FIELD TEST OF AMMONIA COLLECTION/ANAL’r’SIS METHOD Prepared for: R. Dishakjian Office of Air Quality Planning and Standards
نویسندگان
چکیده
Addition of ammonia or urea to the combustion zone of a boiler has been shown to reduce the formation (and thus emissions) of oxides of nitrogen. However, under certain conditions, some of the ammonia will “slip” by and may be emitted to the atmosphere. Several states are interested in monitoring such ammonia “slip” emissions and other sources of ammonia. Industries are interested in using ammonia emissions data to guide them in optimizing the ammonia injection technology. However, no EPAapproved measurement method has been available. This report gives information on results from a field test of a wet chemistry method for collection and analysis of ammonia at a coal-fired power plant. In the method, stack gases are sampled isokinetically, pulled through an in-stack filter, and bubbled through 0.1 N sulfuric acid impinger solution to trap the ammonia as ammonium ion. The ammonium ion is quantified by ion chromatography. From this analytical result and the measured total volume of the sample, the stack gas ammonia concentration can be calculated. The method was found to be acceptable per EPA Method 301 specifications if a correction factor is applied. This report is submitted in fulfillment of U.S. Environmental Protection Agency Contract No. 68-D2-0 163, Task No. 211, by Research Triangle Institute and Entropy, Incorporated.
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