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Particulate inorganic salts and trace element emissions of a domestic boiler fed with five commercial brands of wood pellets

Abstract : Pellet stoves arouse a real interest from consumers because they are perceived as a renewable and carbon neutral energy. However, wood combustion can contribute significantly to air pollution, in particular through the emission of particulate matter (PM). In this article, five brands of wood pellets were burnt under optimal combustion conditions and trace element and inorganic salt emission factors (EFs) in PM were determined. Results show that a significant proportion of metals such as lead, zinc, cadmium, and copper initially present in pellets were emitted into the air during combustion with 20 ± 6%, 31 ± 12%, and 19 ± 6% of the initial content respectively for Zn, Pb, and Cd. The median emission factors for Pb, Cu, Cd, As, Zn, and Ni were respectively 188, 86, 9.3, 8.7, 2177, and 3.5 μg kg−1. The inorganic fraction of the PM emissions was dominated by K+, SO42−, and Cl− with respective EFs of 33, 28.7, and 11.2 mg kg−1. Even taking into account a consumption of 40.1 million tons by 2030 in the EU, the resulting pollution in terms of heavy metal emissions remains minimal in comparison with global emissions in the EU.
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https://hal-normandie-univ.archives-ouvertes.fr/hal-02541712
Contributor : Hélène Lavanant <>
Submitted on : Tuesday, April 14, 2020 - 10:00:18 AM
Last modification on : Thursday, July 2, 2020 - 3:30:05 AM

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Stéphane Marcotte, Clément Castilla, C.J. Morin, Nadine Merlet-Machour, Luis Carrasco-Cabrera, et al.. Particulate inorganic salts and trace element emissions of a domestic boiler fed with five commercial brands of wood pellets. Environmental Science and Pollution Research, Springer Verlag, 2020, 27, pp.18221-18231. ⟨10.1007/s11356-020-08329-8⟩. ⟨hal-02541712⟩

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