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Particle emissions from a domestic pellets-fired boiler

Fernandes, U. ; Costa, M.

Fuel processing technology, 2012-11, Vol.103, p.51-56 [Periódico revisado por pares]

Amsterdam: Elsevier B.V

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  • Título:
    Particle emissions from a domestic pellets-fired boiler
  • Autor: Fernandes, U. ; Costa, M.
  • Assuntos: Applied sciences ; calcium ; carbon ; combustion ; Domestic boiler ; Emissions ; Energy ; energy-dispersive X-ray analysis ; Energy. Thermal use of fuels ; Exact sciences and technology ; fuel bed ; Fuels ; magnesium ; oxygen ; particulate emissions ; Particulate matter ; potassium ; scanning electron microscopes ; scanning electron microscopy ; sodium ; soot ; spectroscopy ; Wood pellets ; X-radiation
  • É parte de: Fuel processing technology, 2012-11, Vol.103, p.51-56
  • Notas: http://dx.doi.org/10.1016/j.fuproc.2011.08.020
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  • Descrição: The main purpose of the present work was to quantify and characterize morphologically and chemically the emissions of particulate matter (PM) from a domestic pellet-fired boiler during steady-state operation for different boiler thermal inputs. The PM quantification was made with the aid of a low pressure three-stage cascade impactor and the PM characterization using SEM/EDS analysis (scanning electron microscope/energy dispersive X-ray spectrometry). The measured PM emissions varied between ≈160mg/Nm3@13% O2 and ≈490mg/Nm3@13% O2, being the emissions mainly dominated by particles with sizes below 2.5μm and above 10μm regardless of the thermal input. The SEM analyses revealed the presence of ultra fine (<100nm) particles, sub-micrometer and micrometer sized particles/agglomerates, and isolated spherical and irregularly shaped large particles for all boiler operating conditions examined. The ultra fine particles, formed after the soot formation process, were composed mainly of O, K, Cl, Na and S; the sub-micrometer (and micrometer) sized particles/agglomerates, formed from soot, contained mainly carbon, oxygen, Ca, Mg, K and P; and the isolated spherical and irregularly shaped large particles, released from the fuel bed during combustion, consisted mostly of carbon and oxygen with minor amounts of Ca and Mg. ► PM emissions dominated by particles with sizes below 2.5μm and above 10μm. ► Ultra fine particles were composed mainly of O, K, Cl, Na and S. ► Sub-micrometer sized particles/agglomerates contained mainly C, O, Ca, Mg, K and P. ► Spherical and irregularly shaped large particles consisted mostly of C and O.
  • Editor: Amsterdam: Elsevier B.V
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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