Regenerative process for desulfurization of high temperature combustion and fuel gases. Progress report No. 13, April 1-September 30, 1979

Technical Report · Mon Jan 01 04:00:00 EST 1979

DOI:https://doi.org/10.2172/5371288· OSTI ID:5371288

Shen, M S; Albanese, A S

Various types of portland cement were subjected to sulfation/regeneration cycling for application in fluidized bed combustion (FBC) systems. Among them, Type III was the most reactive sorbent for SO/sub 2/ absorption. Sulfated portland cement is highly superior in its resistance to attrition than sulfated limestone which has serious attrition loss problems in fluidized-bed combustors. An isothermal sulfation/regeneration cycle for portland cement Type III pellets has been evaluated. Sulfation reactivity was optimized as a function of the quantity of carbon and water used in preparing the pellets. The sulfation rate was independent of the type of carbon used. Cement kiln dust, a waste product, was also teated as an absorbent for SO/sub 2/. TGA experiments on the extent of regeneration and SO/sub 2/ concentration in the off-gas under various pressures and temperatures are being conducted. This information is of importance to pressurized fluidized bed (PFC) operations. Cycling of Type III portland cement pellets between sulfation and regeneration conditions indicate good maintenance of capacity with little deterioration after 20 cycles. These cycling experiments are continuing. Experiments are being made with a 3'' rotary kiln to provide information on kiln performance under various operating conditions. Among the variables considered are temperature, residence time, extent of regeneration and SO/sub 2/ concentration in the off gas. The feasibility of an alternative regeneration scheme has been studied.

• Research Organization: Brookhaven National Lab., Upton, NY (USA)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5371288
• Report Number(s): BNL-51106
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
010800 -- Coal
Lignite
& Peat-- Waste Management
014000 -- Coal
Lignite
& Peat-- Combustion
BUILDING MATERIALS
CARBONACEOUS MATERIALS
CEMENTS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COMBUSTION
DESULFURIZATION
ENERGY SOURCES
FLUE GAS
FLUIDIZED-BED COMBUSTION
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASEOUS WASTES
GASES
MATERIALS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
REGENERATION
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
THERMOCHEMICAL PROCESSES
WASTES