中文摘要：

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。

英文摘要：

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 CO2H2OCO≈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.