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Agricultural By-products as Mercury Adsorbents in Gas Applications
- Increased emphasis on reduction of mercury emissions from coal fired electric power plants have resulted in environmental regulations that may in the future require application of activated carbons as mercury sorbents. The sorbents could be injected into the flue gas stream where it adsorbs the mercury. The sorbent (now containing mercury) would be removed via filtration or other means from the flue gas. Our preliminary work has demonstrated that activated carbon made from agricultural animal waste material can adsorb mercury from air with great efficiency. In experiments, the manure-based activated carbon removed over 95% of elemental mercury from air streams both in its granular and powder forms when used at room temperatures. At elevated temperatures, the adsorption capability diminished but could be improved via chloride impregnation. A commercial activated carbon product tested in similar experiments did not perform as well as the manure-based product.
Klasson, K. Thomas , Boihem, Larry L. Jr. , Lima, Isabel M. , Marshall, Wayne E.
animal manures , pyrolysis , activated carbon , adsorbents , adsorption , mercury , pollution control , air , gas emissions , coal , burning , byproducts , power plants , filtration , animal manure management , waste utilization , powders , air pollution
- Includes references
Journal Articles, USDA Authors, Peer-Reviewed
- Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.