Method of desulphurization of coal
A method of removing sulphur from coal prior to burning of the coal is the subject of the present invention. The coal is first comminuted to a size of no more than one inch and preferably one-half inch in diameter. The coal particles are placed in a reaction chamber in an aqueous suspension to which is added an inorganic base capable of reacting with hydrogen sulphide in order to neutralize the latter, such base preferably being calcium hydroxide. A catalyst, characterized by structural imperfections to provide active sites for supporting a free radical reaction, is also introduced into the reaction chamber. The coal is then subjected to electromagnetic irradiation of a specific energy level in order to create a free radical reaction which results in removal of the sulphur from the coal. The coal is then cleaned and separated from the aqueous media, and the inorganic base and elemental sulphur are removed from the aqueous media.
- Assignee:
- Research Manufacturing Consultation Corp.
- Patent Number(s):
- US 4488952
- OSTI ID:
- 5689344
- Resource Relation:
- Patent File Date: Filed date 16 Dec 1983; Other Information: PAT-APPL-562153
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COAL
DESULFURIZATION
CATALYSTS
HYDROGEN SULFIDES
REMOVAL
AIR POLLUTION ABATEMENT
AQUEOUS SOLUTIONS
CALCIUM HYDROXIDES
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTORS
CLEANING
COAL FINES
COAL PREPARATION
COMMINUTION
ELECTROMAGNETIC RADIATION
FUEL SLURRIES
PARTICLE SIZE
PH VALUE
PHOTOCONDUCTORS
RADICALS
REACTION INTERMEDIATES
SEPARATION PROCESSES
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
DISPERSIONS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROGEN COMPOUNDS
HYDROXIDES
KINETICS
MATERIALS
MIXTURES
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
RADIATIONS
REACTION KINETICS
SIZE
SLURRIES
SOLUTIONS
SULFIDES
SULFUR COMPOUNDS
SUSPENSIONS
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