Curtin Centre for Advanced Energy Science and Engineering, Curtin University of Technology, 1 Turner Avenue, Technology Park, WA 6102, Australia.
Bioresour Technol. 2010 Oct;101(20):7935-43. doi: 10.1016/j.biortech.2010.05.048. Epub 2010 Jun 14.
The structural features and combustion reactivity of chars prepared from the fast pyrolysis of mallee wood were investigated using Raman spectroscopy and thermogravimetric analysis. The Raman spectra were curve-fitted by using 10 Gaussian bands, representing different structural features of chars. The total Raman peak areas between 800 and 1800 cm⁻¹ and combustion reactivity of chars were seen to decrease with increasing pyrolysis temperature. The curve-fitting Raman spectra represented that the formation of amorphous carbon structure with smaller polyaromatic rings are dominant in chars from bigger particles of biomass and at lower temperature. The condensed and larger aromatic ring systems are preferentially formed in chars from smaller particles and at higher temperature. The former structure is higher reactive than the latter one, which is reflected in the char reactivity. The retention of inherent catalytic species (AAEM) also plays an important role in char reactivity. However, our results suggested that the structure of char played a more dominant role than the catalytic effects of AAEM species in the char intrinsic combustion reactivity.
利用拉曼光谱和热重分析研究了从马利木快速热解制备的炭的结构特征和燃烧反应性。用 10 个高斯带对拉曼光谱进行曲线拟合，代表了炭的不同结构特征。在 800 到 1800 厘米⁻¹ 之间的总拉曼峰面积和炭的燃烧反应性随着热解温度的升高而降低。曲线拟合的拉曼光谱表明，在较大生物质颗粒和较低温度下形成的炭中，无定形碳结构和较小的多环芳烃结构占主导地位。在较小颗粒和较高温度下形成的炭中，优先形成凝聚的较大芳环体系。前者的结构比后者更具反应性，这反映在炭的反应性上。固有催化物质（AAEM）的保留也在炭的反应性中起着重要作用。然而，我们的结果表明，在炭的固有燃烧反应性中，炭的结构比 AAEM 物质的催化作用起着更主导的作用。
