The influence of biomass macromolecular composition on its behaviour in torrefaction was statistically assessed through Principal Component Analysis (PCA), both in terms of solid conversion kinetics and volatile species released, in function of the operating conditions. The experimental data obtained in the torrefaction of 14 woody and agricultural biomass samples at lab-scale was analysed. Main biomass macromolecular composition on cellulose, hemicelluloses and lignin was shown to acceptably represent biomass diversity, which can be complemented by the extractives and ash content. Similitudes were found in deciduous and coniferous wood families, respectively, while agricultural and herbaceous crops were shown as more heterogeneous, both in terms of characterization and behaviour in torrefaction. Cellulose, hemicelluloses and lignin content strongly influenced solid and volatile species yields in torrefaction, while biomass family exhibited a lower impact. Ash content in potassium, phosphorous and silicon did not show any influence on the extent of solid degradation through torrefaction. A lower variability was found in solid degradation profiles from woods, while agricultural crop behaviour was more heterogeneous. Different volatile species were released from biomass samples from the same family. Furthermore, different production profiles were found for volatile species chemically close, except for deciduous wood. These results indicate that, when modelling biomass torrefaction, solid mass loss can be represented by an exemplar of deciduous and coniferous wood, while several species would be required for the agricultural family. The variability of the volatile species release would require the consideration of several volatile species and several biomass samples per family.

通过主成分分析（PCA），根据固体转化动力学和释放的挥发性物质，根据操作条件，通过统计学方法评估了生物质大分子组成对其在焙干中行为的影响。分析了在实验室规模下对14种木质和农业生物质样品进行焙烧得到的实验数据。纤维素，半纤维素和木质素上的主要生物质大分子组成已显示出可以接受地代表生物质多样性，其可以由提取物和灰分补充。分别在落叶和针叶木科中发现相似性，而从农作物的表征和行为上看，农作物和草本作物的异质性更高。纤维素 半纤维素和木质素含量强烈影响烘焙过程中固体和挥发性物质的产量，而生物量家族的影响较小。钾，磷和硅中的灰分含量对通过焙烧引起的固体降解程度没有任何影响。在来自木材的固体降解曲线中发现较低的变异性，而农作物的行为则更不均匀。从同一家族的生物质样品中释放出不同的挥发性物质。此外，除落叶木材外，还发现了化学上接近的挥发性物种的不同生产状况。这些结果表明，当对生物质干烧进行建模时，可以用落叶和针叶木材为代表的固体质量损失，而农业家庭则需要几种树种。