Characterization of porosity via secondary reactions. Quarterly technical progress report, 1 July 1995--1 October 1995

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Description

The following was accomplished during the reporting period: The random pore model was extended to correlate the development of microporosity in resin and Wyodak coal char. Conclusions derived from this analysis include: the random pore model can be extended to microporosity development for chars which are initially (i.e., at zero burn-off) microporous, assuming a normal micropore volume distribution. The resultant mean pore radius and variance prior to oxidation were, respectively, 1.04 nm and 0.24 nm for Wyodak coal char, and 0.64 nm and 0.18 nm for resin char. Consequently, the pore size is larger, and the pore distribution is broader ... continued below

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19 p.

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Calo, J.M. & Zhang, L. December 31, 1995.

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Description

The following was accomplished during the reporting period: The random pore model was extended to correlate the development of microporosity in resin and Wyodak coal char. Conclusions derived from this analysis include: the random pore model can be extended to microporosity development for chars which are initially (i.e., at zero burn-off) microporous, assuming a normal micropore volume distribution. The resultant mean pore radius and variance prior to oxidation were, respectively, 1.04 nm and 0.24 nm for Wyodak coal char, and 0.64 nm and 0.18 nm for resin char. Consequently, the pore size is larger, and the pore distribution is broader for Wyodak coal char than for resin char prior to activation. The rate of mean micropore radius decrease with burn-off at high conversion is slower for resin char than for Wyodak coal char. This result suggests that the percentage of micropores converted to larger pores is smaller for resin char than for Wyodak coal char; i.e., resin char remains more microporous with burn-off. The nonmicroporous surface area was estimated by difference from the total surface area as determined from nitrogen adsorption data. These values correlate reasonably well with nonmicroporous surface areas determined from the {alpha}{sub s}-plot method.

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19 p.

Notes

OSTI as DE96008828

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  • Other Information: PBD: [1995]

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  • Other: DE96008828
  • Report No.: DOE/PC/91305--16
  • Grant Number: FG22-91PC91305
  • DOI: 10.2172/211425 | External Link
  • Office of Scientific & Technical Information Report Number: 211425
  • Archival Resource Key: ark:/67531/metadc668520

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  • December 31, 1995

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  • June 29, 2015, 9:42 p.m.

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  • Nov. 19, 2015, 12:21 p.m.

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Calo, J.M. & Zhang, L. Characterization of porosity via secondary reactions. Quarterly technical progress report, 1 July 1995--1 October 1995, report, December 31, 1995; United States. (digital.library.unt.edu/ark:/67531/metadc668520/: accessed September 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.