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 EnviroScrub’s Pahlman™ Process Removes 99% of Elemental Mercury at Minnesota Power’s Boswell Energy Center 8 March, 2004 Minneapolis, Minnesota In testing trials jointly sponsored by the U.S. Department of Energy’s (DOE’s) National Energy Technology Laboratory, Minnesota Power, and EnviroScrub Technologies Corporation (EnviroScrub), EnviroScrub’s Pahlman™ Process Multi-Pollutant Control (MPC) Technology removed 99% of elemental mercury. The Energy & Environmental Research Center (EERC) of the University of North Dakota conducted the independent third-party validation testing. In addition to measuring industry-leading levels of elemental mercury removal, the test results documented simultaneous removal of up to 94% of total mercury, 99% of SO2, and 96% of NOx. Previous testing of EnviroScrub’s Pahlman™ Process at DTE Energy’s River Rouge Power Plant in June, 2003, showed removal of up to 80% of total mercury and 97% oxidized mercury, with simultaneous removal of up to 98% of NOx and near 100% of SO2. However, since no elemental mercury was present in the gas stream at River Rouge, EnviroScrub arranged additional testing at the Boswell Energy Center, a facility with higher levels of elemental mercury to more completely document mercury removal rates. A slipstream of Minnesota Power’s Unit #4, a 570 MW boiler operating on sub-bituminous Powder River Basin (PRB) coal, was diverted from the main exhaust duct and routed to EnviroScrub’s Mobile Pilot Unit for target pollutant removal. The testing was conducted with simultaneous inlet and outlet sampling from EnviroScrub’s Pilot Unit using both the EPA-approved Ontario Hydro (OH) method as well as a mercury semi-continuous emission monitor (Hg SCEM’s). “With third-party verification of the Pahlman™ Process’ ability to simultaneously remove 99% elemental mercury, 94% total mercury, 99% SO2, and 96% NOx, EnviroScrub now removes more kinds of EPA-regulated pollutants at higher removal percentages than any other Multi-Pollutant Control Technology out there,” commented Richard M. Boren, EnviroScrub's Director of Emissions and Environmental Operations. Pahlman™ Process Technology achieves these exceptional capture percentages using a single-stage, dry system, which can essentially replace three separate Emissions Reduction Technology (ERT) systems -- wet FGD SOx-scrubbing, SCR for NOx-scrubbing, and Activated Carbon injection for mercury-reduction. The outstanding capture percentages coupled with the single-stage capabilities of the system further improve the already competitive Capital and Operating & Maintenance cost structure of the Pahlman™ Process Technology as compared to the standard alternatives of wet FGD, SCR, and Activated Carbon systems. The Pahlman™ Process can save power generation companies tens of millions of dollars in Emissions Reduction Technology costs at a single coal-fired power generation plant. EnviroScrub, a privately-held deployment-stage company based in Minneapolis, Minnesota, licenses its patented and proprietary dry Pahlman™ Process NOx / SOx / Hg / PM 2.5 / HCl / H2S scrubbing technology to power generation and industrial plants worldwide. EnviroScrub plans to compete in the multi-billion dollar U.S. Emissions Reduction Technology market with its first commercial-scale projects in late-2004. For more information, contact: EnviroScrub Technologies Corporation Back to News |
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