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Carbonaceous Particle Hydration III

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Abstract

Previous soot hydration studies have been extended to compare the water uptake properties of soots from selected fuels (JP-8 Jet fuel, kerosene, diesel, and metal containing and S-containing synthetics) prepared under varying conditions with corresponding n-hexane model soots. Adsorption and desorption isotherms have yielded such adsorption parameters as the surface coverages at the limit of chemisorption and at 83% relative humidity (RH). These values increase with soot surface oxidation over the range 35–85% RH, while hydration levels at lower RH down to 22% are a function of fuel composition and combustion conditions, thus determining the extent of water uptake at higher RH. Both S- and metal-containing soots exhibit higher levels of hydration than those of the base fuel soots, a result with its origin in availability of sulfate and metal centers at the surface.

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Authors and Affiliations

  1. Department of Chemistry and Biochemistry, University of Denver, Denver, Colorado, 80208, U.S.A

    A. R. Chughtai, N. J. Miller & D. M. Smith

  2. National Renewable Energy Laboratories (NREL), Golden, Colorado, 80401, U.S.A

    J. R. Pitts

Authors
  1. A. R. Chughtai
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  2. N. J. Miller
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  3. D. M. Smith
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  4. J. R. Pitts
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Chughtai, A.R., Miller, N.J., Smith, D.M. et al. Carbonaceous Particle Hydration III. Journal of Atmospheric Chemistry 34, 259–279 (1999). https://doi.org/10.1023/A:1006221326060

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