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8703081 Sorbents for coal combustion  
Sorbent compositions containing halogen and calcium are added to coal to mitigate the release of sulfur and/or other harmful elements, including mercury, into the environment during combustion of...
8545778 Sorbents for coal combustion  
Sorbent compositions containing halogen and calcium are added to coal to mitigate the release of sulfur and/or other harmful elements, including mercury, into the environment during combustion of...
8313323 Sorbents for coal combustion  
Sorbent compositions containing halogen and calcium are added to coal to mitigate the release of sulfur and/or other harmful elements, including mercury, into the environment during combustion of...
8282693 Method of operating a thermal installation and use of such a method for inhibiting vanadium corrosion  
The invention provides a method of operating a thermal installation comprising a combustion chamber fed with a fuel contaminated with vanadium, with sulphur and possibly with sodium. In...
8114368 Sorbents for coal combustion  
Sorbent compositions containing halogen and calcium are added to coal to mitigate the release of sulfur and/or other harmful elements, including mercury, into the environment during combustion of...
7988939 Sorbents for coal combustion  
Sorbent compositions containing halogen and calcium are added to coal to mitigate the release of sulfur and/or other harmful elements, including mercury, into the environment during combustion of...
7645362 Method for pretreating and improving coking coal quality for blast furnace coke  
Methods for pretreating and improving coking coal quality for producing blast-furnace coke by: (a) rapid-heating the coal charge in a fluidized-bed to a temperature range between not lower than...
7507083 Reducing mercury emissions from the burning of coal  
Processes and compositions are provided for decreasing emissions of mercury upon combustion of fuels such as coal. Various sorbent compositions are provided that contain components that reduce the...
7374590 Reducing sulfur dioxide emissions from coal combustion  
A process of treating high sulfur coal to reduce sulfur dioxide emission when the high sulfur coal is burned comprising placing coal in pressure tank (16) of reduced pressure sufficient to...
7101410 Method for the microbiological desulfurization of fossil fuels  
A microbiological method of desulfurization (MDS) of hydrocarbon fuels such as coal, coal tar and petroleum uses an aqueous microbial biocatalytic agent which is not significantly reproducing but...
7056359 Process for modifying coal so as to reduce sulfur emissions  
A method of manufacturing a coal product having reduced sulfur emissions including the steps of grinding coal into a powder form having a desired particle size; blending the ground coal with...
6461859 Enzymatic oxidation process for desulfurization of fossil fuels  
The invention relates to a method of removing thiophenic and organosulfide compounds from a fossil fuel comprising the steps of contacting the fossil fuel with hemoproteins, which oxidize the...
6068737 Simultaneous demetallization and desulphuration of carbonaceous materials via microwaves  
The process of demetalization and desulphuration of a mixture of carbonaceous material in an acid medium subjecting the mixture to the influence of wave energy in the microwave range, recovering,...
5795484 Method and apparatus for dewatering  
An ultra-fine coal particle fraction forms a coal product with particles that are dilatant due to the mechanical stripping of the clay contaminates from the coal surface and the subdividing of the...
5676711 Oil conversion process  
An improved process for producing a low-sulfur fuel oil or gas from used oil and finely divided coal. After mixing, the coal/oil slurry is heated within a pressure vessel to a temperature of...
5578092 Method and a device for producing fuels  
A method for producing fuels based on solid carbonaceous natural fuels which are particularly suited for non-polluting thermal power generation with gas and steam turbines in a combined cycle...
5575824 Coal preparation device  
The present invention provides for a fuel coal processing system having a centrifugal type coal pulverizer and an electrostatic type coal purifier and an optional fuel coal size classifier all...
5573556 Conversion of solid carbonaceous material using polyoxoanions  
A process for the conversion of solid carbonaceous materials, such as coal, to liquid products using one or more polyoxoanions selected from those represented by: [(Cn H2n+1)4 N]a Mb Oc Hd, where...
5529587 Fluidized oxydesulfurization of coal  
The method of the subject invention comprises a method and apparatus for removing sulfur in coal prior to combustion. In a fluid bed reactor, coal particles pass through a gaseous medium of air...
5509945 Mild desulfurization of sulfur-bearing materials  
A method for the removal of sulfur from sulfur-bearing materials such as coal and petroleum products using organophosphine and organophosphite compounds is provided.
5505746 Method of treating coal to reduce sulphur and chlorine emissions  
Methods and compositions are provided for treating coal to reduce the emissions of sulphur dioxide and hydrogen chloride gases upon combustion. In the subject method, coal is washed with a calcium...
5458659 Desulfurization of carbonaceous fuels  
First, nitrogen oxides are reduced by firing coal in substoichiometric air conditions in a first stage oxidation unit of a combustor to reduce NOx from fuel bound nitrogen. Hydrated lime, Ca(OH)2,...
5437696 Method of removal of sulfur from coal and petroleum products  
A method for the removal of sulfur from sulfur-bearing materials such as coal and petroleum products using organophosphine and organophosphite compounds is provided.
5393311 Method and apparatus for desulfurizing coal  
A method and apparatus for desulfurizing coal is provided. The method involves combining non-pulverized sulfur containing coal with an adsorbent material, such as aluminum oxide, in a vessel,...
5368617 Process for reducing sulfur emissions with calcium-containing sorbents  
An improved process for reducing sulfur oxide emissions from the combustion of coal is disclosed wherein a fuel mixture comprising calcium-containing sorbent and coal is fed to the burners and...
5358869 Microbial cleavage of organic C-S bonds  
A microbial process for selective cleavage of organic C--S bonds which may be used for reducing the sulfur content of sulfur-containing organic carbonaceous materials, Microorganisms of...
5350431 Process for chemical desulfurization of coal  
A process for chemical desulfurization of coal, in which coal is brought into contact with a desulfurizing agent after or while the coal is irradiated with ultraviolet light, thereby to give...
5316751 Methods for mine tailing clean-up using recovery technologies  
A method for site remediation for mitigating contamination from metals or metal compounds, particularly resulting from the situation of mine tailing waste on or near water sources, including the...
5277368 Coal cleaning process  
Fine particle coal is beneficiated in specially designed dense medium cyclones to improve particle acceleration and enhance separation efficiency. Raw coal feed is first sized to remove fine coal...
5248413 Process for removing sulfur and producing enhanced quality and environmentally acceptable products for energy production from coal  
A process for producing enhanced quality adsorbent carbons and environmentally acceptable materials for energy production from coal includes an initial step of physically cleaning the coal to...
5246470 Removal of sulfur from coal and pitch with dolomite  
The sulfur in bituminous coal can be converted to calcium sulfate instead of sulfur dioxide during combustion when it is mixed with petroleum pitch and calcium oxide, calcium carbonate or dolomite.
5217503 Process for desulfurization of coal and ores  
An additional step directed to the Starbuck process of desulfurizing coal and ores, as described and claimed in reissue patent No. RE. 32,454 dated Jul. 7, 1987, including the treatment of...
H001074 Bacterio-electric leaching of metals  
The separation of cationic materials from an ore body is assisted by the application of an electric potential, and resulting current, to the ore body, in association with iron or sulphur oxidizing...
5123931 Coal recovery process  
A method for the beneficiation of coal by selective agglomeration and the beneficiated coal product thereof is disclosed wherein coal, comprising impurities, is comminuted to a particle size...
5094668 Enzymatic coal desulfurization  
Coal is desulfurized by oxidation to convert organic sulfur moieties in the coal matrix to sulfates, and by treatment with a sulfatase to cleave the sulfates and thereby remove organic sulfur.
5092909 Biodesulphurization process utilizing bacteria  
Method and apparatus for treating sulphur bearing coal comprising pulverizing the coal, mixing it with water, a reagent and free air and pumping the resulting mixture to a classifier to separate...
5085764 Process for upgrading coal  
In a process for reducing the sulfur and ash contents of coal, coal is sequentially contacted with fused alkali metal caustic, wash water, and acid. Contacting the coal with the caustic produces...
5049163 Process for reducing sulphur dioxide emission from burning coal containing sulphur  
This invention discloses a process for reducing sulphur dioxide emission from burning coal containing sulphur. In the disclosed process, pulverized combustible materials, such as coal, wood flour,...
5037450 Method and apparatus for desulfurizing and denitrifying coal  
An apparatus and process for desulfurizing and denitrifying coal by pyrolysis and subsequently treating the gaseous pyrolysis by-products with a solid sorbent to substantially reduce the release...
4983187 Method for preparing a high-concentration solids suspension in water  
A method is described for preparing a high-concentration solids suspension, in particular coal or petroleum coke, which can be transported by pipe and be burnt with low emission of harmful...
4946658 Addition of pyritic materials to feed mix for desulfurization of phosphogypsum  
A pelletized mixture of gypsum, carbonaceous material and pyrite is charged to a travelling grate where the charge is heated under suitable conditions to produce a solid sintered material which...
4915706 Coal-water fuel production  
A process and apparatus for producing coal-water fuel comprises crushing and primary grinding of the coal to form a liberated granular material, multiple stage froth flotation of the granulated...
4888029 Desulfurization of carbonaceous materials  
A process for desulfurizing carbonaceous material containing inorganic bound sulfur, organic bound sulfur, or conbinations thereof. The process comprises reacting the carbonaceous material at...
4886519 Method for reducing sox emissions during the combustion of sulfur-containing combustible compositions  
This invention relates to the reduction of oxidized sulfur compound (SOX) emissions produced during combustion of sulfur (S)-containing combustible compounds. More particularly, this invention...
4867868 Selective flotation of inorganic sulfides from coal  
Pyritic sulfur is removed from coal or other carbonaceous material through the use of humic acid as a coal flotation depressant. Following the removal of coarse pyrite, the carbonaceous material...
4859212 Chemical cleaning of coal by molten caustic leaching after pretreatment by low-temperature devolatilization  
Pretreatment of coal by devolatization at temperatures ranging from about 420° C. to about 450° C. for from about 10 minutes to about 30 minutes before leaching with molten caustic leads to a...
4832701 Process for the regeneration of an additive used to control emissions during the combustion of high sulfur fuel  
A regenerating process comprises leaching a combustion ash with water so as to dissolve same and form a pregnant leach liquor containing the additive which is separated from the solid residue. The...
4830634 Preparation of coal substitute of low ash and sulfur  
A process is taught for preparing a coal substitute of low ash level from a composite of coal, mineral matter and pyritic sulfur comprising comminuting the coal composite in an aqueous medium to a...
4820313 Coal processing method and apparatus  
An ecologically safe, mechanical, single stage process that employs low pressure induced fracturing of the carbon matrix of coal to desulphurize and reduce lump coal to uniform micron particle...
4810258 Low rank coal or peat having impurities removed by a drying process  
A low rank coal or peat has various impurities removed therefrom by a drying process. The impurities may be removed in a subsequent operation. The dried coal or peat will not absorb substantial...

Matches 1 - 50 out of 115 1 2 3 >