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Main Title Experimental and Engineering Support for the CAFB (Chemically Active Fluid-Bed) Demonstration: Residue Disposal/Utilization.
Author Peterson, C. H. ; Ulerich, N. H. ; Newby, R. A. ; Keairns, D. L. ;
CORP Author Westinghouse Research and Development Center, Pittsburgh, PA.;Industrial Environmental Research Lab., Research Triangle Park, NC.
Year Published 1984
Report Number EPA-68-02-2142; EPA-600/7-84-028;
Stock Number PB84-162890
Additional Subjects Fluidized bed processors ; Air pollution control equipment ; Solid waste disposal ; Sorbents ; Leaching ; Industrial wastes ; Sulfur ; Lignite ; Sulfates ; Chemically active fluid bed process ; Waste utilization
Library Call Number Additional Info Location Last
NTIS  PB84-162890 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 124p
Abstract The report gives results of an investigation of the disposal and utilization of spent sulfur sorbent from the Chemically Active Fluid-bed (CAFB) process. Lignite ash with a minimum of 10% CaO can be used as a replacement for sand or medium aggregate or as a partial replacement for light aggregate in cement block manufacturing with higher strengths (14.68 to 26.82 MPa) than standard mixes, 4.62 to 5.62 MPa at 28 day cure tests. This indicates that the cement content of the mix may be reduced when CAFB residue is used. Disposal tests indicate that pH, calcium, and sulfate in the leachate are primary environmental concerns. Some lignites and coal may produce levels of trace materials (e.g., selenium, iron, and manganese) that exceed regulations. Any appreciable sulfide in the spent sorbent must be converted to sulfate before disposal. Fine particle size, possibly as small as -44 micrometers, appears necessary for complete conversion of the calcium sulfide to calcium sulfate in completely sulfided sorbent. Cementitious compounds may be formed under CAFB operating conditions, thus aiding disposal and reducing leachates from the spent sorbent.
NTIS Title Notes Final rept. 1979-82.
PUB Date Free Form Feb 84
Category Codes 13B; 68C; 68A
NTIS Prices PC A06/MF A01
Primary Description 600/13
Document Type NT
Cataloging Source NTIS/MT
Control Number 411844839
Origin NTIS
Type CAT