Regenerative process for desulfurization of high temperature combustion and fuel gases. Quarterly progress report No. 11, October 1-December 31, 1978
In the continuing search for more reactive calcium silicates, Portland cement, as an ingredient of concrete, has been identified to have favorable properties for sulfur absorption and regeneration. Various Portland cements have been studied for their reactivities for sulfation. Most of Portland cements showed equal or higher sorption reactivities than lime. Portland Type III had unusually high activity for a calcium-based sorbent. Furthermore, pellets could be formed from Portland Type III which had high resistance to attrition. Cyclic sulfation and regeneration using Portland Type III have been conducted in a TG system and there was no sign of weakening of the SO/sub 2/ sorption activity. The increased reactivity due to increased porosity of Portland cement pellet was noted by the addition of burnable carbon. The effects of both catalysis and porosity can be seen using fly ash as an additive. Sulfation and attrition tests for pellets of limestone fines with various binders have been tested. The results showed that both the strength and the sulfation reactivity were higher for pellets of the limestone fines with colloidal silica binder than for raw limestone. The effects of calcination temperature on the development of pore size and on the SO/sub 2/ sorption capacity have been investigated. It has been shown that the temperature maximum observed in a FBC can very possibly be due to pore size variations because of calcinations at different temperatures.
- Research Organization:
- Brookhaven National Lab., Upton, NY (USA)
- DOE Contract Number:
- EY-76-C-02-0016
- OSTI ID:
- 5864215
- Report Number(s):
- BNL-50992
- Country of Publication:
- United States
- Language:
- English
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Regenerative process for desulfurization of high temperature combustion and fuel gases. Progress report No. 13, April 1-September 30, 1979
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ADSORBENTS
ALKALINE EARTH METAL COMPOUNDS
BUILDING MATERIALS
CALCIUM COMPOUNDS
CALCIUM SILICATES
CARBONACEOUS MATERIALS
CARBONATE ROCKS
CEMENTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COAL
COMBUSTION
COMPARATIVE EVALUATIONS
DATA
DATA FORMS
DESULFURIZATION
ELEMENTS
ENERGY SOURCES
EXPERIMENTAL DATA
FABRICATION
FLUE GAS
FLUIDIZED-BED COMBUSTION
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASEOUS WASTES
GASES
GRAPHS
INFORMATION
KINETICS
LIMESTONE
MATERIALS
MOLDING
NONMETALS
NUMERICAL DATA
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PELLETIZING
POROSITY
PORTLAND CEMENT
REACTION KINETICS
REGENERATION
REMOVAL
RESERVOIR ROCK
ROCKS
SEDIMENTARY ROCKS
SILICATES
SILICON COMPOUNDS
SULFUR
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
THERMOCHEMICAL PROCESSES
WASTES