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Journal of Combustion
Volume 2017 (2017), Article ID 6160234, 7 pages
Research Article

Decomposition Characteristics and Kinetics of Microalgae in N2 and CO2 Atmospheres by a Thermogravimetry

1School of Electric Power, South China University of Technology, Wushan Road 381, Tianhe District, Guangzhou City 510640, China
2School of Mechanical and Power Engineering, Guangdong Ocean University, Jiefang Road 40, Xiashan District, Zhanjiang City 524025, China

Correspondence should be addressed to Ma Xiaoqian

Received 20 September 2016; Revised 28 November 2016; Accepted 14 February 2017; Published 15 March 2017

Academic Editor: Kazunori Kuwana

Copyright © 2017 Xu Qing et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The thermal degradation characteristics of microalgae were investigated in highly purified N2 and CO2 atmospheres by a thermogravimetric analysis (TGA) under different heating rates (10, 20, and 40°C/min). The results indicated that the total residual mass in CO2 atmosphere (16.86%) was less than in N2 atmosphere (23.12%); in addition, the kinetics of microalgae in N2 and CO2 atmospheres could be described by the pseudo bicomponent separated state model (PBSM) and pseudo-multi-component overall model (PMOM), respectively. The kinetic parameters calculated by Coats-Redfern method showed that, in CO2 atmosphere, the apparent activation energy () of microalgae was between 9.863 and 309.381 kJ mol−1 and the reaction order () was varied from 1.1 to 7. The kinetic parameters of the second stage in CO2 atmosphere were quite similar to those in N2 atmosphere.