The EPA refers to activated carbon as “the most successfully demonstrated mercury-specific control technology” that also has minimal installation requirements. Within this industry, bromine and other halogens are typically applied to the activated carbon to enhance mercury oxidation and capture. However, the corrosive nature of these additives has the potential to cause larger issues for power plants with extended use. Carbonxt testing with carbon tailoring and alternative additives have shown to achieve the same or better performance results while maintaining the integrity of the plant. Recent full-scale tests have been conducted that include a span of coal and boiler types, injection location/particulate control configurations, injection rates, and concentration of SO3 (inherent and injected for flue-gas conditioning). This presentation will review the mercury control performance and operational impacts, including particle emissions and fly ash utilization, of these recent test events.
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