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Title: Measurement of alkali in PFBC exhaust

Abstract

This project supports the DOE/METC Fossil Energy Program for the development of Pressurized fluidized bed combustion (PFBC) technology. Based on the analytical activated-bauxite sorber-bed technique, we are developing the RABSAM as an alternative to the on-line alkali analyzer for field application. RABSAM is a sampling probe containing a regenerable activated-bauxite adsorbent (RABA). It can be inserted directly into the PFBC exhaust duct and requires no high temperature/high pressure (HTHP) sampling line. Alkali vapors are captured by the adsorbent purely through physical adsorption. The adsorbent is regenerated by a simple water-reaching process, which also recovers the adsorbed alkalis. The alkali analysis of the leachate by atomic absorption (AA) provides a basis for calculating the time-averaged alkali-vapor concentration in the PFBC exhaust. If the RABA is to use commercial-grade activated bauxite, the clay impurities in activated bauxite can react with alkali vapors and, therefore, need to be either removed or deactivated. In earlier work, a 6[und M]-LiCl-solution impregnation technique was shown to deactivate these impurities in fresh activated bauxite. During this year, RABA prepared by this technique was tested in a pressurized alkali-vapor sorption test unit to determine its NaCl-vapor capture efficiency and the regenerability of the sorbent by water extraction. Resultsmore » of this study are presented and discussed in the following.« less

Authors:
; ; ;
Publication Date:
Research Org.:
Argonne National Lab., IL (United States)
Sponsoring Org.:
USDOE; USDOE, Washington, DC (United States)
OSTI Identifier:
7118072
Report Number(s):
CONF-921034-24
ON: DE93000231
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Conference
Resource Relation:
Conference: US Department of Energy contractors review meeting on coal-fueled heat engines, advanced PFBC and gas stream cleanup systems, Morgantown, WV (United States), 27-28 Oct 1992
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ALKALI METAL COMPOUNDS; MEASURING METHODS; BAUXITE; SORPTIVE PROPERTIES; FLUIDIZED-BED COMBUSTION; EXHAUST GASES; ABSORPTION SPECTROSCOPY; DEACTIVATION; HOT GAS CLEANUP; IMPURITIES; LITHIUM CHLORIDES; ON-LINE MEASUREMENT SYSTEMS; REGENERATION; ALUMINIUM ORES; CHEMICAL REACTIONS; CHLORIDES; CHLORINE COMPOUNDS; COMBUSTION; FLUIDS; GASEOUS WASTES; GASES; HALIDES; HALOGEN COMPOUNDS; LITHIUM COMPOUNDS; LITHIUM HALIDES; ON-LINE SYSTEMS; ORES; OXIDATION; PURIFICATION; SPECTROSCOPY; SURFACE PROPERTIES; THERMOCHEMICAL PROCESSES; WASTES; 010800* - Coal, Lignite, & Peat- Waste Management; 400102 - Chemical & Spectral Procedures; 010402 - Coal, Lignite, & Peat- Purification & Upgrading

Citation Formats

Schmalzer, D K, Steindler, M J, Lee, S H.D., and Swift, W M. Measurement of alkali in PFBC exhaust. United States: N. p., 1992. Web.
Schmalzer, D K, Steindler, M J, Lee, S H.D., & Swift, W M. Measurement of alkali in PFBC exhaust. United States.
Schmalzer, D K, Steindler, M J, Lee, S H.D., and Swift, W M. 1992. "Measurement of alkali in PFBC exhaust". United States.
@article{osti_7118072,
title = {Measurement of alkali in PFBC exhaust},
author = {Schmalzer, D K and Steindler, M J and Lee, S H.D. and Swift, W M},
abstractNote = {This project supports the DOE/METC Fossil Energy Program for the development of Pressurized fluidized bed combustion (PFBC) technology. Based on the analytical activated-bauxite sorber-bed technique, we are developing the RABSAM as an alternative to the on-line alkali analyzer for field application. RABSAM is a sampling probe containing a regenerable activated-bauxite adsorbent (RABA). It can be inserted directly into the PFBC exhaust duct and requires no high temperature/high pressure (HTHP) sampling line. Alkali vapors are captured by the adsorbent purely through physical adsorption. The adsorbent is regenerated by a simple water-reaching process, which also recovers the adsorbed alkalis. The alkali analysis of the leachate by atomic absorption (AA) provides a basis for calculating the time-averaged alkali-vapor concentration in the PFBC exhaust. If the RABA is to use commercial-grade activated bauxite, the clay impurities in activated bauxite can react with alkali vapors and, therefore, need to be either removed or deactivated. In earlier work, a 6[und M]-LiCl-solution impregnation technique was shown to deactivate these impurities in fresh activated bauxite. During this year, RABA prepared by this technique was tested in a pressurized alkali-vapor sorption test unit to determine its NaCl-vapor capture efficiency and the regenerability of the sorbent by water extraction. Results of this study are presented and discussed in the following.},
doi = {},
url = {https://www.osti.gov/biblio/7118072}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {1}
}

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