The Experts below are selected from a list of 150 Experts worldwide ranked by ideXlab platform
Kevin B Jones - One of the best experts on this subject based on the ideXlab platform.
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partitioning of selected trace elements in coal combustion Products from two coal burning power plants in the united states
International Journal of Coal Geology, 2013Co-Authors: Sharon M Swanson, Mark A Engle, Leslie F Ruppert, Ronald H Affolter, Kevin B JonesAbstract:Abstract Samples of feed coal (FC), bottom Ash (BA), economizer fly Ash (EFA), and fly Ash (FA) were collected from power plants in the Central Appalachian basin and Colorado Plateau to determine the partitioning of As, Cr, Hg, Pb, and Se in coal combustion Products (CCPs). The Appalachian plant burns a high-sulfur (about 3.9 wt.%) bituminous coal from the Upper Pennsylvanian Pittsburgh coal bed and operates with electrostatic precipitators (ESPs), with flue gas temperatures of about 163 °C in the ESPs. At this plant, As, Pb, Hg, and Se have the greatest median concentrations in FA samples, compared to BA and EFA. A mass balance (not including the FGD process) suggests that the following percentages of trace elements are captured in FA: As (48%), Cr (58%), Pb (54%), Se (20%), and Hg (2%). The relatively high temperatures of the flue gas in the ESPs and low amounts of unburned C in FA (0.5% loss-on-ignition for FA) may have led to the low amount of Hg captured in FA. The Colorado Plateau plant burns a blend of three low-S (about 0.74 wt.%) bituminous coals from the Upper Cretaceous Fruitland Formation and operates with fabric filters (FFs). Flue gas temperatures in the baghouses are about 104 °C. The elements As, Cr, Pb, Hg, and Se have the greatest median concentrations in the fine-grained fly Ash Product (FAP) produced by cyclone separators, compared to the other CCPs at this plant. The median concentration of Hg in FA (0.0983 ppm) at the Colorado Plateau plant is significantly higher than that for the Appalachian plant (0.0315 ppm); this higher concentration is related to the efficiency of FFs in Hg capture, the relatively low temperatures of flue gas in the baghouses (particularly in downstream compartments), and the amount of unburned C in FA (0.29% loss-on-ignition for FA).
T. Taylor Eighmy - One of the best experts on this subject based on the ideXlab platform.
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PHYSICAL AND ENVIRONMENTAL PROPERTIES OF ASPHALT-AMENDED BOTTOM Ash
Transportation Research Record, 1992Co-Authors: David Gress, Xishun Zhang, Scott M. Tarr, Ingrid Pazienza, T. Taylor EighmyAbstract:A 2-year study is under way to evaluate the physical and chemical properties of the bottom Ash process stream from the 500 tons/day waste-to-energy facility in Concord, New Hampshire. The use of bottom Ash as an aggregate substitute Product in asphaltic base course is envisioned. Research is under way to characterize the time-dependent properties of the bottom Ash for Product acceptance, to develop asphalt concrete mixes with varied percentages of bottom Ash, and to evaluate the leachate release rate characteristics from various asphalt blends using a variety of batch and lysimeter leach tests. Results to date suggest that the bottom Ash Product stream is relatively constant, hot mix formulations meet New Hampshire Department of Transportation specifications, and bitumen is effective in encapsulating bottom Ash and reducing salt leachability.
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Municipal Solid Waste Combustion Ash as an Aggregate Substitute in Asfhaltic Concrete
Studies in Environmental Science, 1991Co-Authors: David Gress, Xishun Zhang, Ingrid Pazienza, S. Tarr, T. Taylor EighmyAbstract:Summary A two year study is underway to evaluate the physical and chemical properties of the bottom Ash process stream from the 500 TPD waste-to-energy facility in Concord, New Hampshire. The use of bottom Ash as an aggregate substitute Product in asphaltic base course is envisioned. Research is underway to characterize the time-dependent properties of the bottom Ash for Product acceptance, to develop both hot mix and cold emulsion formulations, and to evaluate the leachate release rate characteristics from various blends using a variety of batch and lysimeter leach tests. Results to date suggest that the bottom Ash Product stream is relatively constant, hot mix formulations meet State Department of Transportation specifications, and bitumen is effective in encapsulating bottom Ash and reducing salt leachability.
Lucinda L. Hamre - One of the best experts on this subject based on the ideXlab platform.
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Use of Bottom Ash and Fly Ash in Rammed-Earth Construction
1999Co-Authors: B.a. Dockter, Kurt E. Eylands, Lucinda L. HamreAbstract:A demonstration of rammed-earth building construction incorporating coal combustion bottom Ash and fly Ash has been proposed in North Dakota, but several issues related to the environmental and engineering performance of the rammed-earth–Ash Product are under laboratory-scale evaluation at the Energy & Environmental Research Center prior to full-scale demonstration. The work reported was designed specifically to evaluate North Dakota materials, but the procedures used are applicable to materials from any location. Results of a review of the rammedearth technology and an evaluation of market potential for rammed-earth buildings in North Dakota and the region are presented. The procedures for development of a rammed-earth–Ash mix design are detailed. Results of the laboratory-scale assessment of the durability are reported. A comparison of insulating properties of normal rammed earth and rammed earth–Ash are presented. Results of an environmental assessment include information on trace element constituents and radon emanation.
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Use of Bottom Ash and Fly Ash in Rammed-Earth Construction
1999Co-Authors: B.a. Dockter, Kurt E. Eylands, Lucinda L. HamreAbstract:A demonstration of rammed-earth building construction incorporating coal combustion bottom Ash and fly Ash has been proposed in North Dakota, but several issues related to the environmental and engineering performance of the rammed-earth–Ash Product are under laboratory-scale evaluation at the Energy & Environmental Research Center prior to full-scale demonstration. The work reported was designed specifically to evaluate North Dakota materials, but the procedures used are applicable to materials from any location. Results of a review of the rammedearth technology and an evaluation of market potential for rammed-earth buildings in North Dakota and the region are presented. The procedures for development of a rammed-earth–Ash mix design are detailed. Results of the laboratory-scale assessment of the durability are reported. A comparison of insulating properties of normal rammed earth and rammed earth–Ash are presented. Results of an environmental assessment include information on trace element constituents and radon emanation.
Sharon M Swanson - One of the best experts on this subject based on the ideXlab platform.
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partitioning of selected trace elements in coal combustion Products from two coal burning power plants in the united states
International Journal of Coal Geology, 2013Co-Authors: Sharon M Swanson, Mark A Engle, Leslie F Ruppert, Ronald H Affolter, Kevin B JonesAbstract:Abstract Samples of feed coal (FC), bottom Ash (BA), economizer fly Ash (EFA), and fly Ash (FA) were collected from power plants in the Central Appalachian basin and Colorado Plateau to determine the partitioning of As, Cr, Hg, Pb, and Se in coal combustion Products (CCPs). The Appalachian plant burns a high-sulfur (about 3.9 wt.%) bituminous coal from the Upper Pennsylvanian Pittsburgh coal bed and operates with electrostatic precipitators (ESPs), with flue gas temperatures of about 163 °C in the ESPs. At this plant, As, Pb, Hg, and Se have the greatest median concentrations in FA samples, compared to BA and EFA. A mass balance (not including the FGD process) suggests that the following percentages of trace elements are captured in FA: As (48%), Cr (58%), Pb (54%), Se (20%), and Hg (2%). The relatively high temperatures of the flue gas in the ESPs and low amounts of unburned C in FA (0.5% loss-on-ignition for FA) may have led to the low amount of Hg captured in FA. The Colorado Plateau plant burns a blend of three low-S (about 0.74 wt.%) bituminous coals from the Upper Cretaceous Fruitland Formation and operates with fabric filters (FFs). Flue gas temperatures in the baghouses are about 104 °C. The elements As, Cr, Pb, Hg, and Se have the greatest median concentrations in the fine-grained fly Ash Product (FAP) produced by cyclone separators, compared to the other CCPs at this plant. The median concentration of Hg in FA (0.0983 ppm) at the Colorado Plateau plant is significantly higher than that for the Appalachian plant (0.0315 ppm); this higher concentration is related to the efficiency of FFs in Hg capture, the relatively low temperatures of flue gas in the baghouses (particularly in downstream compartments), and the amount of unburned C in FA (0.29% loss-on-ignition for FA).
Brian S. Haynes - One of the best experts on this subject based on the ideXlab platform.
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Deportment and management of metals produced during combustion of CCA-treated timbers
Journal of hazardous materials, 2006Co-Authors: Joseph M. Rogers, M Stewart, Jg Petrie, Brian S. HaynesAbstract:Abstract Experiments were conducted to study CCA-treated wood combustion over a range of temperature and oxygen concentrations with a view to understanding the factors affecting energy and metals recovery from waste treated timber. CCA-treated wood was burned in a furnace at temperatures from 400 to 940 °C and oxygen concentrations between 5 and 21%. The Ash and condensed volatiles were digested for total concentrations of metals and subjected to leaching tests to determine the stabilized concentrations of metals. Arsenic volatilisation increased with increasing furnace temperature whereas the copper and chromium reported mainly to the Ash Product. The effect of oxygen concentration was weak although it appeared that more arsenic volatilises at higher oxygen concentrations. However, a larger proportion of the arsenic in the Ash generated at lower oxygen concentrations is solubilised during leaching tests, with the result that the concentration of stabilized arsenic in the Ash is relatively unaffected by oxygen concentration.
