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RECORD NUMBER: 32 OF 38

OLS Field Name OLS Field Data
Main Title Silica-Enhanced Sorbents for Dry Injection Removal of SO2 from Flue Gas (Journal Version).
Author Jozewicz, W. ; Chang, J. C. S. ; Sedman, C. B. ; Brna, T. G. ;
CORP Author Acurex Corp., Research Triangle Park, NC.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
Publisher c1988
Year Published 1988
Report Number EPA-68-02-3988; EPA/600/J-88/156;
Stock Number PB89-119945
Additional Subjects Air pollution control ; Sulfur dioxide ; Flue gases ; Sorbents ; Silica dioxide ; Absorbers(Materials) ; Concentration(Composition) ; Fly ash ; Reprints ; Dry injection ; Stationary sources
Holdings
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Status
NTIS  PB89-119945 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 03/14/1989
Collation 9p
Abstract
The paper gives results of tests of novel silica-enhanced lime sorbents in a bench-scale sand-bed reactor for their potential for SO2 removal from flue gas. Reactor conditions were: 64 C, relative humidity 60% (corresponding to an approach to saturation temperature of 10 C), and inlet SO2 concentration 500 or 1000 ppm. The sorbents were prepared by pressure hydration of CaO or Ca(OH)2 with siliceous materials at 100-230 C (101-2793 kPa) for from 15 min. to 4 h. The conversion of Ca(OH)2 in the sand-bed reactor increased with the increasing weight ratio of flyash to lime and correlated well with B.E.T. surface area, increasing with increasing surface area. The optimum temperature range for the pressure hydration of flyash with Ca(OH)2 was 110-160 C. The pressure hydration of diatomaceous earth with CaO did not offer significant reactivity advantages over atmospheric hydration; however, the rate of enhancement of Ca(OH)2 conversions was much faster with pressure hydration. SEM and x-ray diffraction studies showed solids of different morphology with different flyash/lime ratios and changing conditions of pressure hydration. (Copyright (c) 1988, APCA.)