Durable zinc ferrite sorbent pellets for hot coal gas desulfurization
A durable, pelletized and indurated sorbent for removing hydrogen sulfide from hot coal gas is described which consists essentially of zinc ferrite, has a surface area of about 0.5 to about 5 m./sup 2/gram, and is prepared by mixing fine iron oxide and fine zinc oxide, each having a particle size of less than about 1 micron in substantially equi-molar amounts with an inorganic binder in an amount greater than zero and up to about 15%, by weight, and an organic binder in an amount greater than zero and up to about 5%, by weight, up to about 5%, by weight, of manganese oxide, up to about 0.2%, by weight, of an alkali metal carbonate and up to about 0.2%, by weight, of molybdenite. The inorganic binder is capable of a strong bridging action between zinc ferrite particles during induration and the organic binder is capable of burning away during induration to form a porous structure, pelletizing the resulting mixture with water, drying the resulting pellets and indurating the dried pellets and a temperature of about 1600/sup 0/F to about 2000/sup 0/F to form strong, porous sorbent pellets having a crush strength of about 5 to about 20 lbs. Dead Weight Load.
- Assignee:
- AMAX Inc., Greenwich, CT
- Patent Number(s):
- US 4732888
- OSTI ID:
- 5110408
- Resource Relation:
- Patent File Date: Filed date 15 May 1986
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
20 FOSSIL-FUELED POWER PLANTS
54 ENVIRONMENTAL SCIENCES
FERRITES
SORPTIVE PROPERTIES
GASEOUS WASTES
DESORPTION
DESULFURIZATION
HYDROGEN SULFIDES
ABSORPTION
ZINC COMPOUNDS
ADSORBENTS
AIR POLLUTION CONTROL
ALKALI METAL COMPOUNDS
CARBONATES
CHEMICAL COMPOSITION
CHEMICAL PREPARATION
COAL
COMBUSTION PRODUCTS
IMPACT STRENGTH
MANGANESE OXIDES
MOLYBDENUM OXIDES
PELLETIZING
PELLETS
QUANTITY RATIO
REMOVAL
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
ENERGY SOURCES
FABRICATION
FERRIMAGNETIC MATERIALS
FOSSIL FUELS
FUELS
HYDROGEN COMPOUNDS
IRON COMPOUNDS
MAGNETIC MATERIALS
MANGANESE COMPOUNDS
MATERIALS
MECHANICAL PROPERTIES
MOLDING
MOLYBDENUM COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
REFRACTORY METAL COMPOUNDS
SULFIDES
SULFUR COMPOUNDS
SURFACE PROPERTIES
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
WASTES
010800* - Coal
Lignite
& Peat- Waste Management
200202 - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions
500200 - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)