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SELECTIVE CATALYTIC REDUCTION MERCURY FIELD SAMPLING PROJECT
Laudal, D. L. SELECTIVE CATALYTIC REDUCTION MERCURY FIELD SAMPLING PROJECT. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-04/147, 2004.
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A lack of data still exists as to the effect of selective catalytic reduction (SCR), selective noncatalytic reduction (SNCR), and flue gas conditioning on the speciation and removal of mercury (Hg) at power plants. This project investigates the impact that SCR, SNCR, and flue gas-conditioning systems have on total and speciated Hg emissions. If SCR or SNCR systems enhance Hg conversion or capture, then they could be thought of as multipollutant control technologies.
Twelve power plants were chosen for full-scale sampling to investigate the role that SCR, SNCR, flue gas conditioning, and coal blending have on Hg speciation. The results indicate that SCR can assist in converting elemental Hg to oxidized Hg. However, the effect appears to be coal-specific and, possibly, catalyst specific. NH3, whether injected directly as a gas or indirectly as urea, did not appear to have a significant effect on Hg speciation and removal.
URLs/Downloads:SELECTIVE CATALYTIC REDUCTION MERCURY FIELD SAMPLING PROJECT (PDF,NA pp, 1669 KB, about PDF)
Record Details:Record Type: DOCUMENT (PUBLISHED REPORT/REPORT)
Organization:U.S. ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF RESEARCH AND DEVELOPMENT
NATIONAL RISK MANAGEMENT RESEARCH LABORATORY
AIR POLLUTION PREVENTION AND CONTROL DIVISION
AIR POLLUTION TECHNOLOGY BRANCH