热重红外光谱法考察木质生物质综纤维素热转化特性

热重红外光谱联用考察了木质生物质纤维素、半纤维素以及综纤维素的热转化特性，并与微晶纤维素和木聚糖等模型化合物进行了对比分析。应用三维扩散模型计算了活化能、指前因子等热转化动力学参数，拟合效果良好。通过分析气相产物三维IR图谱，在最大失重速率附近，观察到了H₂O，CO，CO₂，CH₄和含氧化合物的明显特征峰。讨论了主要气体产物可能的生成途径，发现其产量顺序为CO₂>H₂O>CO≈CH₄。综合分析得出，综纤维素的热转化过程是纤维素主导下、纤维素和半纤维素综合作用的结果。

TG-FTIR Study of the Thermal-Conversion Properties of Holo-Cellulose Derived from Woody Biomass

Thermal-conversion properties of cellulose, hemi-cellulose and holo-cellulose derived from woody biomass were studied using TG-FTIR, and also compared to those of avicel cellulose and xylan. 3-D diffusion model was applied to calculate the kinetic parameters of thermal-conversion reaction of biomass materials, such as the activation energy, pre-exponential factors, etc, which showed good regression results. With the analysis of three-dimensional IR spectra of gas products, featured peaks of H₂O, CO, CO₂, CH₄, and oxygenates were obviously observed where showing up with the maximum weight-loss rate in DTG curves. The possible forming routes of major gaseous products were analyzed and discussed. The order of releasing amounts for gaseous productions was approximately as CO₂>H₂O>CO≈CH₄. Based on the comprehensive understanding and comparative analysis of the whole results, it is concluded that the thermal conversion process of holo-cellulose was the result of interaction between cellulose and hemi-cellulose under the dominant role of cellulose.