The use of synchrotron radiation for the analysis of coal combustion products

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An understanding of the chemical composition of such slags under boiler operating conditions and as function of the mineral composition of various coals is the ultimate goal of this program. The experiment involves scanning through the K- or L-shell absorption edge of the element in question. The structure of the absorption edge, consisting of transitions to unoccupied molecular levels, can be compared to those of model compounds for identification. The relative position of the absorption edge can yield information regarding the oxidation state of the element. This portion is the X-ray Absorption Near Edge Structure (XANES) portion of the spectrum. … continued below

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9 pages

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Manowitz, B. & Gordon, B. May 1, 1992.

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This article 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 13 times. More information about this article can be viewed below.

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An understanding of the chemical composition of such slags under boiler operating conditions and as function of the mineral composition of various coals is the ultimate goal of this program. The experiment involves scanning through the K- or L-shell absorption edge of the element in question. The structure of the absorption edge, consisting of transitions to unoccupied molecular levels, can be compared to those of model compounds for identification. The relative position of the absorption edge can yield information regarding the oxidation state of the element. This portion is the X-ray Absorption Near Edge Structure (XANES) portion of the spectrum. The Extended X-ray Absorption Fine Structure (EXFAS) region, extending from about 60 eV above the absorption edge, represents scattering from neighboring constituents and can be used to determine the coordination number of coordination distance of a specific element from its neighboring atoms. The best source of excitation energy for these experiments is an electron storage ring emitting synchrotron radiation (SR). The National Synchrotron Light Source (NSLS) at Brookhaven National Laboratory is a 2.5 GeV storage ring and emits a continuous spectrum of x rays to an energy of about 30 keV. Beam line X-19A is dedicated to XANES and EXAFS and is being adapted to the performance of this investigation.

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9 pages

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OSTI; NTIS; GPO Dep.

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  • Coal preparation, utilization, and environmental control conference, Pittsburgh, PA (United States), 26-31 Jul 1992

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  • Other: DE92016106
  • Report No.: BNL-47609
  • Report No.: CONF-920736--1
  • Grant Number: AC02-76CH00016
  • Office of Scientific & Technical Information Report Number: 5061140
  • Archival Resource Key: ark:/67531/metadc1057108

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  • May 1, 1992

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  • Jan. 22, 2018, 7:23 a.m.

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  • May 21, 2019, 11:50 a.m.

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Manowitz, B. & Gordon, B. The use of synchrotron radiation for the analysis of coal combustion products, article, May 1, 1992; Upton, New York. (https://digital.library.unt.edu/ark:/67531/metadc1057108/: accessed June 8, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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