Silica-enhanced sorbents for dry-injection removal of SO/sub 2/ from flue gas. Report for September 1986-March 1987

Technical Report · Wed Apr 01 04:00:00 EST 1987

OSTI ID:6149586

Jozewicz, W; Chang, J C.S.; Sedman, C B; Brna, T G

This paper gives results of tests of novel silica-enhanced lime sorbents in a bench-scale sand-bed reactor for their potential for SO/sub 2/ removal from flue gas. Reactor conditions were: 64 C, relative humidity 60% (corresponding to an approach to saturation temperature of 10C), and inlet SO/sub 2/ concentration 500 or 1000 ppm. The sorbents were prepared by pressure hydration of CaO or Ca(OH)/sub 2/ with siliceous materials at 100-230 C(101-2793 kPa) for from 15 min. to 4 h. The optimum temperature range for the pressure hydration of fly ash with Ca(OH)/sub 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)/sub 2/ conversions was much faster with pressure hydration. SEM and x-ray-diffraction studies showed solids of different morphology with different fly ash/lime ratios and changing conditions of pressure hydration.

• Research Organization: Acurex Corp., Research Triangle Park, NC (USA)
• OSTI ID: 6149586
• Report Number(s): PB-87-182663/XAB
• Country of Publication: United States
• Language: English

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AIR POLLUTION ABATEMENT
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