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Sulfur is a component of coal and other gasification feed stocks. Resulting sulfur compounds in syngas need to be removed in most gasification applications due to environmental regulations or to avoid catalyst poisoning. Whether it is electricity, liquid fuels, or some other product being output, sulfur emissions are regulated, and sulfur removal is important for this reason, along with the ...
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.
Selective Removal Of Organic Sulfur From . 1988-7-25desulfurization of coal involves the removal of both the inorganic and organic forms of sulfureveral 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 use of chemical cleaning.
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.
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.
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 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.
Jul 31, 1979· Processes for removing sulfur from coal by chemical leaching operations are well known. Examples of such processes are TRW's Meyer's process (U.S. Pat. No. 3,768,988) and Battelle's hydrothermal process. Although each of these processes is capable of removing significant quantities of sulfur from coal, they each suffer significant disadvantages.
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.
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.
Nov 01, 2011· Read "Sulfur removal in coal tar pitch by oxidation with hydrogen peroxide catalyzed by trichloroacetic acid and ultrasonic waves, Fuel" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
A process for reducing the amount of free and combined sulfur, such as pyritic, organic or elemental sulfur in coal; removing of these sulfur species may be made in an acid, basic or neutral solutions; at least 50 percent and up to 90 percent of sulfur, by weight, originally present in coal may be removed.
Sulfur removal during combustion of coal or low-temperature coal char using excess air in a fluidized bed of dolomite has been demonstrated in a continuous bench-scale unit. The SO2 produced during the combustion is fixed as CaSO4 by reaction with CaO in the dolomite as follows: CaO + SO2 + ½ O2 = CaSO4. The ranges of conditions explored were calcium oxide-to-feed sulfur mol ratios in the ...
Read chapter 10 Some Methods of Reducing Sulfur Oxides from Power Plants: Air Quality and Stationary Source Emission Control...
Two-stage coal flotation to remove pyritic sulfur, arsenic, selenium and mercury. Mining, Metallurgy & Exploration 2013, 30 (3), 162-168. DOI: 10.1007/BF03402263. Lei Yang, Wenshou Sun, Yang Jiang, Lei Zhu, Jie Gao. Parameter Effects on SO2 Removal with Coal .
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) 8
Up to 33.2% of the total sulfur, which includes almost all the organic sulfur, was removed at a temperature of 475°C and a residence time of 6 min using a coal particle size of 4-35 mesh.
STUDYOFSULFURBEHAVIORAND REMOVALDURINGTHERMAL DESULFURIZATIONOFILLINOISCOALS KeithC.Hackley•RobertR.Frost Chao-LiLiu•StevenJ.Hawk•DennisD.Coleman ILLINOISGEOLOGICAL SURVEYLICRAXY HAR5m CIRCULAR545 1990 ILLINOISSTATEGEOLOGICALSURVEY MorrisW.Leighton,Chief .
Sulfur Technology Center. Bechtel's Sulfur Technology Center coordinates the sulfur removal and recovery technology applications in gas processing, refining, gasification, power generation, and other related industries.
Flue-gas desulfurization (FGD) is a set of technologies used to remove sulfur dioxide (SO 2) from exhaust flue gases of fossil-fuel power plants, and from the emissions of other sulfur oxide emitting processes such as waste incineration
Method Of Removal Of Sulfur From Coal And Petroleum . 2017-8-18 · Method of removal of sulfur from coal and petroleum products Abstract A method for the removal of sulfur from sulfur-bearing materials such as coal and petroleum products using organophosphine and .
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. The only recourse is to capture the sulfur, either before the coal is burned using a coal-cleaning process,.
1988-7-25desulfurization of coal involves the removal of both the inorganic and organic forms of sulfureveral physical methods are available for the removal of inorganic sulfur which is normally represented by pyritic and sulfatic sulfur removal of organic sulfur .
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 use of chemical cleaning methods.
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