Measurement of alkali-vapor emission from pressurized fluidized-bed combustion of Illinois coals
- Argonne National Lab., IL (United States)
- Illinois Clean Coal Inst., Carterville, IL (United States)
Two Illinois Herrin No. 6 coals and one Illinois Springfield No. 5 coal were separately combusted in a laboratory-scale (15-cm dia) pressurized fluidized-bed combustor (PFBC) combined with an alkali sorber. These coals were combusted in a fluidized bed of Tymochtee dolomite at temperatures ranging from 910 to 950[degree]C and a system pressure of 9.2 atm absolute. Alkali-vapor emission (Na and K) in the PFBC flue gas was determined by the analytical activated-bauxite sorber bed technique developed at Argonne National Laboratory. The test results showed that sodium is the major alkali-vapor species present in the PFBC flue gas, and that the level of sodium-vapor emission increases linearly with both Na and Cl contents in the coals. This suggests that the sodium-vapor emission results from direct vaporization of NaCl present in the coals. The measured alkali-vapor concentration (Na + K), 67 to 190 ppbW, is more than 2.5 times greater than the allowable alkali limit of 24 ppb for an industrial gas turbine. Combusting these coals in a PFBC for power generation may require developing a method to control alkali vapors.
- Research Organization:
- Argonne National Lab., IL (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 6869356
- Report Number(s):
- ANL/CMT/CP-76154; CONF-930521-6; ON: DE93010660
- Resource Relation:
- Conference: 12. international conference on fluidized-bed combustion, San Diego, CA (United States), 8-13 May 1993
- Country of Publication:
- United States
- Language:
- English
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Alkali-vapor emission from PFBC of Illinois coals.
Measurement of alkali vapor concentration in the PFBC (pressurized fluidized-bed combustion) flue gas
Related Subjects
ALKALI METAL COMPOUNDS
VAPORS
BAUXITE
SORPTIVE PROPERTIES
COAL
FLUIDIZED-BED COMBUSTION
ADSORPTION
EMISSION
GAS TURBINES
ILLINOIS
NUMERICAL DATA
PRESSURIZATION
SODIUM CHLORIDES
SPECIFICATIONS
ALUMINIUM ORES
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
COMBUSTION
DATA
DEVELOPED COUNTRIES
ENERGY SOURCES
EQUIPMENT
FLUIDS
FOSSIL FUELS
FUELS
GASES
HALIDES
HALOGEN COMPOUNDS
INFORMATION
MACHINERY
MATERIALS
NORTH AMERICA
ORES
OXIDATION
SODIUM COMPOUNDS
SORPTION
SURFACE PROPERTIES
THERMOCHEMICAL PROCESSES
TURBINES
TURBOMACHINERY
USA
014000* - Coal
Lignite
& Peat- Combustion