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Main Title Reaction of Hydrogen Sulfide with Fully Calcined Dolomite.
Author Pel, Melvyn ;
CORP Author City Coll., New York. Dept. of Chemical Engineering.
Year Published 1971
Report Number EPA-AP-00945;
Stock Number PB-230 046
Additional Subjects Hydrogen sulfide ; Dolomite(Mineral) ; Calcium oxides ; Magnesium oxides ; Chemisorption ;
Library Call Number Additional Info Location Last
NTIS  PB-230 046 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 227p
Calcined dolomite is a candidate acceptor for H2S in processes for gasifying or pyrolyzing sulfurous fuels, such as coal and residual oil, to provide sulfur-free fuels for use in power stations. Differential kinetic data are given for the reaction (CaO+MgO) + H2S = (Cas+MgO) + H2O between 475 and 900C at H2S partial pressures between 0.003 and 0.2 atmospheres. The main features of data obtained for a powder appear to be explained by the assumption that activated adsorption of H2S by unreacted CaO hinders the rate, the adsorption being in general not at equilibrium. An expression for the rate appears to require at least three kinetic constants: an adsorption rate constant, a desorption rate constant, and a reaction rate constant. The activation energy of the reation kinetic constant is estimated. Some effects of steam concentration, hydrogen concentration, and sintering on the activity of calcined dolomite are discussed. (Modified author abstract)