Torrefaction is a routine and effective method for recovering energy from biomass. In this study, autohydrolysis pretreatment was proposed to upgrade the torrefaction process of moso bamboo, and their relationship was evaluated. Results showed that about 80.24 % of bamboo hemicellulose were dissolved during autohydrolysis pretreatment. Compared with main chain, arabinan side chain of hemicellulose was much easier to be degraded, and more uniform hemicellulose could be obtained at 160 °C. The O/C values of autohydrolysis solid residues and the mass yield of torrefied bamboo decreased gradually with the enhancement of reaction severity (autohydrolysis and/or torrefaction), while the HHV values increased. The higher torrefaction temperature or autohydrolysis pretreatment severity was, the better thermostability of torrefied bamboo could be observed. 2D-HSQC of milled wood lignin revealed that autohydrolysis pretreatment can effectively accelerate the degradation of β-O-4 linkage in lignin and increase G-type lignin content during torrefaction process. Compared with direct torrefaction, prehydrolysis can greatly facilitate the torrefaction process and enhance the quality of final products.

烘焙是从生物质中回收能量的常规且有效的方法。本研究提出了自水解预处理技术，以提高毛竹的烘烤过程，并对其关系进行了评价。结果表明，在自水解预处理过程中，约有80.24％的竹半纤维素溶解。与主链相比，半纤维素的阿拉伯聚糖侧链更容易降解，在160°C时可以获得更均匀的半纤维素。随着水解反应强度（自水解和/或焙干）的增加，自水解固体残留物的O / C值和烘焙竹的质量产率逐渐降低，而HHV值则升高。焙烧温度或自水解预处理的严重程度越高，可以观察到焙烧过的竹子的热稳定性越好。木质素中的O -4键和在烘焙过程中增加G型木质素含量。与直接烘焙相比，预水解可以大大促进烘焙过程并提高最终产品的质量。