Retention of mercury by low-cost sorbents: Influence of flue gas composition and fly ash occurrence
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Bench- and Pilot-Scale Studies on Mercury Removal by Potassium Iodide in Coal-Fired Flue Gas
Mercury (Hg) is a toxic air pollutant with coal-fired utility plants being the largest anthropogenic Hg emission source in the United States. The extent that Hg can be removed from power plants using conventional air pollution control devices (APCDs) is significantly affected by Hg speciation in flue gas. Oxidized Hg (Hg) is preferable to elemental Hg (Hg) in that Hg is less volatile and solubl...
متن کاملEnhancement of mercury capture by the simultaneous addition of hydrogen bromide (HBr) and fly ashes in a slipstream facility.
Low halogen content in tested Powder River Basin (PRB) coals and low loss of ignition content (LOI) in PRB-derived fly ash were likely responsible for higher elemental mercury content (averaging about 75%) in the flue gas and also lower mercury capture efficiency by electrostatic precipitator (ESP) and wet-FGD. To develop a cost-effective approach to mercury capture in a full-scale coal-fired u...
متن کاملCatm Annual Report Listing of Catm Projects
Project Description The EERC is performing fundamental research to understand mechanisms responsible for conversion of mercury to other chemical species within combustion and gasification flue gas. This research is imperative for development and validation of improved mercury emission measurement, monitoring, and control. Several tasks are devoted to understanding mercury transformations. Unbur...
متن کاملDelveloment and Evaluation of Non-carbon Sorbents
Executive Summary Western Research Institute (WRI) and its cosponsor Novinda Corporation (the Company was originally known as Amended Silicates, Inc.) proposed the development, characterization and testing of sorbents based on clay deposits abundant in Wyoming for the in-flight capture of mercury in pulverized coal derived flue gasses. As a part of the State of Wyoming’s Clean Coal Technologies...
متن کاملDevelopment of a mercury transformation model in coal combustion flue gas.
A bench-scale entrained-flow reactor was used to extract flue gas produced by burning a subbituminous Belle Ayr coal in a 580-MJ/h combustion system. The reactor was operated at 400 degrees, 275 degrees, and 150 degrees C with a flow rate corresponding to residence times of 0-7 s. Transformations of elemental mercury (Hg0) and total gas mercury (Hg(gas)) in the reactor were evaluated as functio...
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تاریخ انتشار 2013