Simultaneous measurement of the surface temperature and the release of atomic sodium from a burning black liquor droplet

Journal Article · Thu Apr 15 00:00:00 EDT 2010 · Combustion and Flame

DOI:https://doi.org/10.1016/J.COMBUSTFLAME.2009.12.016· OSTI ID:21305681

Saw, Woei L; Nathan, Graham J ^[1]; Ashman, Peter J; Alwahabi, Zeyad T ^[1]; Hupa, Mikko ^[2]

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1. Centre for Energy Technology, The University of Adelaide, SA 5006 (Australia)
2. Process Chemistry Centre, Aabo Akademi, Biskopsgatan 8 FI-20500 Aabo (Finland)

Simultaneous measurement of the concentration of released atomic sodium, swelling, surface and internal temperature of a burning black liquor droplet under a fuel lean and rich condition has been demonstrated. Two-dimensional two-colour optical pyrometry was employed to determine the distribution of surface temperature and swelling of a burning black liquor droplet while planar laser-induced fluorescence (PLIF) was used to assess the temporal release of atomic sodium. The key findings of these studies are: (i) the concentration of atomic sodium released during the drying and devolatilisation stages was found to be correlated with the external surface area; and (ii) the insignificant presence of atomic sodium during the char consumption stage shows that sodium release is suppressed by the lower temperature and by the high CO{sub 2} content in and around the particle. (author)

• OSTI ID: 21305681
• Journal Information: Combustion and Flame, Vol. 157, Issue 4; Other Information: Elsevier Ltd. All rights reserved; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
SODIUM
SPENT LIQUORS
DROPLETS
CARBON DIOXIDE
TEMPERATURE DEPENDENCE
SURFACES
SWELLING
COLOR
SURFACE AREA
CHARS
TEMPERATURE DISTRIBUTION
DRYING
FUELS
CORRELATIONS
Surface temperature