Biomass was used as additives in coal blending for making coke in terms of widening the alternative raw materials and reducing CO₂ emissions. To obtain the influences of biomass incorporation on the semicoke formation, the chemical structure transformation as well as the gas evolution during sawdust (SD)/coal blending (BC) co-coking were investigated using in-situ Fourier transform infrared spectroscopy coupled with mass spectrometry (In-situ FTIR-MS). Meanwhile, the role of biomass in the semicoke formation was also characterized by several analytical techniques. The transformation of the five main functional groups between SD and BC exhibited the largest difference, and the synergistic effect based on the chemical structure transformation was also proposed for the SD/BC blends co-coking. The synergistic effect based on the chemical structure transformation was divided into two stages during semicoke formation. One stage occurred at 100–280 °C that was assigned to the physical effect that inhibited the BC decomposition. Another stage happened at 280–500 °C that was mainly attributed to the hydrogen transfer that enhanced the aromatization of semi-coke. In addition, it was also noted that the thermoplastic properties decreased proportionately to the quantity of the SD, and the non-agglomeration between BC and SD was clearly observed by SEM.

从扩大替代原料和减少CO _2的角度来看，生物质被用作掺混煤的添加剂以制造焦炭排放。为了获得生物质掺入对半焦形成的影响，利用原位傅里叶变换红外光谱结合质谱法研究了木屑（SD）/煤共混（BC）共焦化过程中的化学结构转变以及气体逸出（原位FTIR-MS）。同时，还通过几种分析技术表征了生物质在半焦形成中的作用。SD和BC之间五个主要官能团的转化表现出最大的差异，并且还提出了基于化学结构转化的协同作用用于SD / BC共混焦化。在半焦形成过程中，基于化学结构转变的协同效应分为两个阶段。一个阶段发生在100–280°C，这是抑制BC分解的物理效应。另一个阶段发生在280–500°C，这主要归因于氢转移增强了半焦的芳构化。另外，还注意到，热塑性性质与SD的量成比例地降低，并且通过SEM清楚地观察到BC和SD之间的不凝聚。