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. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 10145593
- 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),9-13 May 1993; Other Information: PBD: [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