Calcium silicates: a new class of highly regenerative sorbents for hot gas desulphurization
A thermodynamic and kinetic study on the use of calcium silicates and silica-supported lime as regenerative sorbents for desulfurization of hot combustion gases showed that, with two exceptions, all the calcium silicates and the silica-supported calcium oxide were as reactive as, or more reactive than, calcium oxide. The regeneration rates of these sorbents were substantially higher than that of calcium oxide, the rate of thermal decomposition of the sulfated mono- and dicalcium silicates being about 15 times higher than that of calcium sulfate. Sulfation rates of two of the calcium silicates were first order with respect to sulfur dioxide only for partial pressure of sulfur dioxide 4/3; 3000 ppm. The silica-supported calcium oxide after heat treatment at 1075 2 C had one of the calcium silicates on its surface.
- OSTI ID:
- 5687930
- Journal Information:
- AIChE J.; (United States), Journal Name: AIChE J.; (United States) Vol. 25:5; ISSN AICEA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Regenerative process for desulfurization of high temperature combustion and fuel gases. Quarterly progress report No. 6, July 1--September 30, 1977
Regenerative process for desulfurization of high temperature combustion and fuel gases. Quarterly progress report No. 9, April 1--June 30, 1978
Related Subjects
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ADSORBENTS
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM OXIDES
CALCIUM SILICATES
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMBUSTION PRODUCTS
COMPARATIVE EVALUATIONS
DATA
DECOMPOSITION
DESULFURIZATION
EVALUATION
FLUE GAS
GASEOUS WASTES
INFORMATION
KINETICS
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
REGENERATION
REMOVAL
SILICATES
SILICON COMPOUNDS
SORPTIVE PROPERTIES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SURFACE PROPERTIES
THERMODYNAMICS
WASTES