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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 881-883Decomposition Kinetics of Switchgrass: Estimating...

Decomposition Kinetics of Switchgrass: Estimating Activation Energy

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Abstract:

TG analysis was used to investigate the thermal decomposition of switchgrass, which is a potential gasification feedstock. 10 mg switchgrass sample with the particles between 0.45 and 0.70 mm was linearly heated to 873 K at heating rates of 10, 20, 30 K/min, respectively, under high-purity nitrogen. The Kissinger method and three isoconversional methods including Friedman, Flynn-wall-Ozawa, Vyazovkin and Lenikeocink methods were used to estimate the apparent activation energy of switchgrass. With the three isoconversional methods, it can be concluded that the activation energy increases with increasing conversion. The four model free methods reveal activation energies in the range of 70-460 kJ/mol. These activation energy values provide the basic data for the thermo-chemical utilization of the switchgrass.

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Periodical:

Advanced Materials Research (Volumes 881-883)

Pages:

726-733

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.881-883.726

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Online since:

January 2014

Authors:

Gui Ying Xu*, Jiang Bo Wang, Ling Ping Guo, Guo Gang Sun

Keywords:

Apparent Activation Energy, Isoconversional Methods, Model-Free, Switchgrass, TGA

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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