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

Published
Washington, D.C. : United States. Dept. of Energy, 1995.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
19 pages : digital, PDF file
Additional Creators
Brown University, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
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 α{sub s}-plot method.
Report Numbers
E 1.99:doe/pc/91305--16
doe/pc/91305--16
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Other Subject(s)
Note
Published through SciTech Connect.
12/31/1995.
"doe/pc/91305--16"
"DE96008828"
Zhang, L.; Calo, J.M.
Funding Information
FG22-91PC91305
View MARC record | catkey: 13836149