Char particle fragmentation and its effect on unburned carbon during pulverized coal combustion. Quarterly report, July 1, 1995--September 30, 1995

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Description

This project is intended to satisfy, in part, PETC`s research efforts to understand the chemical and physical processes that govern coal combustion. The work is pertinent to the char oxidation phase of coal combustion and focuses on how the fragmentation of coal char particles affects overall mass loss rates and how char fragmentation phenomena influence coal conversion efficiency. The knowledge and information obtained allows the development of engineering models that can be used to predict accurately char particle temperatures and total mass loss rates during pulverized coal combustion. In particular, the work provides insight into causes of unburned carbon in ... continued below

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29 p.

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Mitchell, R.E. September 13, 1996.

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

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Description

This project is intended to satisfy, in part, PETC`s research efforts to understand the chemical and physical processes that govern coal combustion. The work is pertinent to the char oxidation phase of coal combustion and focuses on how the fragmentation of coal char particles affects overall mass loss rates and how char fragmentation phenomena influence coal conversion efficiency. The knowledge and information obtained allows the development of engineering models that can be used to predict accurately char particle temperatures and total mass loss rates during pulverized coal combustion. In particular, the work provides insight into causes of unburned carbon in the ash of coal-fired utility boilers and furnaces. The information reported is for the period July I to September 30, 1995, although the actual work was performed over an extended period of time, from July 1, 1995 to August 1996. During this period, activities were undertaken in Task 3, char fragmentation studies, and Task 4, fragmentation modeling. Partially reacted chars were extracted from the laminar flow reactor at selected residence times and analyzed to determine extents of mass loss and particle size distributions and the particle population balance model was modified to take into account density variations for each size class of particles considered in the model.

Physical Description

29 p.

Notes

OSTI as DE97050625

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  • Other Information: PBD: 13 Sep 1996

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  • Other: DE97050625
  • Report No.: DOE/PC/92528--T2
  • Grant Number: FG22-92PC92528
  • DOI: 10.2172/415975 | External Link
  • Office of Scientific & Technical Information Report Number: 415975
  • Archival Resource Key: ark:/67531/metadc688800

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  • September 13, 1996

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  • July 25, 2015, 2:20 a.m.

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  • Nov. 10, 2015, 8:35 p.m.

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Mitchell, R.E. Char particle fragmentation and its effect on unburned carbon during pulverized coal combustion. Quarterly report, July 1, 1995--September 30, 1995, report, September 13, 1996; United States. (digital.library.unt.edu/ark:/67531/metadc688800/: accessed September 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.