Water, Air, and Soil Pollution

, Volume 2, Issue 1, pp 75–83 | Cite as

Reactions of gaseous pollutants with solids

IV:Infrared Study of the Reaction of H2Swith a Calcined Dolomite, CaO,and MgO
  • M. J. D. Low
  • P. L. Lee
Article

Abstract

Many desulfurization processes involve the pickup of H2S by a solid absorbent, but the surface chemistry is not understood. Consequently, IR spectra were recorded of H2S chemisorbed at 25°C by a calcined dolomite, CaO, and MgO in order to provide information about the nature of the molecular species formed on the solid's surfaces. H2S was sorbed even at low pressures, forming a layer of hydroxyls and a half-layer of S; further reaction led to H2O formation and the conversion of the oxide surfaces into sulfide surfaces. SH groups were detected only with MgO. Heating the H2S-treated adsorbents in O2 led to the oxidation of the sulfides to sulfites and to sulfates.

Keywords

Oxidation Sulfate Sulfide Hydroxyl Dolomite 

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References

  1. Anderson, P. J., Horlock, R. F., and Oliver, J. F.: 1965,Trans. Faraday Soc. 61, 2754.Google Scholar
  2. Goodsel, A. J., Low, M. J. D., and Takezawa, N.: 1972,Environ. Sci. Technol. 6, 268.Google Scholar
  3. Lee, P. L., Jacobs, H., and Low, M. J. D.: 1973, in preparation.Google Scholar
  4. Little, L. H.: 1966,Infrared Spectra of Adsorbed Species, Academic Press, New York, pp. 74ff.Google Scholar
  5. Low, M. J. D.: 1960, unpublished results.Google Scholar
  6. Low, M. J. D., Goodsel, A. J., and Takezawa, N.: 1971,Environ. Sci. Technol. 5, 1191.Google Scholar
  7. Low, M. J. D., Jacobs, H., and Takezawa, N.: 1972,Environ. Sci. Technol., in review; 1973, this issue, p. 61.Google Scholar
  8. Squires, A. M.: 1970,Science 169, 821.Google Scholar

Copyright information

© D. Reidel Publishing Company 1973

Authors and Affiliations

  • M. J. D. Low
    • 1
  • P. L. Lee
    • 1
  1. 1.Dept. of ChemistryNew York UniversityNew YorkUSA

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