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NARSTO Workshop on Innovative Methods for Emission Inventory Development and Evaluation University of Texas, Austin October 14-17, 2003 |
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Development Of An Integrated Emission Profile For A Coke Facility With Fence-line Measurements Using Highly-time-resolved Instruments
Allen L Robinson, Emily Wietkamp, Eric Lipsky
Department of Mechanical Engineering
Carnegie Mellon University, Pittsburgh, PA, 15213
Patrick Pancras, John OndovUniversity of Maryland
Highly time-resolved ambient measurements create the opportunity to develop integrated emission profiles for industrial facilities with a large number of emission points that are difficult to characterize using traditional source sampling techniques. To illustrate this approach and to update emission profiles for important sources in the Pittsburgh region, a suite of continuous and integrated measurements was made at both a fenceline site adjacent to coke production facility and a background site. Continuous measurements included meteorological data, CO, SO2, NOx, NO, PM2.5 mass, and particle size distributions from 3 nm to 1 mm. A combination of meteorological data and pollutant measurements at the fenceline and background sites were used to determine when the coke plant plume was impacting the fenceline site. For example, ratios of SO2 at the fenceline sampling site to the background site as large as 25 are observed when the fenceline site is in the plume. Semi-continuous measurements of OC/EC (2 hr resolution) and trace metals (30 minute resolution) were made to obtain highly time-resolved composition data. The plume contains greatly elevated OC/EC concentrations; for example, ratios of peak plume OC and EC concentrations to the background site were 18 and 48, respectively. The plume also contains greatly elevated metals concentrations; for example ratios of peak plume Se levels to the background were often greater than a factor of 8. Reasonable agreement is observed between the fenceline measurement and the stated plant emissions for NOx, SOx, and PM2.5. The following integrated emission profile was developed for the coke facility (expressed as % PM2.5 mass): OC 27.39; EC 16.78; Al 0.4427; As 0.0381; Cd 0.0010; Cr 0.0025; Cu 0.0205; Ni 0.0020; Mn 0.0304; Fe 0.2959; Pb 0.0740; Se 0.0283; and Zn 0.1101.