Hydrogen sulfide oxidation test program

This paper summarizes the results of a project carried out for the California Department of Water Resources (DWR) by Bechtel at The Geysers area to field test the oxidation of hydrogen sulfide (H/sub 2/S) in geothermal steam condensate using hydrogen peroxide. The objective was to find the oxidant-catalyst combination that will remove sufficient sulfide to allow power plant operation without violating air pollution H/sub 2/S emission standards. Batch screening tests, bench scale flow tests, and pilot plant flow tests were made on condensed steam from one of the wells that will supply the DWR Bottle Rock power plant. The effects of treatment ratio, pH, catalyst, residence time, and temperature were tested. Based on the test results, a conceptual design was prepared for a recommended abatement system for the power plant.