||Effect of Sampling Temperature, Filter Material, and Sample Treatment on Combustion Source Emission Test Results.
Mitchell, W. J. ;
Bruffey, C. L. ;
||Environmental Monitoring Systems Lab., Research Triangle Park, NC. Quality Assurance Div. ;PEDCo-Environmental, Inc., Cincinnati, OH.
Air pollution control equipment ;
Electrostatic precipitators ;
Industrial wastes ;
Combustion products ;
Sulfuric acid ;
Sulfur dioxide ;
Coal fired power plants ;
Air pollution sampling ;
EPA method 8 ;
EPA method 5
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||Particulate testing was performed at scrubber-equipped and ESP-equipped, coalfired power plants. The particulate collecting portion of each train was followed by an EPA Method 8 train to determine the amount of sulfuric acid mist and sulfur dioxide that passed through the particulate filter. Significant quantities of a volatile sulfate were found in the Method 5 particulate sample even when the probe and filter were maintained at a temperature 30 C above the acid dewpoint. It was also found that: (1) Heating the collected sample at temperatures above the sampling temperature would effectively remove this material from the ESP-equipped plant samples, but not from the scrubber-equipped plant samples; (2) At the ESP-equipped plant, the Alundum thimble particulate results were equivalent to Method 5, but at the scrubber-equipped plant were considerably higher; (3) At both sources, borosilicate glass-fiber thimble filters gave average particulate results that were considerably higher than Method 5 and would not release most of this excess weight when heated to 316 C; and (4) A combination Method 5/Method 8 train cannot be used to simultaneously measure particulate and sulfuric acid at these sources unless the probe and filter are operated at a temperature much higher than the 160 C now specified by regulation.
||Prepared in cooperation with PEDCo-Environmental, Inc., Cincinnati, OH.
||Pub. in Environmental Science and Technology, v18 n10 p803-808 Oct 84.
|NTIS Title Notes
||Reprint: Effect of Sampling Temperature, Filter Material, and Sample Treatment on Combustion Source Emission Test Results.
|PUB Date Free Form
||13B; 68A; 97R
||Not available NTIS