Analysis of the chemical composition of ultrafine particles from two domestic solid biomass fired room heaters under simulated real-world use
Articolo
Data di Pubblicazione:
2017
Citazione:
Analysis of the chemical composition of ultrafine particles from two domestic solid biomass fired room heaters under simulated real-world use / S. Ozgen, S. Becagli, V. Bernardoni, S. Caserini, D. Caruso, L. Corbella, M. Dell'Acqua, P. Fermo, R. Gonzalez, G. Lonati, S. Signorini, R. Tardivo, E. Tosi, G. Valli, R. Vecchi, M. Marinovich. - In: ATMOSPHERIC ENVIRONMENT. - ISSN 1352-2310. - 150(2017 Feb), pp. 87-97.
Abstract:
Two common types of wood (beech and fir) were burned in commercial
pellet (11.1 kW) and wood (8.2 kW) stoves following a combustion cycle simulating the
behavior of a real-world user. Ultrafine particulate matter (UFP, dp<100 nm) was sampled
with three parallel multistage impactors and analyzed for metals, main water soluble ions,
anhydrosugars, total carbon, and PAH content. The measurement of the number concentration
and size distribution was also performed by a fourth multistage impactor. UFP mass emission
factors averaged to 424 mg/kgfuel for all the tested stove and wood type (fir, beech)
combinations except for beech log burning in the wood stove (838 mg/kgfuel). Compositional
differences were observed for pellets and wood UFP samples, where high TC levels
characterize the wood log combustion and potassium salts are dominant in every pellet
sample. Crucial aspects determining the UFP composition in the wood stove experiments are
critical situations in terms of available oxygen (a lack or an excess of combustion air) and
high temperatures. Whereas for the automatically controlled pellets stove local situations
(e.g., hindered air-fuel mixing due to heaps of pellets on the burner pot) determine the
emission levels and composition. Wood samples contain more potentially carcinogenic PAHs
with respect to pellets samples. Some diagnostic ratios related to PAH isomers and
anhydrosugars compiled from experimental UFP data in the present study and compared to
literature values proposed for the emission source discrimination for atmospheric aerosol,
extend the evaluation usually limited to higher particle size fractions also to UFP.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Chemical composition; Small scale application; Stove; Ultrafine particle emission; Wood; Wood pellet
Elenco autori:
S. Ozgen, S. Becagli, V. Bernardoni, S. Caserini, D. Caruso, L. Corbella, M. Dell'Acqua, P. Fermo, R. Gonzalez, G. Lonati, S. Signorini, R. Tardivo, E. Tosi, G. Valli, R. Vecchi, M. Marinovich
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