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Conversion of fuel nitrogen in a dual fluidized bed steam gasifier

机译：双流化床蒸汽气化炉中燃料氮的转化

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摘要

During gasification, fuel nitrogen is converted into gaseous species, such as NH_3, HCN and others. Several materials are gasified in the dual fluidized bed gasification pilot plant in order to assess the conversion of fuel nitrogen. The fuels tested in this study are different kinds of waste wood, bark and plastic residues. The nitrogen content of these materials ranges from 0.05 to 2.70 wt.-%. Detailed measurements of NH_3, N_2, HCN, NO and nitrogenous tars are carried out during the test runs. It is found that the vast majority of nitrogen is present in the form of NH_3. There is a linear relationship with high accuracy between fuel nitrogen and NH_3 in the producer gas. The nitrogen balance of the dual fluidized bed gasification system shows the distribution of nitrogen in the two coupled reactors of the gasification system. It is assessed that nitrogen conversion occurs almost exclusively in the gasification reactor. Only minor amounts of nitrogen are found in the char, which is transported to the combustion reactor and is converted to NO there. This result provides important information for the gas cleaning requirements when nitrogen-rich fuels are gasified.
机译：在气化过程中，燃料氮转化为气态物质，例如NH_3，HCN等。在双流化床气化中试装置中将几种材料气化，以评估燃料氮的转化率。在这项研究中测试的燃料是不同种类的废木材，树皮和塑料残渣。这些材料的氮含量为0.05至2.70重量％。在测试过程中对NH_3，N_2，HCN，NO和含氮焦油进行了详细的测量。发现绝大多数的氮以NH 3的形式存在。氮气中的燃料氮与NH_3之间存在高精度的线性关系。双流化床气化系统的氮平衡显示了气化系统的两​​个耦合反应器中氮的分布。据估计，氮转化几乎仅在气化反应器中发生。在焦炭中仅发现少量的氮，其被输送到燃烧反应器并在那里转化为NO。该结果为富氮燃料气化时的气体清洁要求提供了重要信息。

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  • 来源
    《Fuel》 |2013年第4期|793-801|共9页
  • 作者

    V. Wilk; H. Hofbauer;

  • 作者单位

    Bioenergy2020+ GmbH, Wienerstrasse 49, 7540 Cussing, Austria;

    Institute of Chemical Engineering, Vienna University of Technology, Getreidemarkt 9/166, 1060 Vienna, Austria;

  • 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

    nitrogen conversion; steam gasification; biomass; residues; dual fluidized bed;

    机译：氮转化蒸汽气化生物质残留物;双流化床;

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