Air Products and Chemicals, Inc.

International Coal Refining Company

Eugene J Greskovich

Augustine I Dalton, Jr

Ronald W Skinner

Walter A Zanchuk

Shivaji Sircar

Ravi Kumar

Edwin N Givens

Michael S Chen

Marshall L Spector

Thomas R White

Vincent T Ciuryla

A method for combusting slagging coal in a furnace comprising a firebox and at least one injection nozzle having a bore for a primary airstream and an annular passage for a secondary airstream, the nozzle communicating with the firebox, which method comprises (a) injecting a primary airstream containing a pulverized coal and injecting a secondary airstream through the injection nozzle into the flame zone of the furnace firebox, the combined primary and secondary airstream composing the total air for combustion and combusting the coal to yield a flame of combustion, and (b) injecting a sufficient amount of oxygen into the primary airstream such that an oxygen enriched primary airstream emanates from the injection nozzle and the oxygen concentration of the total air for combustion is about 22 to 27 volume percent, whereby the amount of slag deposition is reduced.

Slag reduction in coal-fired furnaces using oxygen enrichment

A method is disclosed for improving ignition time delay and carbon conversion efficiency in the combustion of coal water slurries wherein oxygen-enrichment of primary air is performed in the range of greater than 21% and up to 28%.

Combustion of coal/water slurries

A method is described for burning pulverized high ash coal in a furnace firebox and reducing ash fines which comprises

Combustion of high ash coals

Argon is recovered from a gas stream comprising the same in admixture with oxygen and nitrogen, by a vacuum swing adsorption (VSA) process wherein the mixed gas is passed through an adsorbent bed having thermodynamic selectivity for adsorption of nitrogen and the unadsorbed portion then passed through a second adsorbent bed having kinetic selectivity for retaining oxygen. Both adsorbent beds are regenerated by vacuum desorption, applied to the first bed for a longer time period than that of the second bed. Further purification of the recovered argon may be carried out, if desired, by catalytic hydrogenation of residual oxygen therein. The mixed gas stream fed to the VSA unit may be that obtained from the crude argon column associated with a cryogenic air separation plant and the waste gas from the VSA unit may be recycled to the main column of the cryogenic air separation plant, thus enhancing argon recovery.

Argon purification

An improvement in a process for producing hydrogen peroxide by contacting a mixture of hydrogen and oxygen with a palladium on carbon catalyst in the presence of an acidic liquid capable of inhibiting decomposition of thus-produced hydrogen peroxide comprises prolonging the useful life of the catalyst by continuous removal of palladium salts produced by solubilization of the catalyst from the acidic liquid, preferably by employing high surface activated carbon as the catalyst support and adsorbent for palladium salts.

Process for producing hydrogen peroxide

An improvement in a process for producing hydrogen peroxide by contacting a mixture of hydrogen and oxygen with a palladium on carbon catalyst in the presence of an acidic aqueous liquid capable of inhibiting decomposition of hydrogen peroxide comprises prolonging the useful life of the catalyst by continuous removal of palladium salts produced by solubilization of the catalyst from the acidic aqueous liquid.

This invention relates to an improved method of manufacturing carbon fibers from a coal derived pitch. The improvement resides in the use of a solvent refined coal which has been hydrotreated and subjected to solvent extraction whereby the hetero atom content in the resulting product is less than 4.0% by weight and the softening point is between about 100.degree.-250.degree. F.

Carbon fibers from SRC pitch

An improved method of operating an activated biomass process wherein influent and activated biomass are initially contacted under anaerobic conditions to form a mixed liquor, the mixed liquor is subsequently oxygenated, thereafter activated biomass is separated from the mixed liquor and at least a portion of the separated biomass is introduced into the initial contacting step. The improved method comprises maintaining both the F/M ratio and the BOD/P ratio within particular ranges, preferably relative to each other.

Control of activated sludge wastewater treating process for enhanced

A controlled process for the removal of sulfur oxides from gases by scrubbing with ammoniacal solutions in such a manner that the formation of sub-micron liquid particles (fog) is prevented at any point during the scrubbing operation, thereby preventing the formation of a plume (particulate matter) emission in the vapor effluent from the scrubbing.

Growing community of inventors

Allentown, PA, United States of America

Eugene J Greskovich