mm in diameter) were performed. Three different atmospheres were used: on the one hand, an inert atmosphere (N2) in order to study the pyrolysis of the olive solid waste and on the other hand two oxidative atmosphere (10% O2/N2; 20% O2/N2). Pyrolysis under oxidative conditions (10% O2/N2; 20% O2/N2) takes place according to three stages: drying, volatiles emission and char oxidation whereas in the case of pyrolysis under inert conditions only the two first stages occur. Loss of humidity and volatiles are independent of the oxygen concentration. However, the initial temperature of char oxidation is decreasing with the increase of oxygen concentration. Weight loss profiles as well as CO and CO2 emission rates during the oxidative pyrolysis are depending on the particle size of OSW. In fact, thermal degradation and emission rates of carbon oxides emissions proceed at lower temperatures for the smallest particle size. The temperature ranges of volatilization and char oxidation as well as the amount of remaining ash are also depending on the particle size.

Keywords: Biomass; Olive solid waste; Pyrolysis; Oxidation; Thermogravimetry; Kinetics (search for similar items in EconPapers)
Date: 2010
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Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:recore:v:54:y:2010:i:5:p:271-277

DOI: 10.1016/j.resconrec.2009.04.010

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