Abstract
Thermogravimetric analysis and differential thermal analysis were employed to investigate combustion characteristics of two low-lipid microalgae, Chlorella pyrenoidosa (CP) and Spirulina platensis (SP) and iso-conversional Starink approach was used to calculate the kinetic parameters in the present study. The results showed that three stages of mass loss, including dehydration, devolatilization and char oxidation, were observed during combustion of both of two low-lipid microalgae. The whole weight loss of combustion of two microalgae was both shifted to higher temperature zones with increased heating rates from 10 to 40K/min. In the 0.1–0.9 conversion range, the apparent activation energy of CP increased first from 51.96 to 79.53kJ/mol, then decreased to 55.59kJ/mol. Finally, it slightly increased to 67.27kJ/mol. In the case of SP, the apparent activation energy gradually increased from 68.51 to 91.06kJ/mol.
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