Journal
BIORESOURCE TECHNOLOGY
Volume 177, Issue -, Pages 41-50Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2014.11.061
Keywords
Thermogravimetric analysis; Pyrolysis; Kinetic study; Chlorella pyrenoidosa; Bloom-forming cyanobacteria
Funding
- National High Technology Research and Development Program (863 Program) of China [2012AA101809]
- Fundamental Research Funds for the Central Universities, HUST [Cxy13q030.cx14-011.cx14-012.01-09-070098]
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The pyrolysis process of two microalgae, Chlorella pyrenoidosa (CP) and bloom-forming cyanobacteria (CB) was examined by thermo-gravimetry to investigate their thermal decomposition behavior under non-isothermal conditions. It has found that the pyrolysis of both microalgae consists of three stages and stage II is the major mass reduction stage with mass loss of 70.69% for CP and 64.43% for CB, respectively. The pyrolysis kinetics of both microalgae was further studied using single-step global model (SSGM) and distributed activation energy model (DAEM). The mean apparent activation energy of CP and CB in SSGM was calculated as 143.71 and 173.46 kJ/mol, respectively. However, SSGM was not suitable for modeling pyrolysis kinetic of both microalgae due to the mechanism change during conversion. The DAEM with 200 first-order reactions showed an excellent fit between simulated data and experimental results. (C) 2014 Elsevier Ltd. All rights reserved.
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