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Formation of coke during the pyrolysis of bio-oil

机译：生物油热解过程中焦炭的形成

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摘要

Bio-oil from the pyrolysis of biomass can be upgraded into high quality liquid biofuels or utilised as a feedstock to boilers and gasifiers. The coke formation is a particularly serious problem for the upgrading of bio-oil as well as the direct utilisation of bio-oil. The effects of bio-oil chemical composition on the coke formation are keys to the understanding of the mechanism of coke formation. A bio-oil sample produced from the fast pyrolysis of mallee wood at 500℃ and the lignin-derived oligomers separated from the bio-oil were pyrolysed in a two-stage fluidised-bed/fixed-bed reactor at temperatures between 250 and 800℃. In addition to the quantification of coke yield, UV-fluorescence spectroscopy was used to trace the formation and evolution of aromatic ring systems during pyrolysis. Our results indicate that both water-soluble and water-insoluble bio-oil fractions can form coke even at very low temperatures. The interactions among the species derived from cellulose/hemicellulose and lignin, especially the interactions involving their oligomers, are important to the observed coke yield, especially at low temperatures.
机译：来自生物质热解的生物油可以升级为高质量的液体生物燃料，或用作锅炉和气化炉的原料。对于生物油的提质以及生物油的直接利用而言，焦炭的形成是一个特别严重的问题。生物油化学成分对焦炭形成的影响是理解焦炭形成机理的关键。木槌木材在500℃下快速热解产生的生物油样品以及从生物油中分离的木质素衍生的低聚物在两级流化床/固定床反应器中在250至800℃的温度下热解。除了量化焦炭产量外，还使用紫外荧光光谱法跟踪热解过程中芳环系统的形成和演化。我们的结果表明，即使在非常低的温度下，水溶性和非水溶性生物油馏分均会形成焦炭。衍生自纤维素/半纤维素和木质素的物质之间的相互作用，尤其是涉及其低聚物的相互作用，对于观察到的焦炭产量特别重要，尤其是在低温下。

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  • 来源
    《Fuel》 |2013年第6期|439-444|共6页
  • 作者

    Yi Wang; Daniel Mourant; Xun Hu; Shu Zhang; Caroline Lievens; Chun-Zhu Li;

  • 作者单位

    Fuels and Energy Technology Institute, Curtin University, GPO Box U1987, Perth, Western Australia 6845, Australia;

    Fuels and Energy Technology Institute, Curtin University, GPO Box U1987, Perth, Western Australia 6845, Australia;

    Fuels and Energy Technology Institute, Curtin University, GPO Box U1987, Perth, Western Australia 6845, Australia;

    Fuels and Energy Technology Institute, Curtin University, GPO Box U1987, Perth, Western Australia 6845, Australia;

    Fuels and Energy Technology Institute, Curtin University, GPO Box U1987, Perth, Western Australia 6845, Australia;

    Fuels and Energy Technology Institute, Curtin University, GPO Box U1987, Perth, Western Australia 6845, Australia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    bio-oil; coke; pyrolysis; aromatic; UV-fluorescence;

    机译：生物油可乐;热解芳香;紫外荧光;

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