||Fundamental studies of calcium based sorbents for SO2 control from coal-fired boilers /
Cole, J. A. ;
Kramlich, J. C. ;
Samuelsen, G. S. ;
Seeker, W. R. ;
Silcox, G. D.
||Energy and Environmental Research Corp., Irvine, CA.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
|| U.S. Environmental Protection Agency, Air and Energy Engineering Research Laboratory,
Coal-fired furnaces--Environmental aspects. ;
Sulfur dioxide--Measurement. ;
Air pollution control ;
Sulfur dioxide ;
Calcium oxides ;
Calcium carbonates ;
Pilot plants ;
Coal fired boilers ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||218 pages : illustrations ; 28 cm
The report gives results of laboratory-scale controlled-temperature experiments, studying aspects of SO2 capture by calcium-based sorbents in a flame/gas environment. Experimental parameters were sorbent type, temperature, residence time, and effects of mineral additives (promoters) on sorbent reactivity. The data revealed that isothermal capture is greatest at 1000 C, above which sintering of the sorbent can occur which reduces sorbent utilization. The results suggest that (at ideal sulfation conditions--1000 C, isothermal residence times greater than 1 sec, no deactivation of the sorbent by coal ash minerals) the best calcium utilizations achievable would be about 25-30% with the raw limestone tested (Vicron 45-3), about 30-35% with the raw dolomite tested, and about 40% with both precalcined dolomite (precalcined to a surface area of 60 sq m/g) and pressure-slaked dolomitic lime. Adding Cr2O3, alkali metal salts, and other promoters increased limestone use.
Caption title. "January 1987." "EPA/600/7-87/002." Microfiche.