Title page for ETD etd-10312009-020158
|Type of Document
||Albright, Eric V. B.
||Activation energy of Douglas fir char gasification by carbon dioxide
||Master of Science
|Jaasma, Dennis R..
|Stern, Curtis H.
|Roby, Richard J.
|Date of Defense
The activation energy of Douglas ftr wood char gasified in carbon dioxide was determined. Activation
energies were found for chars that had been pyrolyzed in nitrogen at 600, 750, and 900°C.
A thermogravimetric analyzer provided the weight versus temperature data used to obtain the activation
energies. The Coats-Redfern integral method of kinetic analysis was used to extract the
activation energies from the data. This method can be used to obtain an activation energy from a
single weight versus temperature trace for a constant heating rate. An overall apparent activation
energy of 723 ± 60 kl/mole and a natural log of the pre exponential factor of 68.8 ± 6.2 was determined
from the data collected for all three chars. The different char preparation temperatures
did not appear to affect the activation energy.
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