FUEL 92 |
| Kevin M. Fisher, Scott McLaren Sr., Trevor Ley, and Rick Slye. Apogee Scientific, Inc, 2895 W. Oxford Ave, Suite 1, Englewood, CO 80110 |
| Several Hg analyzers are commercially available that can measure elemental mercury at typical concentrations found in coal combustion flue gas (1-20 mg/Nm3). For total vapor-phase mercury measurements, most of the analyzers must convert the non-elemental mercury to elemental mercury for measurement using the distinct lines of florescence or ultraviolet (UV) absorption characteristic of elemental Hg. The analyzers are capable of identifying the species of mercury by removing the non-elemental forms prior to measurement. Unfortunately, no analyzer and sample conditioning assembly has demonstrated the ability to continuously and accurately measure mercury over long periods without significant operator interface in the harsh coal-fired flue gas environment since they are affected by one or more of the flue gas constituents. Through EPA and EPRI funding, Apogee Scientific, Inc. is conducting a program to define a new state-of-the-art mercury measurement system by developing a novel sample conditioning system (SCS) that is not wet-chemistry based for the continuous real-time monitoring of mercury in flue gas from coal-fired utility boilers. The proposed SCS will provide a method to use an analyzer such as a CVAAS or CVAFS to measure total vapor-phase mercury, elemental mercury, and total mercury (vapor plus particulate) in real-time. This paper will present results from extensive field trials using the novel SCS. Long-term evaluations of the SCS system and results of the analyzer evaluated using procedures described in the EPA Draft performance Specification 12 will be presented. |
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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 |