Record Display for the EPA National Library Catalog


Main Title Reaction of H2S and Sulfur with Limestone Particles.
Author Borgwardt, R. H. ; Roache, N. F. ;
CORP Author Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab. ;Northrop Environmental Services, Inc., Research Triangle Park, NC.
Year Published 1984
Report Number EPA/600/J-84/300;
Stock Number PB85-203180
Additional Subjects Hydrogen sulfide ; Sulfur ; Lime stone ; Air pollution control ; Displacement reactions ; Chemical reactions ; Combustion products ; Industrial wastes ; Electric power plants ; Temperature ; Burners ; Reaction kinetics ; Activation energy ; Particle size ; Reprints ; Chemical reaction mechanisms ; Limestone injection multistage burners ; Coal fired power plants
Library Call Number Additional Info Location Last
NTIS  PB85-203180 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 8p
The paper gives results of a study of the direct-displacement reaction of limestone with hydrogen sulfide (H2S) over the temperature range 570-850 C in a differential reactor. It is one of several possible mechanisms of sulfur capture in limestone-injection multistage burners which are being developed to minimize pollution from coal combustion. Measurements with particles ranging in size from 1.6 to 100 micrometers showed that the reaction rate is proportional to the superficial surface area of the limestone. The reaction is inhibited by H2 and CaCl2. Sintering og CaCO3, dissociation of H2S, and product layer diffusion limit the rate of CaS formation at temperatures above 750 C. Limestone also reacts with elemental sulfur, but the rate and activation energy are significantly lower than those of the H2S reaction.