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Thermally induced structural changes in coal combustion. Final report

Flagan, R. C. and Gavalas, G. R. (1992) Thermally induced structural changes in coal combustion. Final report. .

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The effects of the temperature-time history during coal devolitization and oxidation on the physical properties and the reactivity of resulting char were studied experimentally for temperatures and residence times typical of pulverized combustion. Experiments were also carried out at somewhat lower temperatures and correspondingly longer residence times. An electrically heated laminar flow reactor was used to generate char and measure the rates of oxidation at gas temperatures about 1600K. Partially oxidized chars were extracted and characterized by gas adsorption and mercury porosimetry, optical and scanning electron microscopy, and oxidation in a thermogravimetric analysis system (TGA). A different series of experiments was conducted using a quadrople electrodynamic balance. Single particles were suspended electrodynamically and heated by an infrared laser in an inert or oxygen-containing atmosphere. During the laser heating, measurements were taken of particle mass, size/shape, and temperature.

Item Type:Report or Paper (Technical Report)
Related URLs:
URLURL TypeDescription
Flagan, R. C.0000-0001-5690-770X
Gavalas, G. R.0000-0003-1468-6835
Additional Information:© 1992. Work Performed Under Grant No. DE-FG22-88PC88911.
Funding AgencyGrant Number
Department of Energy (DOE)FG22-88PC88911
Record Number:CaltechAUTHORS:20151105-120142265
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:61897
Deposited By: Ruth Sustaita
Deposited On:06 Nov 2015 20:01
Last Modified:10 Nov 2021 22:55

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