Measurement of alkali vapor concentration in the PFBC (pressurized fluidized-bed combustion) flue gas

Conference · Sun Jan 01 00:00:00 EST 1989

OSTI ID:6419917

Lee, S H.D.; Carls, E L

A laboratory-scale PFBC/alkali sorber unit has been used to measure the level of vapor-phase alkali in PFBC (9.2 atm absolute) flue gas. Prior to sampling with a hot (850--900/degree/C) stainless steel tube for alkali analysis, the flue gas was cleaned of particulates by use of a hot cyclone and SiC candle filters. The alkali emission from two different coal-sorbent combustions were determined. In the combustion of Pittsburgh Sewickley seam coal and Tymochtee dolomite at average bed temperatures of 900--925/degree/C, the alkali vapor concentration (Na + K) was measured by an Ames real-time, on-line alkali analyzer to be >50 ppbW in the PFBC flue gas. In the combustion of Beulah lignite of North Dakota and Tymochtee dolomite at average bed temperatures of 850--875/degree/C, the average sodium vapor concentration in the PFBC flue gas was measured to be 1.42, 1.51, and 1.31 ppmW by a newly developed analytical alkali sorber beds of activated bauxite (two beds) and diatomaceous earth, respectively. Based on these measurements, the average sodium vapor concentration of 1.3-1.5 ppmW in the PFBC flue gas of Beulah lignite is more than 1.5 orders of magnitude greater than the currently suggested alkali specification limit (0.024 ppm) for an industrial gas turbine. 15 refs., 7 figs., 2 tabs.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6419917
• Report Number(s): CONF-890402-2; ON: DE89005889
• Resource Relation: Conference: 10. international conference on fluidized-bed combustion, San Francisco, CA, USA, 30 Apr 1989; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
01 COAL, LIGNITE, AND PEAT
FLUE GAS
CHEMICAL ANALYSIS
ADSORPTION
ALKALI METAL COMPOUNDS
BAUXITE
CORROSION
DIATOMACEOUS EARTH
EFFICIENCY
FLUIDIZED-BED COMBUSTION
GAS TURBINES
LIGNITE
MEASURING INSTRUMENTS
REMOVAL
SAMPLING
STAINLESS STEEL-304
VAPORS
ALLOYS
ALUMINIUM ORES
AUSTENITIC STEELS
BROWN COAL
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM-NICKEL STEELS
COAL
COMBUSTION
CORROSION RESISTANT ALLOYS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
GASEOUS WASTES
GASES
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HIGH ALLOY STEELS
IRON ALLOYS
IRON BASE ALLOYS
MACHINERY
MATERIALS
NICKEL ALLOYS
ORES
OXIDATION
SORPTION
STAINLESS STEELS
STEEL-CR19NI10
STEELS
THERMOCHEMICAL PROCESSES
TURBINES
TURBOMACHINERY
WASTES
200202* - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions
010800 - Coal
Lignite
& Peat- Waste Management