Kinetic Study of Lignocellulosic Biomasses Pyrolysis Using Thermogravimetric Analysis

Hiba Aouled Mhemed Mhemed; Jean-François Largeau; Sana Kordoghli; Mylène Marin Gallego; Fethi Zagrouba; Mohand Tazerout

Authors

Hiba Aouled Mhemed CNRS Joint Unit GEPEA, Department of Energy Systems and Environment, IMT Atlantique, 4 rue Alfred-Kastler BP 20722, 44307 Nantes Cedex 3, France Author
Jean-François Largeau ICAM, 35 rue du Champ de Manœuvres, 44430 Carquefou, France Author
Sana Kordoghli Research Laboratory for Sciences and Technologies of Environment, High Institute of Sciences and Technologies of Environment, Borj Cedria, Carthage University, Tunisia Author
Mylène Marin Gallego CNRS Joint Unit GEPEA, Department of Energy Systems and Environment, IMT Atlantique, 4 rue Alfred-Kastler BP 20722, 44307 Nantes Cedex 3, France Author
Fethi Zagrouba Research Laboratory for Sciences and Technologies of Environment, High Institute of Sciences and Technologies of Environment, Borj Cedria, Carthage University, Tunisia Author
Mohand Tazerout CNRS Joint Unit GEPEA, Department of Energy Systems and Environment, IMT Atlantique, 4 rue Alfred-Kastler BP 20722, 44307 Nantes Cedex 3, France Author

Keywords:

agricultural residues, pyrolysis, TGA, model-free, activation energy

Abstract

In this work, a kinetic analysis was performed to investigate the energy potential of abundant agricultural residues: date residues, olive stones, and spent coffee grounds. The TGA experiments were carried out from room temperature to 700°C under an inert atmosphere at different heating rates of 5, 10, 15 and 20°C.min-1. Friedman’s method seems to be the most appropriate because it contains no mathematical approximation that reduces the systematic error. The average activation energies obtained with the Friedman model are 159, 168, 201, and 170 kJ.mol-1 for date stems, date seeds, olive stone, and spent coffee grounds, respectively.