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coal beneficiation and organic sulfur removal

Coal beneficiation and organic sulfur removal - ScienceDirect

Jan 01, 1996 · The coal used was obtained from the Illinois State Geological Survey: Ther~ocoupte Ven't 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).

(PDF) SULFUR REMOVAL FROM COAL BENEFICIATION WASTES

SULFUR REMOVAL FROM COAL BENEFICIATION . WASTES . ... which represents at least half of the total su lfur content in coal. Organic sulfur is more . ... the sulfur removal from coal increases.

The microbial desulfurization of coal

Inorganic sulfur consists mostly of iron sulfides, the so-called "pyritic sulfur," whereas organic sulfur is covalently bound to the carbon atoms of the coal macromolecule. Comminution of coal to sizes that liberate the iron sulfide grains makes their removal with mineral beneficiation processes theoretically possible, but practically profitless.

Correction to: Beneficiation of coal using supercritical ...

高达10%返现 · May 29, 2020 · Organic sulfur is found in coal as mercaptans (RSH), disulfides (RS-S-R’), sulfides (R-S-R’), and thiophenes (heterocyclic). Organic sulfur is thus integrated into the carbon structure and difficult to remove. Oxidative ions convert organic sulfur to sulfates which can be dissolved in water or form sulfur dioxide.

Correction to: Beneficiation of coal using supercritical ...

Organic sulfur is found in coal as mercaptans (RSH), disulfides (RS-S-R’), sulfides (R-S-R’), and thiophenes (heterocyclic). Organic sulfur is thus integrated into the carbon structure and difficult to remove. Oxidative ions convert organic sulfur to sulfates which can be dissolved in water or form sulfur dioxide. RSH þ H 2O ! ROH þ H ...

(PDF) Beneficiation of coal using supercritical water and ...

Current sulfur removal technologies for coal beneficiation ... In this paper, the morphological changes of organic sulfur in coal during low-temperature oxidation were studied first, and then the ...

Beneficiation of coal using supercritical water and carbon ...

Keywords Coal Supercritical Sulfur Beneficiation Cleaning Extraction 1 Introduction Despite recent emergence of natural gas, nuclear, solar, and wind power, coal remains an important energy source to the United States and the world. For example, in 2018, 27.4% of the United States energy demand was met by burning coal, while for the world the ...

10.1016/0016-2361(95)00171-9 | DeepDyve

Jun 11, 2020 · Second, methanol begins to decompose at 400°C, and Figure 1 Autoclave assembly 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).

The microbial desulfurization of coal

Inorganic sulfur consists mostly of iron sulfides, the so-called "pyritic sulfur," whereas organic sulfur is covalently bound to the carbon atoms of the coal macromolecule. Comminution of coal to sizes that liberate the iron sulfide grains makes their removal with mineral beneficiation processes theoretically possible, but practically profitless.

(PDF) Beneficiation of coal using supercritical water and ...

Current sulfur removal technologies for coal beneficiation ... In this paper, the morphological changes of organic sulfur in coal during low-temperature oxidation were studied first, and then the ...

How to Remove Sulphur from Coal

Sep 01, 2017 · Reducing the inorganic sulfur in coal to tolerable limits by physical beneficiation, including flotation, as now practiced, still is relatively inefficient and has not kept pace with the more sophisticated physical beneficiation approaches employed by the nonfuel minerals industry in general.

Coal Beneficiation using Methanol - ScienceDirect

Jan 01, 1993 · A study of total sulfur removal from Illinois coals with methanol as the solvent, combining extraction and reaction, has been conducted. The coals hav

Coal Beneficiation - an overview | ScienceDirect Topics

Joan S. Esterle, in Applied Coal Petrology, 2008 3.7.2 Mineral and Trace Element Partitioning. As noted, one of the fundamental reasons for coal beneficiation is the reduction of ash yield and deleterious minerals and elements with an inorganic affinity. The partitioning of major, minor, and trace elements depends on the degree of liberation of the minerals, their inorganic versus organic ...

US4492588A - Method for removing sulfur from fossil fuels ...

A process for removal of sulfur from fossil fuels, such as coal, lignite, peat and fuel oil. The process includes the oxidative treatment of the fuel at or about ambient temperature, followed by a wash with a dilute basic aqueous solution of a basic compound of alkali metal or alkaline earth metal at or about ambient temperature. Upon burning of the fuel, a large amount of the sulfur is ...

Desulfurization of high sulfur fine coal using a novel ...

Oct 15, 2019 · The throughput of high-ash and high-sulfur fine-grain coal (0–6 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 0–6 mm fine coal was applied.

Oxidative chemical beneficiation of low-quality coals ...

Apr 01, 2021 · The present ultrasonic treatment influenced the coal particles, prompting breakage because of cavitation accompanied by the expulsion of sulfur compounds present in raw coal samples .During ultrasonication, hydrogen and hydroxyl radicals responsible for the oxidation of coal are produced in the H 2 O 2 medium , , .On oxidation, the sulfur components of coal convert to sulfoxide, sulfone,

Feasibility studies on cleaning of high sulfur coals by ...

Aug 01, 2015 · Coal has been used as an energy resource around the world, primarily for the generation of electricity. The cleaning of coal by removing its unwanted sulfur and mineral matter components is utmost essential before their gainful utilizations. The ionic liquids (ILs) are considered as non-toxic solvents for using in different industrial processes. The effect of two ILs namely, 1-n-butyl, 3 ...

Oxidative desulfurization of coal (Journal Article) | OSTI.GOV

The most promising method involves contacting an aqueous slurry of coal with air at pressures up to 1000 psi and temperatures of 140/sup 0/ to 200/sup 0/C. Coals from different geographic areas of the US have been treated with air and water in this way, resulting in removal of more than 90% of pyritic sulfur and up to 40% of organic sulfur as ...

US3926575A - Removal of pyritic sulfur from coal - Google ...

Finely divided coal or coal derivatives, containing pyrite, are reacted with sulfurous acid (the oxidizing agent); if desired, HCl may also be used to improve the reaction efficiency to remove pyritic sulfur from coal as shown by the following equations: Primary: Oxidation - reduction 4 FeS2 (pyrite) +3SO2 + 12 HCl -> 4 FeCl3 + 11S + 6 H2O Secondary: Oxidation - reduction 4 FeCl3 + FeS2 ...

Anti Perkson – Vikipeedia

Coal Beneficiation and Organic Sulfur Removal (kaasautorid S. Meffe, A. Trass). // Fuel 75 (1996) Electron impact mass spectrometric studies of 2-methyl, 2-phenyl, 2-(1-piperidyl), 2-(2/3/4-pyridyl), piperidino and pyrido[4,3­D]pyrimidin-4-ones (kaasautor).

Before And After Coal Beneficiation

Before And After Coal Beneficiation Home Before And After Coal Beneficiation PEW series Jaw crusher features big crushing ratio, reliable operation, easy maintenance and low operating cost.

Removal of organic and inorganic sulfur from Ohio coal by ...

OSTI.GOV Technical Report: Removal of organic and inorganic sulfur from Ohio coal by combined physical and chemical process. Final report

Optimization of Coal Beneficiation Plans for SO2 Emissions ...

Organic sulfur, which forms an integral part of the coal matrix, and may comprise 30—70 percent of the total sulfur content, can be removed only by chemical processing. This paper describes a newly developed analytical model of conventional coal cleaning plants, designed to estimate the cost and capability of coal cleaning for removing sulfur ...

BENEFICIATION OF COAL USING SUPERCRITICAL WATER

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.

CHEMICAL BENEFICIATION OF LOW GRADE COAL - A REVIEW

Physical beneficiation of coal is not very effective in separation of the finely dispersed ... The role of coal cleaning for the removal of toxic elements was discussed by Akers and Dospoy, 1994 in greater depth. Coal ... elimination of organic sulfur requires in most cases chemical and/or microbial treatment [Palmer et al., 1995]. ...

(PDF) Effective removal of sulfur components from ...

For application of Brazilian clean coal different macerals and minerals, respectively [5,6]. technologies, it is essential to remove the sulfur components from The sulfur components in coal are mainly found in the organic coal before its utilization [1,2].

A Comparison of Coal Beneficiation Methods

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 ...

US3926575A - Removal of pyritic sulfur from coal - Google ...

Finely divided coal or coal derivatives, containing pyrite, are reacted with sulfurous acid (the oxidizing agent); if desired, HCl may also be used to improve the reaction efficiency to remove pyritic sulfur from coal as shown by the following equations: Primary: Oxidation - reduction 4 FeS2 (pyrite) +3SO2 + 12 HCl -> 4 FeCl3 + 11S + 6 H2O Secondary: Oxidation - reduction 4 FeCl3 + FeS2 ...

Desulfurization of high sulfur fine coal using a novel ...

Request PDF | Desulfurization of high sulfur fine coal using a novel combined beneficiation process | The throughput of high-ash and high-sulfur fine-grain coal (0–6 mm) increases year by year.

Effects of alkali treatment on ash and sulphur removal ...

The removal of total sulfur and ash increases with increasing leaching temperature and time. As a result of MCL, ash content of Hazro coal was reduced from 18.31 to 6.77 %, and 70% of combustible ...

The Microbial Desulfurization of Coal coal.

The sulfur forms in coal are primarily divided into two types, i.e. inorganic sulfur and organic sulfur. In most cases, inorganic sulfur is relatively easier to remove than organic sulfur by ...

Coal and clean coal tech. -ill-sec - Coal Education

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

Desulfurization of coal using methanol (Book) | OSTI.GOV

Dec 31, 1996 · Temperature, reaction time and the amount of methanol increased sulfur removal, while the amount of coal used decreased it. Coal pyrolysis was also explored. The best results, a total sulfur removal of 85% (90% for organic) were obtained at 500 C, 60--90 ;min. reaction time and very small amounts of coal, with a weight loss of about 30%.

Process for electrostatic separation of pyrite from crude coal

Electrostatic beneficiation is being investigated as a dry precombustion cleaning method for removing pyritic forms of sulfur from coal. The coal is ground to a fine powder and then electrostatically charged. The pyrite particles adopt a negative charge and the carbon particles a positive charge.

Bench-scale Performance Testing and Economic Analyses Of ...

The sulfur removal was greater for the high- to moderate-sulfur coals than for the very-low-sulfur coals. Ash removal capability of the Tech 1 System was found to be lower than the ash removal capability of the conventional coal preparation plants (see Table 2) This relatively low overall ash removal reflects the very high mineral content of ...