Canadian Journal of Chemical Engineering, Vol.81, No.1, 80-85, 2003
Thermodynamics and stoichiometry of reactions between hydrogen sulfide and concentrated sulfuric acid
A thermodynamic analysis of the possible reactions between hydrogen sulfide and concentrated sulfuric acid shows that four reactions are feasible. However, only two of these reactions apparently occur in experiments at 1 atm and 0degreesC to 150degreesC. Hydrogen sulfide is first oxidized, by, molecular sulfuric acid, forming SO2, sulfur and water, and then the H2S may react with the dissolved product, SO2, to generate sulfur and water. The, stoichiometry of the consecutive, reactions and their dependence on acid were determined experimentally using mass balance The results of this study suggest a possible alternative method, for sulfur, removal and recovery that, has more advantages.