title: Thermogravimetric and kinetic analysis of thermal decomposition characteristics of low-lipid microalgae.
abstract: The thermal decomposition behavior of two microalgae, Chlorella pyrenoidosa (CP) and Spirulina platensis (SP), were investigated on a thermogravimetric analyzer under non-isothermal conditions. Iso-conversional Vyazovkin approach was used to calculate the kinetic parameters, and the universal integral method was applied to evaluate the most probable mechanisms for thermal degradation of the two feedstocks. The differential equations deduced from the models were compared with experimental data. For the range of conversion fraction investigated (20-80%), the thermal decomposition process of CP could be described by the reaction order model (F3), which can be calculated by the integral equation of G(α) = [(1 - α)(-2) - 1]/2. And the apparent activation energy was in the range of 58.85-114.5 kJ/mol. As for SP, it can be described by the reaction order model (F2), which can be calculated by the integral equation of G(α) = (1 - α)(-1) - 1, and the range of apparent activation energy was 74.35-140.1 kJ/mol.
authors.affiliation: Key Laboratory of High Efficiency and Clean Mechanical Manufacture, Department of Mechanical Engineering, Shandong University, Jinan 250061, PR China; Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
authors.forename: Chao
authors.initials: C
authors.lastname: Gai
authors.forename: Yuanhui
authors.initials: Y
authors.lastname: Zhang
authors.forename: Wan-Ting
authors.initials: WT
authors.lastname: Chen
authors.forename: Peng
authors.initials: P
authors.lastname: Zhang
authors.forename: Yuping
authors.initials: Y
authors.lastname: Dong
mesh_terms: D002708:Chlorella / Q000737:chemistry; D006358:Hot Temperature; D007700:Kinetics; D008055:Lipids / Q000737:chemistry*; D058086:Microalgae / Q000737:chemistry*; D012044:Regression Analysis; D053545:Spirulina / Q000737:chemistry; D013818:Thermogravimetry / Q000379:methods*
chemical_list: D008055:Lipids
keywords: Apparent activation energy; Chlorella; Kinetic; Spirulina; Thermogravimetric