In situ analysis of ash deposits from black liquor combustion

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Aerosols formed during combustion of black liquor cause a significant fire-side fouling problem in pulp mill recovery boilers. The ash deposits reduce heat transfer effectiveness, plug gas passages, and contribute to corrosion. Both vapors and condensation aerosols lead to the formation of such deposits. The high ash content of the fuel and the low dew point of the condensate salts lead to a high aerosol and vapor concentration in most boilers. In situ measurements of the chemical composition of these deposits is an important step in gaining a fundamental understanding of the deposition process. Infrared emission spectroscopy is used to ... continued below

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24 p.

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Bernath, P.; Sinquefield, S.A.; Baxter, L.L.; Sclippa, G.; Rohlfing, C. & Barfield, M. May 1, 1996.

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  • Bernath, P. Sandia National Labs., Livermore, CA (United States). Combustion Research Facility
  • Sinquefield, S.A. Sandia National Labs., Livermore, CA (United States). Combustion Research Facility
  • Baxter, L.L.
  • Sclippa, G.
  • Rohlfing, C. Sandia National Labs., Livermore, CA (United States). Combustion Research Facility
  • Barfield, M. Sandia National Labs., Livermore, CA (United States). Combustion Research Facility

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Livermore, CA (United States)
    Place of Publication: Livermore, California

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Description

Aerosols formed during combustion of black liquor cause a significant fire-side fouling problem in pulp mill recovery boilers. The ash deposits reduce heat transfer effectiveness, plug gas passages, and contribute to corrosion. Both vapors and condensation aerosols lead to the formation of such deposits. The high ash content of the fuel and the low dew point of the condensate salts lead to a high aerosol and vapor concentration in most boilers. In situ measurements of the chemical composition of these deposits is an important step in gaining a fundamental understanding of the deposition process. Infrared emission spectroscopy is used to characterize the composition of thin film deposits resulting from the combustion of black liquor and the deposition of submicron aerosols and vapors. New reference spectra of Na{sub 2}SO{sub 4}, K{sub 2}SO{sub 4}, Na{sub 2}CO{sub 3} and K{sub 2}CO{sub 3} pure component films were recorded and compared with the spectra of the black liquor deposit. All of the black liquor emission bands were identified using a combination of literature data and ab initio calculations. Ab initio calculations also predict the locations and intensities of bands for the alkali vapors of interest. 39 refs., 9 figs.

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24 p.

Notes

OSTI as DE96008706

Source

  • 26. international symposium on combustion, Naples (Italy), 28 Jul - 2 Aug 1996

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  • Other: DE96008706
  • Report No.: SAND--96-8502C
  • Report No.: CONF-960772--12
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 244529
  • Archival Resource Key: ark:/67531/metadc669191

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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Creation Date

  • May 1, 1996

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • April 12, 2016, 8:17 p.m.

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Bernath, P.; Sinquefield, S.A.; Baxter, L.L.; Sclippa, G.; Rohlfing, C. & Barfield, M. In situ analysis of ash deposits from black liquor combustion, article, May 1, 1996; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc669191/: accessed October 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.