Title: Experimental study of nitrogen flow rate effect on olives pomaces wastes pyrolysis using thermogravimetric analysis

Authors: Emna Berrich; Mansoura Salhi; Mehrez Romdhane; Fethi Aloui

Addresses: GEPEA UMR CNRS 6144, Nantes University, IMT Atlantique, DSEE, 4 Rue Alfred, Kastler, BP20722 44307 Nantes Cedex 03, France ' Departement de Génie Chimique – Procédés, Ecole Nationale d'Ingénieurs de GABES, GABES University, Avenue Omar Ibn El Khattab, Zrig Eddakhlania 6072, Tunisia ' Departement de Génie Chimique – Procédés, Ecole Nationale d'Ingénieurs de GABES, GABES University, Avenue Omar Ibn El Khattab, Zrig Eddakhlania 6072, Tunisia ' LAMIH CNRS UMR 8201, INSA Hauts-de-France, Université Polytechnique Hauts-de-France (UVHC), Campus Mont Houy, F-59313 Valenciennes Cedex 9, France

Abstract: Olives pomaces wastes (OPW) pyrolysis behaviour was studied using thermogravimetric analysis under inert conditions. Nitrogen flow effect on OPW thermal degradation was illustrated and discussed. Thermal residence time, peaks numbers, the maximum temperatures and the conversion rates were determined and compared. For 20 and 100 ml/min, a small peak appears at 110°C, after 36 min of heating. It corresponds to the olives pomaces water evaporation. There are two major peaks in the derivative thermo-gravimetric curves. The first peak corresponds to the hemicelluloses thermal decomposition under pyrolysis conditions. The second peak corresponds to the cellulose and lignin thermal decompositions.

Keywords: olives pomaces wastes; OPW; biomass; energetic valorisation; pyrolysis process; thermo-gravimetric analysis; nitrogen flow; residence time; thermal degradation.

DOI: 10.1504/IJGW.2022.123277

International Journal of Global Warming, 2022 Vol.27 No.2, pp.143 - 154

Received: 23 Nov 2020
Accepted: 24 Sep 2021
Published online: 07 Jun 2022 *

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