Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Current Status of ADVACATE Process for Flue Gas Desulfurization (Journal Article).
Author Hall, B. W. ; Singer, C. ; Jozewicz, W. ; Sedman, C. B. ; Maxwell, M. A. ;
CORP Author Acurex Corp., Research Triangle Park, NC.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
Publisher c1992
Year Published 1992
Report Number EPA-68-DO-0141; EPA/600/J-92/047;
Stock Number PB92-150622
Additional Subjects Air pollution control ; Fly ash ; Calcium silicates ; Performance evaluation ; Sorbents ; Sulfur dioxide ; Pilot plants ; Bench-scale experiments ; Calcium hydroxides ; Injection ; Reprints ; Flue gas desulfurization ; ADVACATE process ; Waste utilization
Library Call Number Additional Info Location Last
NTIS  PB92-150622 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 08/28/1992
Collation 10p
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 the 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.