Composite clay materials for removal of SOx from gas streams
A composition is described for use in removing SO[sub x] from a flue gas stream when the composition is heated which comprises in admixture: (a) a basic compound selected from the group consisting of sodium and calcium salts and bases; and (b) a smectite clay wherein the ratio of basic compound to clay is between about 1 to 3 and 5 to 1 by weight so that the composition when heated removes SO[sub x] and; wherein the basic compound is provided in an aqueous suspension with the clay and then dried to form the composition, wherein the salts or bases are dispersed on the clay and wherein the mixture is a powder. The composition of claim 1 is described wherein the admixture of an iron salt for oxidizing SO[sub 2] to SO[sub 3] when the composition is heated which forms Fe[sub 2]O[sub 3] upon thermal decomposition of the salt.
- Assignee:
- Michigan State Univ., East Lansing, MI (United States)
- Patent Number(s):
- US 5234877; A
- Application Number:
- PPN: US 7-986509
- OSTI ID:
- 6250983
- Resource Relation:
- Patent File Date: 7 Dec 1992
- Country of Publication:
- United States
- Language:
- English
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Composite clay materials for removal of SOx from gas streams
Clay composites for the removal of SO sub x from flue gas streams
Related Subjects
01 COAL, LIGNITE, AND PEAT
FLUE GAS
DESULFURIZATION
SMECTITE
SORPTIVE PROPERTIES
SULFUR DIOXIDE
AIR POLLUTION CONTROL
CALCIUM COMPOUNDS
CHEMICAL COMPOSITION
DECOMPOSITION
HEATING
IRON COMPOUNDS
IRON OXIDES
OXIDATION
POWDERS
SODIUM COMPOUNDS
SULFUR TRIOXIDE
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
CLAYS
CONTROL
GASEOUS WASTES
MINERALS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
SILICATE MINERALS
SULFUR COMPOUNDS
SULFUR OXIDES
SURFACE PROPERTIES
TRANSITION ELEMENT COMPOUNDS
WASTES
540120* - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)
010800 - Coal
Lignite
& Peat- Waste Management