Control of Volatile Organic Compounds Emissions from Manufacturing

3. Test Results - VOC destruction efficienc,~ was determined at
two different temperatures. Table D-6 provides a summary of these
test results. Efficiency was found to increase with temperature. At
(800°C) 1475"F, the efficiency was well above 99 percent. These tests
were, again, for residence times greater than 0.75 second. However,
theoretical calculations show that even greater ef'f iciency would be
achieved at 870°C (1600°F) and 0.75 second than at the longer residence
times but lower temperatures represented in these tests.
A1 1 actual measurements were made as parts
propane with the other units reported derived fr
values. The values were measured by digital integration.
The incinerator combustion temperature for the first six runs was
about 630°C (1160°F). Runs 7 through 9 were made at an incinerator
temperature of about 800°C (1475°F). Only during Run 3 was the acrolein
process operating. The higher temperature caused most of the compounds
heavier than propane to drop below the detection limit due to the wide
range of attenuations used, nearby obscuring peaks, and base1 ine noise
variations. The detection 1 imit ranges from about 10 parts per bill i ~ n
(ppb) to 10 ppm, generally increasing during the chromatogram, and
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especially near 1 arge peaks. Several of the mi nor peaks were di ff icul t
to measure. However, the compounds of interest, methane, ethane,
ethylene, propane, propylene, acetal dehyde, acetone, acrol ein, and
acrylic a&d, dominate the chromatograms.
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detected Sn any sample.
Only &tic"acid bas never
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The probable reason for negative destruction efficiencies for
several light components is generation by pyr om other com~on~ents
For instance, the primary pyrolysis products of acrolein are carbon
monoxide and ethylene. Except for methane and, to a much lesser
extent, ethane and propane, the fuel gas cannot contribute hydrocarbons
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to the outlet samples.
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A sample taken from the inlet line knockout trap showed 6 mg/g of
acetaldehyde, 25 mg/g of butenes, and 100 mg/g of acetone when analyzed
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by gas chromatography/flame ionization detection (GC/FID) .
0.2.3 Chemical Company Air Oxidation Unit Test D i 3
These data are from tests performed by chemical companies on
incinerators at two air oxidation units: the Petro-Tex oxidative
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