CHARACTERIZATION OF REACTION BETWEEN ZINC-OXIDE AND HYDROGEN-SULFIDE

The reaction between zinc oxide and hydrogen sulfide was studied in th e presence of coal-derived gases. The reaction was inhibited by the pr esence of H2O. The effect of CO2 on the reaction was smaller than that of H2O. H-2 accelerated the reaction at 500 degrees C and inhibited i t at 400 degrees C in the presence of H2O. CO also inhibited the react ion in the presence of H2O. COS was formed from H2S and CO in the abse nce of H-2. Elemental sulfur was formed from COS only under the H2S-N- 2 system. In explanation of the experimental results, a reaction schem e has been presented.