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


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.


Oxidation Sulfate Sulfide Hydroxyl Dolomite 
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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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