Abstract The pyrolysis reactions of hardwood and softwood were investigated using evolved gas analysis and mass spectrometry (EGA-MS) and by treating the experimental data with isoconversional methods to obtain kinetic information. Mass spectrometric detection allowed the identification of the pyrolysis products to be performed and component-specific thermograms were obtained by the extraction of appropriate m/z values without the need of peak-fitting. Finally, isoconversional methods, both an integral and a differential method, were used on compound-specific thermograms to calculate apparent activation energies of the carbohydrate and lignin fractions separately. The results showed that the two isoconversional methods provide comparable results, and that there are significant differences between the activation energies of the holocellulose and lignin fractions. This work shows that EGA-MS can provide reliable kinetic data for multi-component samples without the need of chemical pre-treatments or signal deconvolution.

中文翻译：

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用于估算木材热解中特定组分动力学数据的演化气体分析-质谱和等转化方法

摘要 使用逸出气体分析和质谱 (EGA-MS) 并使用等转化方法处理实验数据以获得动力学信息，研究了硬木和软木的热解反应。质谱检测允许进行热解产物的鉴定，并且通过提取适当的 m/z 值获得特定组分的热分析图，无需进行峰拟合。最后，等转化方法，积分法和微分法，用于化合物特定的热谱图，分别计算碳水化合物和木质素部分的表观活化能。结果表明，两种等转化方法提供了可比较的结果，并且全纤维素和木质素部分的活化能之间存在显着差异。这项工作表明 EGA-MS 可以为多组分样品提供可靠的动力学数据，而无需化学预处理或信号解卷积。