Synergistic capture mechanisms for alkali and sulfur species from combustion. Quarterly report No. 1, September--November 1990
The research described here is directed towards an investigation of mechanisms governing the capture of alkali metals and SO{sub 2} by injection of clay based sorbents into a combustor environment. While the species of interest are products of coal combustion, the earlier parts of these investigations will use a gas flame doped with relevant levels of Potassium, Sodium and Sulfur dioxide typical of a coal flame environment. This ensures that the particles so sampled from the combustor are from the injected sorbents and not mixed with coal ash. The approach here is to translate results from bench scale studies into evaluating governing mechanisms at a practical combustor level scale in which there exist both temperature variations and flow mixing characteristics. The research will thus consist of two tasks: (1) Detailed experimental studies for Alkali metals K, Na and toxic metal Cr in the presence of SO{sub 2} in which effect of parameters such as Speciation, Temperature profiles, Injection temperatures, residence time, bulk concentration levels, sorbent particle size and sorbent injection rates will be evaluated. (2) Theoretical modeling: Both equilibrium thermodynamics and reaction kinetics models will be used to correlate the experimental data. For these experiments the Sorbent type is Kaolinite (Al{sub 2}O{sub 3}2SiO{sub 2}3H{sub 2}O) which has been identified as most effective in alkali metal capture.
- Research Organization:
- Arizona Univ., Tucson, AZ (United States). Dept. of Chemical Engineering
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG22-90PC90285
- OSTI ID:
- 10127397
- Report Number(s):
- DOE/PC/90285--T1; ON: DE92008861
- Country of Publication:
- United States
- Language:
- English
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