The relationship between mineral contents, particle matter and bottom ash distribution during pellet combustion: molar balance and chemometric analysis.
This paper aims to identify the correlation between the mineral contents in agropellets and particle matter and bottom ash characteristics during combustion in domestic boilers. Four agrifood residues with higher mineral contents, namely grape marc (GM), tomato waste (TW), exhausted olive mill solid waste (EOMSW) and olive mill wastewater (OMWW), were selected. Then, seven different pellets were produced from pure residues or their mixture and blending with sawdust. The physico-chemical properties of the produced pellets were analysed using different analytical techniques, and a particular attention was paid to their mineral contents. Combustion tests were performed in 12-kW domestic boiler. The particle matter (PM) emission was characterised through the particle number and mass quantification for different particle size. The bottom ash composition and size distribution were also characterised. Molar balance and chemometric analyses were performed to identify the correlation between the mineral contents and PM and bottom ash characteristics. The performed analyses indicate that K, Na, S and Cl are released partially or completely during combustion tests. In contrast, Ca, Mg, Si, P, Al, Fe and Mn are retained in the bottom ash. The chemometric analyses indicate that, in addition to the operating conditions and the pellet ash contents, K and Si concentrations have a significant effect on the PM emissions as well as on the agglomeration of bottom ash.
Université de Strasbourg, Université de Haute-Alsace, Institut de Science des Matériaux de Mulhouse, UMR CNRS 7361, 3 Bis Rue Alfred Werner, 68093, Mulhouse, France.
Mejdi
M
Jeguirim
Université de Strasbourg, Université de Haute-Alsace, Institut de Science des Matériaux de Mulhouse, UMR CNRS 7361, 3 Bis Rue Alfred Werner, 68093, Mulhouse, France.
Nesrine
N
Kraiem
UR Etude des Milieux Ionisés et Réactifs, IPEIM, Avenue Ibn El Jazzar, 5019, Monastir, Tunisie.
Marzouk
M
Lajili
University of Grenoble Alpes, LGP2, Grenoble, 38000, France.
Chamseddine
C
Guizani
Faculty of Pure and Applied Sciences, Environmental Conservation and Management, 2252, Latsia, Nicosia, Cyprus.
Antonis
A
Zorpas
Laboratoire Vigne Biotechnologie et Environnement, Biopole Colmar, 68000, Colmar, France.
Yann
Y
Leva
Université de Strasbourg, Université de Haute-Alsace, Institut de Science des Matériaux de Mulhouse, UMR CNRS 7361, 3 Bis Rue Alfred Werner, 68093, Mulhouse, France.
Laure
L
Michelin
Université de Strasbourg, Université de Haute-Alsace, Institut de Science des Matériaux de Mulhouse, UMR CNRS 7361, 3 Bis Rue Alfred Werner, 68093, Mulhouse, France.
Ludovic
L
Josien
Université de Strasbourg, Université de Haute-Alsace, Institut de Science des Matériaux de Mulhouse, UMR CNRS 7361, 3 Bis Rue Alfred Werner, 68093, Mulhouse, France. lionel.limousy@uha.fr.
Lionel
L
Limousy
D060729:Coal Ash / Q000737:chemistry*; D017745:Incineration; D008903:Minerals; D031658:Olea; D010316:Particle Size; D062611:Solid Waste
D060729:Coal Ash; D008903:Minerals; D062611:Solid Waste
Bottom ash; Chemometric analysis; Combustion; PM emissions; Pellets; Size distribution