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Title: Measurement of alkali vapors in PFBC exhaust. Final report

Abstract

Under the auspices of the US Department of Energy through Morgantown Energy Technology Center, laboratory-scale studies were conducted to develop a regenerable activated-bauxite adsorbent (RABA) for use in an in situ regenerable activated-bauxite sorber alkali monitor (RABSAM). The RABSAM is a sampling probe that does not require a high-temperature/high-pressure sampling line for reliable measurement of alkali vapor in the exhaust of pressurized fluidized-bed combustor (PFBC). The RABA can be generated from the commercial grade activated bauxite by deactivating (or reacting) clay impurities in activated bauxite with NaCl or LiCl vapor. Under the atmospheric deactivation process, however, only a partial deactivation of clay impurities is achieved, probably due to limited access of NaCl or LiCl vapor into micropores of activated bauxite. Because LiCl vapor chemically reacts with alumina substrate of activated bauxite, resulting in pore enlargement, loss of pore surface area, and a decrease in the subsequent NaCl-vapor sorption capacity of the RABA, NaCl is a more suitable deactivation agent than LiCl vapor. In a simulated PFBC exhaust environment, the RABA behaves similarly to fresh activated bauxite in capturing NaCl vapor from the simulated PFBC exhaust. Based on results of this work, we recommend generating chemically and thermally stable RABA bymore » deactivating clay impurities of commercial grade activated bauxite with NaCl or KCl vapor under simulated PFBC exhaust environment, that is, high-temperature, high-pressure, and high concentrations of NaCl or KCl vapor in simulated PFBC exhaust compositions.« less

Authors:
;
Publication Date:
Research Org.:
Argonne National Lab., IL (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10148110
Report Number(s):
ANL/FE-94-01
ON: DE94011326
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Jan 1994
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; 01 COAL, LIGNITE, AND PEAT; COAL; FLUIDIZED-BED COMBUSTION; FLUIDIZED-BED COMBUSTORS; COMBUSTION PRODUCTS; ALKALI METAL COMPOUNDS; MEASURING METHODS; PRESSURIZATION; BAUXITE; CHEMICAL ACTIVATION; CLAYS; SODIUM CHLORIDES; PROGRESS REPORT; VAPORS; MONITORING; 440800; 014000; MISCELLANEOUS INSTRUMENTATION; COMBUSTION

Citation Formats

Lee, S H.D., and Swift, W M. Measurement of alkali vapors in PFBC exhaust. Final report. United States: N. p., 1994. Web. doi:10.2172/10148110.
Lee, S H.D., & Swift, W M. Measurement of alkali vapors in PFBC exhaust. Final report. United States. https://doi.org/10.2172/10148110
Lee, S H.D., and Swift, W M. 1994. "Measurement of alkali vapors in PFBC exhaust. Final report". United States. https://doi.org/10.2172/10148110. https://www.osti.gov/servlets/purl/10148110.
@article{osti_10148110,
title = {Measurement of alkali vapors in PFBC exhaust. Final report},
author = {Lee, S H.D. and Swift, W M},
abstractNote = {Under the auspices of the US Department of Energy through Morgantown Energy Technology Center, laboratory-scale studies were conducted to develop a regenerable activated-bauxite adsorbent (RABA) for use in an in situ regenerable activated-bauxite sorber alkali monitor (RABSAM). The RABSAM is a sampling probe that does not require a high-temperature/high-pressure sampling line for reliable measurement of alkali vapor in the exhaust of pressurized fluidized-bed combustor (PFBC). The RABA can be generated from the commercial grade activated bauxite by deactivating (or reacting) clay impurities in activated bauxite with NaCl or LiCl vapor. Under the atmospheric deactivation process, however, only a partial deactivation of clay impurities is achieved, probably due to limited access of NaCl or LiCl vapor into micropores of activated bauxite. Because LiCl vapor chemically reacts with alumina substrate of activated bauxite, resulting in pore enlargement, loss of pore surface area, and a decrease in the subsequent NaCl-vapor sorption capacity of the RABA, NaCl is a more suitable deactivation agent than LiCl vapor. In a simulated PFBC exhaust environment, the RABA behaves similarly to fresh activated bauxite in capturing NaCl vapor from the simulated PFBC exhaust. Based on results of this work, we recommend generating chemically and thermally stable RABA by deactivating clay impurities of commercial grade activated bauxite with NaCl or KCl vapor under simulated PFBC exhaust environment, that is, high-temperature, high-pressure, and high concentrations of NaCl or KCl vapor in simulated PFBC exhaust compositions.},
doi = {10.2172/10148110},
url = {https://www.osti.gov/biblio/10148110}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {1}
}