A. Serrera

The CO2 gasification kinetics of olive residue

Abstract Orujillo , sometimes called wood matter from pressed oil-stone (WPOS) is a residue from the olive oil mill industry. The generation of this biomass residue is concentrated in small areas allowing its use as fuel for medium size gasification and combustion plants. Rates of gasification of WPOS char were measured in a TGA at various temperatures (800–850–875–900–950°C), CO 2 partial pressures (0.20–0.35– 0.50 bar ) and CO partial pressures (0.0– 0.20 bar ). The experiments were carried out with a monolayer bed of very fine particles well exposed to the gas so as to minimise mass and heat transfer resistances. Two kinetic models, the n th order model and Langmuir–Hinshelwood model, have been used to fit with the reactivity data. For pure CO 2 experiments the kinetic parameters of n th order model were E=133 kJ/mol and n =0.43. The Langmuir–Hinshelwood kinetic model clearly describes the observed CO inhibition effect on the CO 2 gasification.