Further studies of the effects of oxidation on the surface properties of coal and coal pyrite

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The objective of this research was to investigate the oxidation behavior of coal and coal pyrite and to correlate the changes in the surface properties induced by oxidation, along with the intrinsic physical and chemical properties of these organic and inorganic materials, with the behavior in physical coal cleaning processes. This provide more fundamental knowledge for understanding the way in which different factors interact in a medium as heterogeneous as coal. Fourteen coal samples of different ranks ranging from high to medium sulfur content were studied by dry oxidation tests at different temperatures and humidities, and by wet oxidation tests … continued below

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239 p.

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Herrera, Miguel Nicholas December 31, 1994.

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This thesis or dissertation is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by the UNT Libraries Government Documents Department to the UNT Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 22 times. More information about this document can be viewed below.

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The objective of this research was to investigate the oxidation behavior of coal and coal pyrite and to correlate the changes in the surface properties induced by oxidation, along with the intrinsic physical and chemical properties of these organic and inorganic materials, with the behavior in physical coal cleaning processes. This provide more fundamental knowledge for understanding the way in which different factors interact in a medium as heterogeneous as coal. Fourteen coal samples of different ranks ranging from high to medium sulfur content were studied by dry oxidation tests at different temperatures and humidities, and by wet oxidation tests using different oxidizing agents. The concentration of surface oxygen functional groups was determined by ion-exchange methods. The changes in the coal composition with oxidation were analyzed by spectroscopic techniques. The wettability of as-received and oxidized coal and coal pyrite samples was assessed by film flotation tests. The electrokinetic behavior of different coals and coal pyrite samples was studied by electrokinetic tests using electrophoresis. Possible oxidation mechanisms have been proposed to explain the changes on the coal surface induced by different oxidation treatments.

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239 p.

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OSTI; NTIS; GPO Dep.

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  • Other Information: TH: Thesis (Ph.D.)

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  • Other: DE95006248
  • Report No.: DOE/PC/90287--T15
  • Grant Number: FG22-90PC90287
  • Office of Scientific & Technical Information Report Number: 10110773
  • Archival Resource Key: ark:/67531/metadc1276307

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  • December 31, 1994

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  • Oct. 12, 2018, 6:44 a.m.

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  • March 25, 2020, 6:21 p.m.

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Herrera, Miguel Nicholas. Further studies of the effects of oxidation on the surface properties of coal and coal pyrite, thesis or dissertation, December 31, 1994; Berkeley, California. (https://digital.library.unt.edu/ark:/67531/metadc1276307/: accessed May 27, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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