Catalytic Effects of Potassium Concentration on Steam Gasification of Biofuels Blended from Olive Mill Solid Wastes and Pine Sawdust for a Sustainable Energy of Syngas

Chafaa Nsibi, Victor Pozzobon (), Javier Escudero-Sanz and Marzouk Lajili
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Chafaa Nsibi: EMIR (Etude des Milieux Ionisés et Réactifs) Laboratory, Monastir University, 15 Avenue Ibn Eljazzar IPEIM, Monastir 5019, Tunisia
Victor Pozzobon: Centre Européen de Biotechnologie et de Bioéconomie (CEBB), Laboratoire de Génie des Procédés et Matériaux, Centrale Supélec, Université Paris-Saclay, 3 rue des Rouges Terres, 51110 Pomacle, France
Javier Escudero-Sanz: Ecole des Mines Albi-Carmaux, RAPSODEE Laboratory, Campus Jarlard, CEDEX 09, 81013 Albi, France
Marzouk Lajili: EMIR (Etude des Milieux Ionisés et Réactifs) Laboratory, Monastir University, 15 Avenue Ibn Eljazzar IPEIM, Monastir 5019, Tunisia

Sustainability, 2024, vol. 16, issue 20, 1-17

Abstract: The effect of potassium impregnation at different concentrations during gasification, under nitrogen/water steam atmosphere, of char produced via pyrolysis of olive mill residues blended or not with pine sawdust was investigated. Three concentrations (0.1 M, 0.5 M, and 1.5 M) of potassium carbonate solution (K 2 CO 3 ) were selected to impregnate samples. First, four types of pellets were prepared; one using exhausted olive mill solid waste (G) noted (100G) and three using G blended with pine sawdust (S) in different percentages (50%S–50%G (50S50G); 60%S–40%G (60S40G); 80%S–20%G (80S20G)). Investigations showed that when isothermal temperature increases during the gasification conducted with two water steam percentages of 10% and 30%, the reactivity increases with potassium concentration up to 0.5 M, especially for 100G. Still, higher catalyst concentration (1.5 M) showed adverse effects attributable to silicon release and char pore fouling. Moreover, the effect of the steam concentration on the gasification reactivity was significant with the non-impregnated sample 100G. Finally, a kinetic study was carried out to determine the different kinetic parameters corresponding to the Arrhenius law.

Keywords: catalyst; biofuel; potassium; gasification; waste (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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