OLS : Record

RECORD NUMBER: 33 OF 146

Main Title Current Status of ADVACATE Process for Flue Gas Desulfurization.
Author Hall, B. W.; Singer, C.; Jozewicz, W.; Sedman, C. B.; Maxwell., M. A.;
CORP Author Acurex Corp., Research Triangle Park, NC. Environmental Systems Div.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
Publisher 1991
Year Published 1991
Report Number EPA-68-DO-0141; EPA/600/D-91/173;
Stock Number PB91-226423
Subjects Air pollution control; Waste utilization; Fly ash; Flue gases; Desulfurization; Sorbents; Slurries; Calcium silicates; Sulfur dioxide; Calcium hydroxides; ADVACATE process; Flue gas desulfurization
Holdings
Library   Call Number Additional Info Location Date Modified
NTIS PB91-226423 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 11/26/1991
Collation 22p
Abstract The paper discusses current bench- and pilot-plant advances in preparation of ADVAnced siliCATE (ADVACATE) calcium silicate sorbents for flue gas desulfurization. It also discusses current bench- and pilot-plant advances in sorbent preparation. Fly ash was ground in a laboratory-scale grinder prior to slurrying in order to decrease the slurrying time needed for the sorbent to be reactive with SO2. Reactivity of ADVACATE sorbents with SO2 in the bench-scale reactor correlated with their surface area. ADVACATE sorbents produced with ground fly ash were evaluated in the 1.42 cu m/min pilot plant, providing 2 s duct residence time. ADVACATE sorbent was produced by slurrying ground fly ash (4.3 micrometer median particle size) with Ca(OH)2 at a weight ratio of 3:1 at 90 C for 3 h to yield solids with 30 wt % of initial free moisture. When this sorbent was injected into the duct with 1500 ppm SO2 and at 11 C approach to saturation, the measured SO2 removal was about 60% at a Ca/S stoichiometric ratio of 2.0. Previously, when ADVACATE sorbent was produced at 90 C and at the same fly-ash-to-Ca(OH)2 weight ratio using unground fly ash, removal under the same conditions in the duct was about 50% following 12 h slurrying. The report gives results of pilot-scale recycle tests at the recycle ratio of 2.0. Finally, the report discusses EPA's plans to commercialize ADVACATE.
Supplementary Notes Presented at the Air and Waste Management Association Annual Meeting, Vancouver, B.C., June 16-21, 1991. Sponsored by Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
NTIS Title Notes Rept. for Sep 90-Mar 91.
Category Codes 68A; 68C
NTIS Prices PC A03/MF A01
Primary Description 600/13
Document Type NT
Control Number 128226604
Cataloging Source NTIS/MT
Origin NTIS
Type CAT