sulfur removal from coal

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  • How to Remove Sulphur from Coal

    The combination gravity and flotation methods demonstrate the technical feasibility of processing fine size coal to effectively remove sulfur and ash to recover high quality clean coal products which meet or exceed specifications for commercial grade coal as regards to Btu value, and ash and sulfur content.New technology removes sulfur from coal,Luttrell adds, "If we can remove the sulfur, we can increase the value of eastern U.S. coals." Studies at the Center for Coal and Minerals Processing showed that the patented technology can increase the retail value of coal by $2-3 per ton by virtue of the lower sulfur content in the coal.

  • Desulfurization of Coal

    • The use of low-sulfur coal • Pretreatment of coal for sulfur removal. • In situ sulfur capture during combustion. • Post-combustion treatment of flue gas 2. Sulfur in Coal 2.1 Sulfur Content The total sulfur content of coal can vary within a single deposit as well as between deposits.Sulfur removal by fine coal cleaning processes ScienceDirect,Fuel 1997 Volume 76 Number 13 1191 S removal by fine coal cleaning processes: to be as efficient as mechanically more complex commercially available centrifugal gravity concentrators for pyritic sulfur removal from coal. Any crushing, separation and ultimate dewatering will significantly increase the cost of coal preparation.

  • US4123230A Sulfur removal from coal Google Patents

    US4123230A US05/831,170 US83117077A US4123230A US 4123230 A US4123230 A US 4123230A US 83117077 A US83117077 A US 83117077A US 4123230 A US4123230 A US 4123230A Authority US United States Prior art keywords coal hydrogen sulfur process wt Prior art date 1977-09-07 Legal status (The legal status is an assumption and is not a legal conclusion.Process for removing sulfur from coal(Patent) DOE Patents,Abstract. A process is disclosed for the removal of divalent organic and inorganic sulfur compounds from coal and other carbonaceous material. A slurry of pulverized carbonaceous material is contacted with an electrophilic oxidant which selectively oxidizes the divalent organic and inorganic compounds to trivalent and tetravalent compounds.

  • Sulfur Dioxide Scrubbers Air Quality Duke Energy

    Sulfur dioxide is a colorless gas that can be released into the air through various manufacturing processes, particularly through the combustion of coal for power generation. SO 2 is also released to the air from natural sources, but on average, human activities are the predominant global source.Sulfur removal from coal char using convert-remove,@article{osti_6923346, title = {Sulfur removal from coal char using convert-remove technology}, author = {Tipton, A.B.}, abstractNote = {The Convert-Remove technology uses two types of treatment steps to produce a low sulfur product. The Convert Step is concerned with lowering the organic sulfur while the remove step only affects inorganic sulfur.

  • Sulfur removal in coal tar pitch by oxidation with

    Highlights A highly effective method for sulfur removal from coal tar pitch was developed. The rate of removal for sulfur in coal tar pitch may reach 91.1%. The effects of H 2 O 2 and trichloroacetic acid on sulfur removal were investigated. Surfactants used in the experiments have no positive effect on sulfur removal.Read "Air Quality and Stationary Source Emission Control,(Chapter 10 was written by Harry Perry under the general supervision of the committee, which reviewed the work at several stages and suggested modifications that have been incorporated. While every committee member has not necessarily read and agreed to every detailed statement contained within, the

  • Sulfur removal in coal tar pitch by oxidation with

    Highlights A highly effective method for sulfur removal from coal tar pitch was developed. The rate of removal for sulfur in coal tar pitch may reach 91.1%. The effects of H 2 O 2 and trichloroacetic acid on sulfur removal were investigated. Surfactants used in the experiments have no positive effect on sulfur removal.Read "Air Quality and Stationary Source Emission Control,(Chapter 10 was written by Harry Perry under the general supervision of the committee, which reviewed the work at several stages and suggested modifications that have been incorporated. While every committee member has not necessarily read and agreed to every detailed statement contained within, the

  • US4123230A Sulfur removal from coal Google Patents

    US4123230A US05/831,170 US83117077A US4123230A US 4123230 A US4123230 A US 4123230A US 83117077 A US83117077 A US 83117077A US 4123230 A US4123230 A US 4123230A Authority US United States Prior art keywords coal hydrogen sulfur process wt Prior art date 1977-09-07 Legal status (The legal status is an assumption and is not a legal conclusion.Sulfur removal from coal char using convert-remove,@article{osti_6923346, title = {Sulfur removal from coal char using convert-remove technology}, author = {Tipton, A.B.}, abstractNote = {The Convert-Remove technology uses two types of treatment steps to produce a low sulfur product. The Convert Step is concerned with lowering the organic sulfur while the remove step only affects inorganic sulfur.

  • High-Temperature Sulfur Removal in Gasification

    High-Temperature Sulfur Removal in Gasification Applications Raghubir Gupta Research Director Center for Energy Technology RTI International August 23, 2007. 2 + Air Oxygen (95-99%) N2 Coal + Water What is Gasification? Gasifier Section: •Controlled chemical reaction Sulfur Removal If Required (AGR = Acid Gas Removal) 8ORGANIC SULFUR AND HAP REMOVAL FROM COAL WITH ,removal from coal. With the diminishing supply of low-sulfur coal and with more restrictions imposed on the use of high-sulfur coal, sulfur removal from coal prior to combustion has become important. Despite numerous attempts to remove sulfur from coal for low-sulfur, clean coal combustion

  • SELECTIVE REMOVAL OF ORGANIC SULFUR FROM COAL BY

    May 21, 2007· Desulfurization of coal involves the removal of both the inorganic and organic forms of sulfur. Several physical methods are available for the removal of inorganic sulfur which is normally represented by pyritic and sulfatic sulfur. Removal of organic sulfur requires the Removal Sulfur Compounds from Coal the Organism ,sulfur removal from coal. The rate of sulfur removal by S. acidocaldarius was strongly dependent on the sulfur content of the coal and on the total external surface area of coal particles. Approximately 96% of inorganic sulfur was removedfrom a5%slurry ofcoal whichhadan initial total sulfur content of4%

  • COAL-FIRED POWER PLANTS:SULFUR DIOXIDE REMOVAL

    SULFUR DIOXIDE REMOVAL. There are no combustion strategies that can be used to control the generation of sulfur dioxide in PC plants. If sulfur is present in coal it will be converted into sulfur dioxide during combustion.Sulfur Dioxide Scrubbers Air Quality Duke Energy,Sulfur dioxide is a colorless gas that can be released into the air through various manufacturing processes, particularly through the combustion of coal for power generation. SO 2 is also released to the air from natural sources, but on average, human activities are the predominant global source.

  • Evaluation of the Removal of Organic Sulfur from Coal

    the rapid removal of most of the inorganic sulfur and a substantial portion of the organic sulfur under relatively mild conditions. However, the removal of organic sulfur varies from coal to coal 06). Even for the same coal, the reduction in organic sulfur may be variable because of sample heterogeneity,US4071328A Method of removing sulfur from coal Google,A process of reducing the total sulfur content of coal is disclosed. The process comprises hydrogenating the coal to remove at least a portion of the recoverable sulfur combined as pyritic sulfur. The hydrogenated coal is subsequently contacted with a sufficient amount of an aqueous inorganic acid solution to remove at least a portion of the remaining sulfur initially combined as pyritic sulfur.

  • Removal of sulfur and ash from coal using molten caustic

    removal in both of coal samples. Pyritic sulfur removal was achieved at higher percentage than organic sulfur, but it could be said that the degree of degradation depends on the nature and composition of coal because of the closeness of sulfur removal percentage of pyritic and organic sulfur in Hazro coal sample. The removal of ash was aroundSulfur removal in coal tar pitch by oxidation with,The oxidative system composed of H sub(2O) sub(2) and TCA is highly effective for sulfur removal from CTP. The reaction conditions such as type of solvent used, temperature, and CTP-to-TCA ratio considerably influence sulfur removal when the same oxidant is used.

  • SELECTIVE REMOVAL OF ORGANIC SULFUR FROM COAL BY

    May 21, 2007· Desulfurization of coal involves the removal of both the inorganic and organic forms of sulfur. Several physical methods are available for the removal of inorganic sulfur which is normally represented by pyritic and sulfatic sulfur. Removal of organic sulfur requires the Chemical Removal of Nitrogen and Organic Sulfur from Coal,The TRW program, supported by APCO, for Chemical Removal of Nitrogen and Organic Sulfur from Coal was organized into three tasks, a) screening of solvents for removal of organic sulfur, b) screening of solvents for removal of nitrogen, and c) more detailed characterization of the extraction process and extracted coal.

  • STUDY OF SULFUR BEHAVIOR AND REMOVAL DURING

    STUDY OF SULFUR BEHAVIOR AND REMOVAL DURING THERMAL DESUL FURIZATION OF ILLINOIS COALS Sulfur removal by charring at 750°C for 5 minutes and hydrotreatment at Much of the coal in the Illinois Basin is high-sulfur coal, greater than 3 percent total sulfur, which limits its useEvaluation of the Removal of Organic Sulfur from Coal,the rapid removal of most of the inorganic sulfur and a substantial portion of the organic sulfur under relatively mild conditions. However, the removal of organic sulfur varies from coal to coal 06). Even for the same coal, the reduction in organic sulfur may be variable because of sample heterogeneity,

  • Removal of sulfur and ash from coal using molten caustic

    removal in both of coal samples. Pyritic sulfur removal was achieved at higher percentage than organic sulfur, but it could be said that the degree of degradation depends on the nature and composition of coal because of the closeness of sulfur removal percentage of pyritic and organic sulfur in Hazro coal sample. The removal of ash was aroundClean Coal Technologies (CCT) Coal Education,Four Categories of Clean Coal Technologies. Pre-combustion: These are technologies that are used to clean the coal before it is burned. They include actual physical cleaning or washing, chemical cleaning and new biological methods of cleaning to remove sulfur and ash. All types of coal cleaning are often call coal beneficiation.

  • Sulfur removal from coal KIRKBRIDE; CHALMER G.

    Oct 31, 1978· On completion or substantial completion of sulfur removal from coal according to the invention, the desulfurized coal is recovered and the gas, consisting primarily of hydrogen, hydrogen sulfide, water and ammonia, is treated by known means to 6.2.1. Acid Gas Removal (AGR) netl.doe.gov,While Rectisol is more costly, it is preferred for treating coal-based syngas because it allows for very deep sulfur removal (<0.1 ppmv H 2 S plus COS), and also because it can remove HCN, NH 3, and many metallic trace contaminants (including iron- and nickel-carbonyls, and mercury) to provide additional catalyst protection.

  • Desulfurisation of coal and oil SlideShare

    Oct 07, 2014· Desulfurisation of coal and oil 1. DESULFURISATION OF COAL AND OIL Abhilasha 2. COAL Coal can contain up to 10% sulfur by weight, although values of 1- 4% are more typical depending on the region where the coal was extracted.Study of sulfur behavior and removal during thermal,STUDYOFSULFURBEHAVIORAND REMOVALDURINGTHERMAL DESULFURIZATIONOFILLINOISCOALS KeithC.Hackley•RobertR.Frost Chao-LiLiu•StevenJ.Hawk•DennisD.Coleman ILLINOISGEOLOGICAL SURVEYLICRAXY HAR5m CIRCULAR545 1990 ILLINOISSTATEGEOLOGICALSURVEY MorrisW.Leighton,Chief

  • ORGANIC SULFUR AND HAP REMOVAL FROM COAL WITH

    removal from coal. With the diminishing supply of low-sulfur coal and with more restrictions imposed on the use of high-sulfur coal, sulfur removal from coal prior to combustion has become important. Despite numerous attempts to remove sulfur from coal for low-sulfur, clean coal combustionRemoval of pyritic sulfur from coal TRW INC.,Dec 16, 1975· While it is possible to remove pyritic sulfur from coal by froth flotation or washing processes, the selectivity is poor; hence, a large portion of the coal is discarded along with ash and pyrite. Consequently, the solution so far has been to simply burn coal having a low sulfur content.

  • Removal Sulfur Compounds from Coal the Organism

    sulfur removal from coal. The rate of sulfur removal by S. acidocaldarius was strongly dependent on the sulfur content of the coal and on the total external surface area of coal particles. Approximately 96% of inorganic sulfur was removedfrom a5%slurry ofcoal whichhadan initial total sulfur content of4%Activated Carbon For Sulfur Removal, Activated Carbon For,Alibaba offers 257 activated carbon for sulfur removal products. About 31% of these are petroleum additives, 29% are electronics chemicals, and 29% are adsorbent. A wide variety of activated carbon for sulfur removal options are available to you, such as coating auxiliary agents, water treatment chemicals, and petroleum additives.