(CN)– The Environmental Protection Agency is standing by its decision to require power plants to cut emissions and other air pollutants, to comply with the Clean Air Act.
The EPA on Friday issued a final that it is “appropriate and necessary to regulate hazardous air pollutants from coal- and oil-fired power electric utility” across the United States. The EPA said the benefits…”
Abstract: “The U.S. Environmental Protection Agency (EPA) and World Health Organization (WHO) along with several published reports have identified mercury as a hazardous air pollutant leading to the EPA establishing Mercury and Air Toxics Standards (MATS) for coal-fired electricity generating units (EGUs) that take effect in 2015. Currently over 50% of the existing coal-fired EGUs based on capacity utilize wet flue gas desulfurization systems (WFGDs) to reduce sulfur dioxide emissions. WFGDs represent existing air quality control devices (AQCDs) that as part of a mercury emissions control strategy, can facilitate EGU mercury compliance.
This white paper focuses on EGUs that contain WFGDs and their utilization as part of a MATS mercury compliance strategy. In particular, our focus is limited to wet-scrubbed units with highly oxidized mercury flue gas entering the WFGD that are not attaining or are only marginally attaining mercury emission limitations.”
With the introduction of the first national standards for mercury pollution from power plants in December of 2011, many facilities will turn to activated carbon injection to meet the regulatory demands. Activated carbon injection is a mature technology that is widely available and proven for achieving mercury removal greater than 90%. In anticipation of the need, Carbonxt has developed powdered activated carbon for mercury removal from coal-fired power plant flue gas. This product stands apart from most available mercury control sorbents in that is it non-halogenated. The Carbonxt product has been tested using full-scale activated carbon injection studies under various conditions. The testing includes 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.