FUEL 90 |
| Loreal V. Heebink and David J. Hassett. Energy & Environmental Research Center, University of North Dakota, 15 North 23rd Street, Grand Forks, ND 58203 |
| As control technologies reduce the air emissions of mercury from power plants, the amount of mercury in coal combustion by-products (CCBs) will likely increase. This poses a critical question: Will the mercury removed from the flue gas really be removed from the environment or will it be relocated and released later? Researchers at the Energy & Environmental Research Center have investigated the potential for the rerelease of mercury from CCBs under a variety of conditions in an effort to address various ash management scenarios. Work is ongoing under four conditions, including leaching, long-term ambient-temperature vapor release, microbiologically mediated vapor release, and high-temperature thermal release up to 700 °C. Results to date indicate little to no rerelease of mercury through leaching or through ambient-temperature vapor transport. Current investigations are focused on CCBs resulting from the use of mercury control technologies to determine whether the potential for mercury release will increase. |
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Mercury Measurement, Transformations, Control, and Related Issues in Power Systems
1:00 PM-4:50 PM, Monday, March 29, 2004 Marriott -- Gold Key II, Oral
Division of Fuel Chemistry |