Catalytic fluidized-bed combustion. Enhancement of sulfation of calcium oxide by iron oxide

Journal Article · Sat Jan 01 04:00:00 EST 1983 · Ind. Eng. Chem. Process Des. Dev.; (United States)

DOI:https://doi.org/10.1021/i200020a019· OSTI ID:6293674

Desai, N J; Yang, R T

A small amount of iron oxide coated on the surface of dolomite particles substantially increases both the reaction rate and the ultimate capacity for SO/sub 2/ sorption. Although the iron oxide coating was found to catalyze the sulphation of Tymochtee dolomite, it has an inhibiting effect on Greer limestone. The interplay of two opposing effects, increase in the chemical rate and a decrease in pore diffusion rate due to pore plugging, was shown experimentally with pellets of Greer limestone. For Tymochtee dolomite with 1.08% (by weight based on CaO) Fe/sub 2/O/sub 3/ coated on uncalcined stone, it has been shown, through a model, that for 90% sulphur retention a 40% reduction of the sorbent requirement can be achieved over the uncatalyzed case. Fluidization tests at 900/sup 0/C showed that no additional attrition of the sorbent particles was caused by the coated iron oxide.

• OSTI ID: 6293674
• Journal Information: Ind. Eng. Chem. Process Des. Dev.; (United States), Journal Name: Ind. Eng. Chem. Process Des. Dev.; (United States) Vol. 22:1; ISSN IEPDA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800 -- Coal
Lignite
& Peat-- Waste Management
014000* -- Coal
Lignite
& Peat-- Combustion
ALKALINE EARTH METAL COMPOUNDS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CARBONATE MINERALS
CARBONATE ROCKS
CARBONATES
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COMBUSTION
COMBUSTION PRODUCTS
DESULFURIZATION
DOLOMITE
ENERGY SOURCES
FLUIDIZATION
FLUIDIZED-BED COMBUSTION
FOSSIL FUELS
FUELS
IRON COMPOUNDS
IRON OXIDES
LIMESTONE
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MATERIALS
MINERALS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PARTICLES
ROCKS
SEDIMENTARY ROCKS
SORPTION
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS