Fundamental studies of calcium-based sorbents for SO/sub 2/ control from coal-fired boilers. Final report, October 1983-September 1984

Technical Report · Thu Jan 01 04:00:00 EST 1987

OSTI ID:6727282

Cole, J A; Kramlich, J C; Samuelsen, G S; Seeker, W R; Silcox, G D

This report gives results of laboratory-scale controlled-temperature experiments, studying aspects of SO/sub 2/ capture by calcium-based sorbents in a flame/gas environment. Experimental parameters were sorbent type, temperature, residence time, and effects of mineral additives (promoters) on sorbent reactivity. The data revealed that isothermal capture is greatest at 1000 C, above which sintering of the sorbent can occur which reduces sorbent utilization. The results suggest that (at ideal sulfation conditions--1000 C, isothermal residence times greater than 1 sec, no deactivation of the sorbent by coal-ash minerals) the best calcium utilizations achievable would be about 25-30% with the raw limestone tested (Vicron 45-3), about 30-35% with the raw dolomite tested, and about 40% with both precalcined dolomite (precalcined to a surface area of 60 sq m/g) and pressure-slaked dolomitic lime. Adding Cr/sub 2/O/sub 3/, alkali metal salts, and other promoters increased limestone use.

• Research Organization: Energy and Environmental Research Corp., Irvine, CA (USA)
• OSTI ID: 6727282
• Report Number(s): PB-87-152500/XAB
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
421000* -- Engineering-- Combustion Systems
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION ABATEMENT
ALKALINE EARTH METAL COMPOUNDS
BOILERS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CARBON COMPOUNDS
CARBONATES
CHALCOGENIDES
FUNCTIONAL MODELS
OXIDES
OXYGEN COMPOUNDS
PILOT PLANTS
POLLUTION ABATEMENT
REMOVAL
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES