EPRI SCR Pilot Program at TVA`s Shawnee Power Station. Final report
This report contains the results of a four-year test program to evaluate the high-dust selective catalytic reduction (SCR) process operating on a high-sulfur coal-fired boiler. The project was sponsored by the Electric Power Research Institute (EPRI) and the Tennessee Valley Authority (TVA), and testing was conducted on a pilot unit installed at TVA`s National Center for Emissions Research located at the Shawnee Power Plant near Paducah, Kentucky. The catalysts used in pilot unit were supplied by Kawasaki Heavy Industries, LTD. (represented in the US by Joy Environmental Technologies) and the Norton Chemical Process Products Corporation. The primary objectives of the test program were to identify operating issues and establish the feasibility of SCR on high-sulfur US coals. Unit 9 at Shawnee burned coals with sulfur concentrations between 2.5 and 5.0 percent, and the catalysts in the pilot unit were exposed to the high-sulfur flue gas for up to 22,000 hours. During this period, tests were conducted to monitor changes in NO. removal and residual ammonia (slip) with increasing exposure time. Additional testing, including measurements of gas-phase SO{sub 2} and SO{sub 3}, Was conducted to determine SO{sub 2} oxidation rates over the catalysts and monitor other pilot unit performance characteristics. Catalyst coupon samples were periodically removed from the reactor and analyzed by the suppliers for catalytic activity and for other chemical and physical properties. The test program represented a severe test for SCR. Test results indicate that the higher sulfur content of coals tested during the program contributed to catalyst channel plugging, accelerated catalyst deactivation, and a greater potential for balance-of-plant operating problems. Even so, the results demonstrated that SCR is feasible for boilers burning higher-sulfur coal, as long as these risks are considered during system design.
- Research Organization:
- Electric Power Research Inst. (EPRI), Palo Alto, CA (United States); Radian Corp., Austin, TX (United States)
- Sponsoring Organization:
- Electric Power Research Inst., Palo Alto, CA (United States)
- OSTI ID:
- 108215
- Report Number(s):
- EPRI-TR-105550
- Resource Relation:
- Other Information: PBD: Aug 1995
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
54 ENVIRONMENTAL SCIENCES
FOSSIL-FUEL POWER PLANTS
FLUE GAS
DENITRIFICATION
NITROGEN OXIDES
SELECTIVE CATALYTIC REDUCTION
COAL
SULFUR CONTENT
AIR POLLUTION CONTROL
CATALYSTS
AMMONIA
SULFUR DIOXIDE
SULFUR TRIOXIDE
DEACTIVATION
EXPERIMENTAL DATA