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Effect of Char Formation Temperature on the Densification of a Bituminous Coal Char during Gasification

Wong, Brian A. and Gavalas, George R. and Flagan, Richard C. (1995) Effect of Char Formation Temperature on the Densification of a Bituminous Coal Char during Gasification. Energy and Fuels, 9 (3). pp. 493-499. ISSN 1520-5029. https://resolver.caltech.edu/CaltechAUTHORS:20151007-090426421

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Abstract

It has been observed that some porous carbon particles shrink when oxidized under kinetically limited conditions, instead of reacting at constant diameter, as expected. This study was performed to determine whether or not char from PSOC 1451 coal prepared at different temperatures would also shrink during low-temperature gasification. Coal chars, formed at 1200 and 1600 K, were levitated in the electrodynamic balance and heated with a carbon dioxide laser. The 1200 K char did shrink, as observed in the previous study, while the 1600 K char reacted at constant diameter, as expected under the kinetically limited conditions. These results demonstrate that the time and temperature history of a char influence its behavior during subsequent oxidation.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/ef00051a014DOIArticle
http://pubs.acs.org/doi/abs/10.1021/ef00051a014PublisherArticle
ORCID:
AuthorORCID
Gavalas, George R.0000-0003-1468-6835
Flagan, Richard C.0000-0001-5690-770X
Additional Information:© 1995 American Chemical Society. Received September 6, 1994. This work was supported by the U.S. Department of Energy University Coal Research Program under grant DE-FG22-89PC89765.
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG22-89PC89765
Issue or Number:3
Record Number:CaltechAUTHORS:20151007-090426421
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20151007-090426421
Official Citation:Effect of Char Formation Temperature on the Densification of a Bituminous Coal Char during Gasification Brian A. Wong, George R. Gavalas, and Richard C. Flagan Energy & Fuels 1995 9 (3), 493-499 DOI: 10.1021/ef00051a014
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:60847
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:13 Oct 2015 22:13
Last Modified:03 Oct 2019 09:01

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