Jan 01, 1996 The coal used was obtained from the Illinois State Geological Survey Therocoupte Vent Val, ve Pressure Tronsducer Figure 1 Autoclave assembly 26 Fuel 1996 Volume 75 Number 1 Coal beneficiation and organic sulfur removaL S. Meffe et al. an Illinois Basin coal, IBC-101, with 4.3 wt total sulfur and 3.0 wt organic sulfur both db.
OSTI.GOV Technical Report Removal of organic and inorganic sulfur from Ohio coal by combined physical and chemical process. Final report
OSTI.GOV Technical Report Laboratory study for removal of organic sulfur from coal. Quarterly technical progress report
The problems in the determination of organic sulfur in coal underline the need for new methods. Several approaches have been investigated 14-17, but more work is necessary for full development. In our work, the removal of organic sulfur from coal was followed
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 use of chemical cleaning methods.
Organic sulfur in coal is covalently bound into large and complex ... disadvantage because it is unable to remove organic sulfur in coal. The chemical desulfurization method produces better results than ... investigated the biomining method employed in coal bio beneficiation, also referred to as clean coal technology, by using
can effectively remove much of organic sulfur from high organic sulfur asphaltites. The effect of leaching the coal samples with molten caustic on the removal of sulfur as pyritic and organic, ash and volatile matter was discussed considering the ratio of NaOH to coal, leaching time and temperature. The ash reduction ranges from 17.97 to
The 30-40 organic desulfurization barrier was studied for possible inhibitors to organic sulfur removal from coal. Key words Coal desulfurization Organic sulfur Thermophiles Introduction amounts of sulfates. Organic sulfur is found as thiols or mercaptans, sulfides or thio-ethers, US coal production is expected to increase disulfides and ...
Abstract This paper presents the results of pilot-scale studies of sulfur and ash removal from coal by high gradient magnetic separation HGMS. Work was done on both the liquefied coal and the raw pulverized coal in water slurries. The effects of residence time, field intensity, packing material and density, slurry concentration and recycle on the grade and recovery of the wet separation of ...
OSTI.GOV Conference Chemical removal of organic sulfur from coal. Chemical removal of organic sulfur from coal. Full Record Other Related Research
The removal of sulfur from coal by methanol has been investigated in a 300 ml batch reactor. The Illinois IBC-108 coal used is highly beneficiated and contains mainly organic sulfur, the results are, therefore, also applicable to organic sulfur removal. Temperature, reaction time and the amount of methanol increased sulfur removal, while the amount of coal used decreased it.
CiteSeerX - Document Details Isaac Councill, Lee Giles, Pradeep Teregowda During beneficiation of coal at the coal mining area of Tula, Russia, huge amounts of coal wastes are produced with a high residual pyrite content. These wastes which are usually disposed of without specific care in the environment are considered as active sources of acidic water generation which severely contaminates ...
the pyrite sulde and organic sulde forms of sulfur in coal were signicantly removed. Saikia et al.24 used BmimBF 4 and BmimCl, mixing them with 13.2 mL of 20 HCOOH and 75 mL of 20 H 2 O 2, to remove sulfur in coal at 7080 C temperature, and obtained 50.20 removal of the total sulfur and 48 of the organic sulfur.
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.
Influence of temperature on pyritic and organic sulfur removal from lignite and coal samples are shown in Tables 4-6. Samples of Lignite-1, -2, and -3 were subjected to desulfurization under the same conditions except that the temperature was held at 425 K. By this process 33.1, 35.3, and 37.2 of total sulfur contents 52.3, 53.6, and
M ssbauer study of the inorganic sulfur removal from coals Fig. 1 SEM images of a general view of beneficiated coal product left side and precipitated coal product right side by hydrocyclonic separation process.In the circles were identified clusters of grains of pyrite Fig. 2 EDX spectra associated with the grains of pyrite FeS2identified in the Fig. 1
Apr 01, 1994 Removal of all the organic sulfur from coal will not be easy or inexpensive. However, demonstrated practical methods exist for removal of much of the mineral sulfur, and chemical processes for removal of the aliphatic sulfur structures may be feasible. ... Technol. 1992, 30, 109 55 Otisca Industries Ltd. Coal Beneficiation Process, 1982 56 ...
beneficiation of high volatile bituminous coal with ... removal of a small amount of organic sulfur, most of the inorganic sulfur, and a substantial amount of ash. ... 50 organic sulfur from some Assam coal samples by chlorinolysis in aqueous medium. But chlorine is a
Although the inorganic sulfur component of coal can be removed with other mineral matter, the organic sulfur is chemically bonded to the coal and is not amenable to physical separation. Biological and chemical methods for sulfur removal so far have not been promising for commercial-scale application.
Oct 15, 2019 The throughput of high-ash and high-sulfur fine-grain coal 06 mm increases year by year.The serious problem of direct combustion is the formation of acid rain and smog.Therefore, the pre-combustion desulfurization and ash reduction can reduce environmental pollution. A combined process of dry separation and microwave desulfurization for the cleaning of the 06 mm fine coal was applied.
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.
Coal beneficiation has centered on two areas physical and chemical. Now, there is a third area biological. ... Sulfur chemically combined with the carbon in coal, or organic sulfur, cannot be removed by physical cleaning, nor can nitrogen be removed. Chemical cleaning is used to remove organic sulfur from the coal.
dioxide ScWC all can effectively extract about 50 of total sulfur from bituminous coal in one hour. Extraction above 350 decreased effectiveness, and extraction above the supercritical point of pure water caused polymerization presumably due to hydrothermal carbonization. Elimination of organic sulfur may play a role in the polymerization.
Coal samples were analyzed for sulfur and ash by the standard ASTM procedures 10. Materials. Coal from two Iowa strip mines was used for this ... organic 0.99 3.53 total 3.45 6.94 ... Coal Beneficiation A Comparison of Coal Beneficiation Methods ...