Measurement of alkali in PFBC exhaust
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.
- 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:
- 7118072
- Report Number(s):
- CONF-921034-24; ON: DE93000231
- 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
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Measurement of alkali in PFBC exhaust
Measurement of alkali in PFBC exhaust
Related Subjects
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