You are here:
DEVELOPMENT AND PILOT PLANT EVALUATION OF SILICA-ENHANCED LIME SORBENTS FOR DRY FLUE GAS DESULFURIZATION (JOURNAL VERSION)
Citation:
Jozewicz, W., C. Jorgensen, J. Chang, C. Sedman, AND T. Brna. DEVELOPMENT AND PILOT PLANT EVALUATION OF SILICA-ENHANCED LIME SORBENTS FOR DRY FLUE GAS DESULFURIZATION (JOURNAL VERSION). U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-88/177 (NTIS PB89119481), 1988.
Description:
The paper discusses recent work on lime enhancement and testing at the bench-scale, followed by evaluation of the more promising sorbents in a pilot plant to develop low cost, retrofittable flue gas cleaning technology specifically the development of highly reactive sorbents. Conversion of Ca(OH)2 with SO2 increased several-fold when Ca(OH)2 was slurried with fly ash first and later exposed to SO2 in a laboratory packed bed reactor; Ca(OH)2 enhancement increasing with increased fly ash amount. Diatomaceous earths were very effective reactivity promoters of lime-based sorbents. Analysis of the promoted sorbents revealed the formation of a new phase (calcium silicate hydrates) after hydration, which may be the basis for improved SO2 capture. Fly ash/lime and diatomaceous earth/lime sorbents were tested in a 100 cu m/h pilot facility incorporating a gas humidifier, a sorbent duct injection system, and a baghouse. The inlet SO2 concentration was 1000-2500 ppm. With once-through dry sorbents injection into the humidified flue gas, the total SO2 removal ranged from 50 to 90%. (Copyright (c) 1988 Air Pollution Control Association.)