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Sunday, August 2, 2020 | History

1 edition of Comparison of oxidation and reduction methods in the determination of forms of sulfur in coal found in the catalog.

Comparison of oxidation and reduction methods in the determination of forms of sulfur in coal

by J. K. Kuhn

  • 192 Want to read
  • 24 Currently reading

Published in Urbana .
Written in English

    Subjects:
  • Coal,
  • Sulphur content

  • Edition Notes

    StatementJ.K. Kuhn, L.B. Kohlenberger, and Neil F. Shimp
    SeriesIllinois State Geological Survey. Environmental geology notes -- no.66, Environmental geology notes (Illinois State Geological Survey) -- no.66.
    ContributionsKohlenberger, L. B., joint author, Shimp, Neil F, joint author
    The Physical Object
    Pagination11 p. :
    Number of Pages11
    ID Numbers
    Open LibraryOL25388934M
    OCLC/WorldCa2316255

    The sulfhydryl-containing amino acids, Met and Cys, are needed by all life forms for protein synthesis and a myriad other tasks. Under the oxidizing conditions found over most of this planet, sulfur is present in the geosphere in the form of sulfate. Reduction of sulfate is expensive, requiring approximately kJmol −1. The inability of Cited by: 2. Sulfur is an important part of many enzymes and antioxidant molecules such as glutathione and thioredoxin. Sulfur Oxidation. Sulfur oxidation involves the oxidation of reduced sulfur compounds such as sulfide (H 2 S), inorganic sulfur (S 0), and thiosulfate (S 2 O 2 −3) to form sulfuric acid (H 2 SO 4). An example of a sulfur-oxidizing.

    CONTENTS Figures Tables 1. Introduction 2. The Sulfur Oxides: Methods Characterization and Sampling Characterization of sulfur oxides Sulfur oxides emission trends Sampling and analysis methods Considerations In Sulfur Oxides Control Energy availability and usage trends Determining emission reduction needs Technical considerations Environmental and energy. Sulfur (in British English, sulphur) is a chemical element with the symbol S and atomic number It is abundant, multivalent, and normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formula S tal sulfur is a bright yellow, crystalline solid at room temperature. Sulfur is the tenth most common element by mass in the universe, and the fifth Alternative name: sulphur (British spelling).

      A review of methods for the determination of reduced sulfur compounds (RSCs) in air. Pandey SK(1), Kim KH. Author information: (1)Atmospheric Environment Laboratory, Department of Earth & Environmental Sciences, Sejong University, Seoul , by: The second part describes the application of the method described in Section to liquified coal samples, and the third, Sec- tion , describes the proof-of-principle experimentation for the direct determination of organic sulfur. COAL SULFUR FORMS ANALYSIS WITH INDIRECT DETERMINATION OF ORGANIC SULFUR This analysis procedure is based.


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Comparison of oxidation and reduction methods in the determination of forms of sulfur in coal by J. K. Kuhn Download PDF EPUB FB2

Comparison of oxidation and reduction methods in the determination of forms of sulfur in coal. Urbana, (OCoLC) Document Type: Book: All Authors / Contributors: J K Kuhn; L B Kohlenberger; Neil F Shimp. Comparison of oxidation and reduction methods in the determination of forms of sulfur in coal by Kuhn, J.

K ; Kohlenberger, L. B., joint author ; Shimp, Neil F, joint authorPages: @article{osti_, title = {Annotated bibliography of methods for determining sulfur and forms of sulfur in coal and coal-related materials}, author = {Chriswell, C D and Norton, G A and Akhtar, S S and Straszheim, W E and Markuszewski, R}, abstractNote = {Over published papers, presentations at scientific meetings, and reports relating to the determination of sulfur and sulfur forms Author: C.D.

Chriswell, G.A. Norton, S.S. Akhtar, W.E. Straszheim, R. Markuszewski. Differentiation of organic sulfur forms in coal by step-wise oxidation with a mixture of perchloric acid (HClO 4) and ferric perchlorate (Fe(ClO 4) 3) was s organic sulfur compounds were oxidized with HClO 4 solution containing Fe(ClO 4) 3, and the amounts of sulfate formed during reaction were compounds can be grouped into three categories according to their Cited by: 9.

The determination limit for sulfur is approximately 50 m g (percent relative standard deviation), which is equivalent to a percent sulfur in g of coal.

INTRODUCTION Methods are described for the determination of total sulfur and of four forms of sulfur in coal (fig. 16): monosulfide (S =), sulfate sulfur (S0 4 =), pyritic sulfur. Analytical Methods for Sulfur Determination in Glasses, Rocks, Minerals and Fluid Inclusions Chapter (PDF Available) in Reviews in Mineralogy and Geochemistry 73(1) June with 3, Reads.

These test methods cover two alternative procedures for the determination of total sulfur in samples of coal and coke. Sulfur is included in the ultimate analysis of coal and coke.

Formerly under the jurisdiction of Committee D05 on Coal and Coke, these test methods were withdrawn in December and replaced by D Test Method for Sulfur in. The major forms of sulfur in coal are pyritic, organic, and sulfate sulfur.

Pyritic and organic sulfur generally account for the bulk of sulfur in coal. A minor amount of sulfate occurs in weathered coals.

Elemental sulfur in minor to trace amounts also occurs in coal but it is Cited by: This test method provides for a separation of coal-associated sulfur into two commonly recognized forms: pyritic and sulfate.

Organic sulfur is calculated by difference. Results obtained by the test method are used to serve a number of interests, including the evaluation of coal preparation and processing operations designed to reduce coal.

taken for the determination of total sulphur. In neutron/proton activation analysis sample can be in solid form. In the analytical methods wherein S02 or HzS are monitored, the solid sample is directly oxidised or reduced at high temperatures in presence of oxygen or moist Cited by: 2.

Oxidation of Sulfur Determination in Soil. Oxidation of Sulfur Determination in Soil. Skip navigation Contaminant oxidation by activation of persulfate and hydrogen peroxide - Duration: higgins determination ofsulpker aisdcarbon incoal m 1" chemistry ism t.

materials of known sulfur content based on the range of sulfur in each coal or coke sample analyzed. Significance and Use Determination of sulfur is, by definition, part of the ultimate analysis of coal.

Results of the sulfur analysis are used to serve a number of interests: evaluation of File Size: 92KB. Determination of Total Sulfur in Soils and Plants by an Automated Dry Combustion Method Article (PDF Available) in International Journal of Environmental Analytical Chemistry 80(3) July.

reviewed the determination of sulfur forms in coal.(1) However, it was not until the Clean Air Act in that the interest in coal beneficiation and the determination of sulfur forms moved to the forefront of coal chemistry. Coal is an important current energy source and will continue to increase in value as crude oil reserves are by: 1.

Methods are described for the determination of the three commonly recognized forms of sulfur in coal: sulfate sulfur, pyritic sulfur, and organic sulfur. Sulfate sulfur is determined by extracting a weighed sample of coal with dilute hydrochloric acid followed by precipitation of the sulfate with barium chloride and weighing as barium sulfate.

Only three forms of sulfur (sulfatic, pyritic, and organic) are distinguished by the widely-used analytical procedure to determine forms of sulfur in coal, American Society for Author: K. Hackley, C. Liu, D. Coleman, C. Kruse. Coal sampling and analysis standards 4 Abstract Each year, billions of tonnes of coal are traded in regional and international market for use in power generation, steel and cement making, and many other purposes.

In commercial operations, the price of coal not only. For many purposes, a knowledge of the total sulfur content of a coal is sufficient, but for certain work it is also necessary to know how the sulfur is distributed between the coal substance and the mineral matter. In particular, such information may be required in connection with coal classification and cleaning.

This paper selects two typical compounds containing organic sulfur as model compounds. Then, by analyzing the chromatograms of gaseous low-temp oxidation products and GC/MS of the extractable matter of the oxidation residue, we summarizing the mechanism of low-temp sulfur model compound oxidation.

The results show that between 30 °C to 80 °C, the interaction between diphenyl sulfide and Cited by: 8. After low-temp oxidation, the form of organic sulfur changes. The sulfide sulfur is oxidized to the sulfoxide, and then the sulfoxide is further oxidized to a sulfone, and these steps can be easily carried out under experimental conditions.

What's more, the results illustrate that oxidation promotes sulfur element enrichment on the surface of by: 8.Evaluation of the Removal of Organic Sulfur from Coal Abstract As the removal of sulfur from coal prior to combustion acquires more importance in order to meet evermore stringent antipollution regulations, research on the development of methods for the cleaning of coal continues to by: Home › ComplianceOnline Standards › ISO ICS 73 MINING AND MINERALS › Coal -- Determination of forms of sulfur Document Number: ISO File Size: MB Language: English Provider: ANSI Shipping: Available for download - Link will be provided in My ComplianceOnline section.