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Title: Measurement of alkali in PFBC exhaust

This project supports the DOE/METC Fossil Energy Program for the development of PFBC technology. Based on the analytical activated-bauxite sorber-bed technique, we are developing the RABSAM as an altemative to the on-line alkali analyzer for field application. As shown in Fig. 1, the 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 HTHP sampling line. Alkali vapors are captured by the adsorbent purely through physical adsorption. The adsorbent is regenerated by a simple water-leaching 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 6M-LiCl-solution impregnation technique was shown to deactivate these impurities in fresh activated bauxite [8]. 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.« less
Authors:
;
Publication Date:
OSTI Identifier:
10102885
Report Number(s):
ANL/CMT/CP--77193; CONF-921034--1
ON: DE93002900
DOE Contract Number:
W-31109-ENG-38
Resource Type:
Conference
Resource Relation:
Conference: 9. annual coal-fueled heat engines, advanced pressurized fluidized-bed combustion (PFBC), and gas stream cleanup systems contractors review meeting,Morgantown, WV (United States),27-29 Oct 1992; Other Information: PBD: [1992]
Research Org:
Argonne National Lab., IL (United States)
Sponsoring Org:
USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 20 FOSSIL-FUELED POWER PLANTS; COAL; FLUIDIZED-BED COMBUSTION; FLUIDIZED-BED COMBUSTORS; EMISSION; SAMPLING; CHEMICAL ANALYSIS; BAUXITE; SORPTIVE PROPERTIES; ALKALI METAL COMPOUNDS; ADSORPTION; ABSORPTION SPECTROSCOPY; LEACHING; REGENERATION 014000; 200202; COMBUSTION; NOXIOUS GAS AND PARTICULATE EMISSIONS