Cristin-resultat-ID: 1036173
Sist endret: 22. juni 2015, 14:24
NVI-rapporteringsår: 2013
Resultat
Vitenskapelig artikkel
2013

Performance of a Residential Pellet Combustor Operating on Raw and Torrefied Spruce and Spruce-Derived Residues

Bidragsytere:
  • Roger Antoine Khalil
  • Quang Vu Bach
  • Øyvind Skreiberg og
  • Khanh-Quang Tran

Tidsskrift

Energy & Fuels
ISSN 0887-0624
e-ISSN 1520-5029
NVI-nivå 2

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2013
Volum: 27
Hefte: 8
Sider: 4760 - 4769

Importkilder

Isi-ID: 000323301300069

Beskrivelse Beskrivelse

Tittel

Performance of a Residential Pellet Combustor Operating on Raw and Torrefied Spruce and Spruce-Derived Residues

Sammendrag

The heterogeneous nature of solid biomass fuels makes their combustion a substantial challenge compared to the more traditional fuel types such as fossil fuels and natural gas. Many studies found in the literature attempt at identifying enhancements in fuel properties of biomass after a thermal pretreatment step such as torrefaction, but only few investigate specifically the combustion behavior of these fuels. In this study, pellets combustion of raw and torrefied spruce and spruce tree tops and branches (T&B) has been investigated with regards to the emissions of gaseous pollutants and particulate matter (PM). The combustion was performed in a residential pellets stove where a total of 6 different feedstocks, with and without pretreatment, were tested. The wide range of the feedstocks properties was shown to go beyond the design limitations of the pellet stove. This could be seen as combustion instability for the T&B torrefied at 275 ºC. Technology adjustments might be needed in terms of combustion air distribution and chamber design for these fuels. Mild torrefaction in general reduced the emissions of CO, unburned hydrocarbons, and the organics in particles smaller than 1 µm. Combustion at a low load (low thermal input) resulted as expected in increased emissions of organic compounds, which was again reduced substantially for the mildly torrefied feedstocks. Compared to raw spruce at low load a reduction by a factor of 3 from the organic share of the PM1.0 particles is obtained. For the same experiments CO in the flue gas is reduced by 150 %. For T&B similar trends were obtained for organic particles, however, torrefaction resulted in an increase in the total PM1.0 emissions. The decrease in the organic share was more than offset by a substantial increase in the inorganic share of the PM1.0 emissions. For this reason, torrefaction might not be a viable pretreatment solution for feedstocks with high ash content for use in stoves for residential heating, without combustion technology adjustments.

Bidragsytere

Roger Antoine Khalil

  • Tilknyttet:
    Forfatter
    ved Termisk energi ved SINTEF Energi AS

Quang Vu Bach

  • Tilknyttet:
    Forfatter
    ved Institutt for energi- og prosessteknikk ved Norges teknisk-naturvitenskapelige universitet

Øyvind Skreiberg

  • Tilknyttet:
    Forfatter
    ved Termisk energi ved SINTEF Energi AS

Quang Khanh Tran

Bidragsyterens navn vises på dette resultatet som Khanh-Quang Tran
  • Tilknyttet:
    Forfatter
    ved Institutt for energi- og prosessteknikk ved Norges teknisk-naturvitenskapelige universitet
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