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Pyrolysis of cellulose and lignin

机译:纤维素和木质素的热解

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摘要

X-ray and UV-induced photoelectron spectroscopy (XPS and UPS) and scanning electron microscopy (SEM) have been performed to characterise the pyrolysis of cellulose and lignin and their interaction with methanol. Clean highly oriented pyrolitic graphite (HOPG) was also analysed as a reference material. Asymmetric Cls core level fits and valence band XPS of the samples indicate a graphitic-like structure after the pyrolysis at 1200 ℃. Due to the low polar contents in pyrolysed cellulose and lignin, an interaction with methanol under high vacuum conditions could not be identified. From a technical viewpoint a temperature of 1200 ℃ is attainable without high costs. Therefore, the pyrolysis of wood-based polymers containing high amounts of cellulose and lignin are potential low-cost materials for various applications. If it is possible to generate graphite in complex structures made of wood-based polymers, a cheap and energy-efficient method will become available for producing bipolar plates for fuel cells. Technical problems like form instability and foaming are discussed as well as further development and possible modifications of the ground material to achieve optimal compositions.
机译:X射线和紫外线诱导的光电子能谱(XPS和UPS)和扫描电子显微镜(SEM)已被用来表征纤维素和木质素的热解以及它们与甲醇的相互作用。还分析了清洁的高取向热解石墨(HOPG)作为参考材料。样品在1200℃热解后具有不对称的Cls中心能级拟合和价带XPS表示石墨状结构。由于热解纤维素和木质素中的极性含量低,因此无法确定在高真空条件下与甲醇的相互作用。从技术角度来看,可以在不增加成本的情况下达到1200℃的温度。因此,含有大量纤维素和木质素的木质聚合物的热解是用于各种应用的潜在低成本材料。如果有可能在由木质聚合物制成的复杂结构中生成石墨,那么便宜而节能的方法将可用于生产燃料电池的双极板。讨论了诸如形状不稳定性和发泡之类的技术问题,以及对地面材料的进一步开发和可能的改进,以获得最佳的组成。

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  • 来源
    《Applied Surface Science》 |2009年第18期|8183-8189|共7页
  • 作者单位

    Institut fuer Physik and Institut fuer Mikro- und Nanotechnologien, Technische Universitaet Ilmenau. P.O. Box 100565, 98684 Ilmenau, Germany;

    Institut fuer Physik and Institut fuer Mikro- und Nanotechnologien, Technische Universitaet Ilmenau. P.O. Box 100565, 98684 Ilmenau, Germany;

    Institut fuer Physik and Institut fuer Mikro- und Nanotechnologien, Technische Universitaet Ilmenau. P.O. Box 100565, 98684 Ilmenau, Germany;

    Institut fuer Physik and Institut fuer Mikro- und Nanotechnologien, Technische Universitaet Ilmenau. P.O. Box 100565, 98684 Ilmenau, Germany;

    Institut fuer Physik and Institut fuer Mikro- und Nanotechnologien, Technische Universitaet Ilmenau. P.O. Box 100565, 98684 Ilmenau, Germany;

    Fraunhofer Institute for Chemical Technology, Joseph-von-Fraunhofer-Str. 7, 76327 Pfinztal (Berghausen), Germany;

    Fraunhofer Institute for Chemical Technology, Joseph-von-Fraunhofer-Str. 7, 76327 Pfinztal (Berghausen), Germany;

    Institut fuer Physik and Institut fuer Mikro- und Nanotechnologien, Technische Universitaet Ilmenau. P.O. Box 100565, 98684 Ilmenau, Germany;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    cellulose; lignin; pyrolysis; XPS; UPS; HOPG; valence band; methanol; VB;

    机译:纤维素木质素热解XPS;UPS;HOPG;价带;甲醇VB;

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