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    The Influence of Boron on the Emission of Sodium during Black Liquor Combustion under Oxidative Conditions (2009)

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    Type of Content
    Journal Article
    UC Permalink
    http://hdl.handle.net/10092/3814
    
    Publisher
    University of Canterbury. Chemical and Process Engineering
    ISSN
    1038-6807
    Related resource(s)
    http://search.informit.com.au/documentSummary;dn=727108157966108;res=IELHSS
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    • Engineering: Journal Articles [1535]
    Authors
    Saw, W.L.
    Forssén, M.
    Hupa, M.
    Nathan, G.J.
    Ashman, P.J.
    show all
    Abstract

    The addition of boron to black liquor has the potential to reduce fume formation in a Kraft recovery boiler. Two Kraft black liquors, with and without boron, were analysed. Single 10 mg droplets were introduced into a furnace and were burned at temperatures of 900, 1000 and 1050ºC with oxygen concentrations of 2, 5 and 10 (vol %). Under these conditions, the addition of boron to the black liquor is found to reduce both the extent of sodium emission and the combustion time. This shows that the boron reduced the sodium loss due to the lower amount of sodium carbonate available to be decomposed by the char. The char combustion time of the liquor with boron is found to be shorter because some of the char may be consumed by the borate. The added boron reduced the sodium loss mainly during the char combustion stage.

    Citation
    Saw, W.L., Forssén, M., Hupa, M., Nathan, G.J., Ashman, P.J. (2009) The Influence of Boron on the Emission of Sodium during Black Liquor Combustion under Oxidative Conditions. Appita Journal, 62(3), pp. 219-225.
    This citation is automatically generated and may be unreliable. Use as a guide only.
    Keywords
    kraft pulping; chemical recovery; black liquor; sodium; boron
    Rights
    https://hdl.handle.net/10092/17651

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    • Influence of droplet size on the release of atomic sodium during the combustion of black liquor 

      Saw, W.L.; Nathan, G.J.; Ashman, P.J.; Hupa, M. (University of Canterbury. Chemical and Process Engineering, 2009)
      This paper reports on the implementation of a quantitative planar laser-induced fluorescence (PLIF), which employs an absorption technique simultaneously, to assess the effect of initial diameter on the release of atomic ...
    • Assessment of the release of atomic Na from a burning black liquor droplet using quantitative PLIF 

      Saw, W.L.; Nathan, G.J.; Ashman, P.J.; Alwahabi, Z.T. (University of Canterbury. Chemical and Process Engineering, 2009)
      The quantitative measurement of atomic sodium (Na) release, at high concentration, from a burning black liquor droplet has been demonstrated using a planar laser-induced fluorescence (PLIF) technique, corrected for ...
    • Surface temperature measurement of a burning black liquor droplet using two-colour optical pyrometry 

      Saw, W.L.; Nathan, G.J.; Ashman, P.J.; Alwahabi, Z.T.; Hupa, M. (University of Canterbury. Chemical and Process Engineering, 2009)
      This paper reports on the implementation of two-colour optical pyrometry to measure the distribution of surface temperature of a burning black liquor droplet in a flat flame environment. The black liquor was burned in the ...
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