MECHANISMS AND OPTIMIZATION OF COAL COMBUSTION

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The completed research project has made some significant contributions that will help us meet the challenges outlined in the previous section. One of the major novelties of our experimental approach involves the application of video microscopy and digital image analysis to study important transient phenomena (like particle swelling and ignitions) occurring during coal pyrolysis and combustion. Image analysis was also used to analyze the macropore structure of chars, a dominant factor in determining char reactivity and ignition behavior at high temperatures where all the commercial processes operate. By combining advanced experimental techniques with mathematical modeling, we were able to achieve ... continued below

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139 pages

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Zygourakis, Kyriacos October 31, 2000.

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Description

The completed research project has made some significant contributions that will help us meet the challenges outlined in the previous section. One of the major novelties of our experimental approach involves the application of video microscopy and digital image analysis to study important transient phenomena (like particle swelling and ignitions) occurring during coal pyrolysis and combustion. Image analysis was also used to analyze the macropore structure of chars, a dominant factor in determining char reactivity and ignition behavior at high temperatures where all the commercial processes operate. By combining advanced experimental techniques with mathematical modeling, we were able to achieve the main objectives of our project. More specifically: (1) We accurately quantified the effect of several important process conditions (like pyrolysis heating rate, particle size, heat treatment temperature and soak time) on the combustion behavior of chars. These measurements shed new light into the fundamental mechanisms of important transient processes like particle swelling and ignitions. (2) We developed and tested theoretical models that can predict the ignition behavior of char particles and their burn-off times at high temperatures where intraparticle diffusional limitations are very important.

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139 pages

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OSTI as DE00789667

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  • Other Information: PBD: 31 Oct 2000

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  • Report No.: FG22-96PC96214--07
  • Grant Number: FG22-96PC96214
  • DOI: 10.2172/789667 | External Link
  • Office of Scientific & Technical Information Report Number: 789667
  • Archival Resource Key: ark:/67531/metadc717823

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Office of Scientific & Technical Information Technical Reports

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  • October 31, 2000

Added to The UNT Digital Library

  • Sept. 29, 2015, 5:31 a.m.

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  • March 30, 2016, 7:29 p.m.

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Zygourakis, Kyriacos. MECHANISMS AND OPTIMIZATION OF COAL COMBUSTION, report, October 31, 2000; Pittsburgh, Pennsylvania. (digital.library.unt.edu/ark:/67531/metadc717823/: accessed October 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.