Sulfur/alkali/calcium oxide sorbent interaction in pressurized coal combustors

Conference · Tue Jan 01 04:00:00 EST 1985

OSTI ID:5552053

Garman, A R; Boni, A A; Campbell, J P; Simons, G A; Johnson, S A

Modeling and bench-scale experiments have been performed related to the capture of fuel-bound sulfur by calcium-based sorbents in pressurized coal combustors. Sulfur capture data on a number of sorbents have been obtained in the presence of alkali promoters. Sorbent types tested include two limestones, a dolomite, a slaked lime, and a pressure-hydrated dolomite, with and without several sodium-based minerals present. Data on SO/sub 2/ capture have been obtained at atmospheric pressure and at pressures of 10 atm. These data have been used to validate a porous sorbent model developed at Physical Sciences Inc. The model has then been used to predict system performance for heat engine applications. The results suggest that in-situ injection of pressure-hydrated sorbents with high surface area should remove greater than 50% of the SO/sub 2/ at 10 atm. Furthermore the presence of alkali minerals in the coal can enhance the intrinsic reactivity by a factor of two or more leading to 60 to 80% capture at residence times of 0.5 sec. Conveniently the calcium sorbent can serve as a site for alkali condensation and removal. 21 refs., 14 figs.

• Research Organization: Physical Sciences, Inc., Andover, MA (USA)
• DOE Contract Number: AC21-84MC21388
• OSTI ID: 5552053
• Report Number(s): CONF-851005-1; PSI-388/SR-219; ON: DE85015212
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
20 FOSSIL-FUELED POWER PLANTS
200202 -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
ADDITIVES
ALKALI METAL COMPOUNDS
ALKALI METALS
ALKALINE EARTH METAL COMPOUNDS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CALCIUM HYDROXIDES
CALCIUM OXIDES
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CARBONATE MINERALS
CARBONATE ROCKS
CARBONATES
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COAL
COMBUSTION
DATA
DOLOMITE
ELEMENTS
ENERGY SOURCES
ENGINES
EXPERIMENTAL DATA
FOSSIL FUELS
FUEL-AIR RATIO
FUELS
HEAT ENGINES
HYDROGEN COMPOUNDS
HYDROXIDES
INFORMATION
KINETICS
LIMESTONE
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MATERIALS
MATHEMATICAL MODELS
MEDIUM PRESSURE
METALS
MINERALS
NONMETALS
NUMERICAL DATA
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PRESSURE DEPENDENCE
REACTION KINETICS
RECOMMENDATIONS
RETENTION
ROCKS
SEDIMENTARY ROCKS
SLAGS
SODIUM CARBONATES
SODIUM COMPOUNDS
SORPTIVE PROPERTIES
SULFUR
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
THERMOCHEMICAL PROCESSES
TIME DEPENDENCE
TRONA
VAPOR CONDENSATION