Oleaginous microorganisms and the thermal decomposition of their recovered lipids are new attractive research fields for the sustainable production of biofuels from actual biomass. In this work, the thermal decomposition of lipids from C. vulgaris and from L. starkeyi was investigated using a thermogravimetric analyzer coupled to a mass spectrometer (TGA-MS) under non-isothermal conditions. Thermal decomposition was examined using the one-step reaction model. Integral, differential, and advanced isoconversional methods were implemented to analyze the conversion-dependent activation energy. The Friedman method resulted in an accurate and reliable estimation of the kinetic parameters. The activation energy showed a strong dependence on conversion from 123.5 to 246 kJ mol^-1 for lipids from C. vulgaris and from 80.3 to 299.9 kJ mol^-1 for lipids from L. starkeyi. The generalized master plot approach evidenced that the thermal decomposition of lipids from C. vulgaris proceeds via three-dimensional diffusion (D₃—Jander’s equation). Also, the kinetic analysis indicated that Valensi’s equation (D₂), controlled by a two-dimensional diffusion model, is the most likely mechanism for the thermal decomposition of lipids from L. starkeyi. The rate parameters were evaluated via a kinetic compensation plot. Ion temperature evolution was investigated by TGA-MS revealing many of the functional groups evolved in the range of 350–500 °C as C1–C7 aliphatic hydrocarbons, aromatic hydrocarbons, aldehydes, carboxylic acids, and furan derivatives. All these aspects favor the lipid biosynthesis from microbial biomass to potential lipid-based building blocks.

含油微生物及其回收脂质的热分解是从实际生物量可持续生产生物燃料的新的有吸引力的研究领域。在这项工作中，使用热重分析仪与质谱仪（TGA-MS）在非等温条件下研究了来自寻常小球藻（C. vulgaris）和来自starkeyi（L. starkeyi）的脂质的热分解。使用一步反应模型检查热分解。实施积分，微分和高级等转换方法来分析与转换有关的活化能。弗里德曼方法导致动力学参数的准确和可靠的估计。活化能强烈依赖于从123.5到246 kJ mol ^-1的转化率对于来自寻常梭状芽胞杆菌的脂质而言，其含量为80.3至299.9 kJ mol ^-1。对于来自starkeyi的脂质来说，其为80.3至299.9kJ mol ^-1 。广义主图方法证明，来自寻常棒棒糖的脂质的热分解通过三维扩散（D ₃ -Jander方程）进行。另外，动力学分析表明，由二维扩散模型控制的Valensi方程（D ₂）是最可能从斯塔氏乳脂中热分解脂质的机理。。通过动力学补偿图评估速率参数。通过TGA-MS研究了离子温度的演变，揭示了许多官能团在350–500°C的温度范围内演变为C1-C7脂肪烃，芳烃，醛，羧酸和呋喃衍生物。所有这些方面都有利于从微生物生物质到潜在的基于脂质的构建基块的脂质生物合成。