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Oxidative pyrolysis of wood chips and of wood pellets in a downdraft continuous fixed bed reactor

机译：下沉式连续固定床反应器中木片和木片的氧化热解

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摘要

In air staged gasification and advanced carbonization processes, oxidative pyrolysis occurs in downdraft continuous fixed bed reactors. An oxidation zone separates the virgin fuel from the resulting char and propagates upward. Here, the oxidation zone was stabilized at a fixed elevation in a 20 cm I.D. fixed bed reactor using wood chips or wood pellets. In controlled continuous operating mode, we investigated the impact of air flux and bed bulk density on the behavior of the oxidation zone in terms of wood consumption, and yields of chit., gas and tars. An air:wood mass ratio of 0.7 was measured and in our operating conditions, and was not sensitive to air mass flux and bed density. With oxidative pyrolysis, yields of organic condensates were lower than with allothermal pyrolysis, whereas the production of pyrolysis water and permanent gases increased. Finally, the oxidation zone was shown to be flat and horizontal in a wood pellet bed but inclined in a wood chip bed. (C) 2017 Elsevier Ltd. All rights reserved.
机译：在空气分级气化和高级碳化过程中，氧化热解发生在向下气流连续固定床反应器中。氧化区将原始燃料与生成的炭分离并向上传播。在此，氧化区稳定在20cm I.D.的固定高度。使用木屑或木屑的固定床反应器。在受控的连续运行模式下，我们从木材消耗量，chi，气和焦油的收率方面研究了空气流量和床堆积密度对氧化区行为的影响。在我们的工作条件下，空气与木材的质量比为0.7，对空气流量和床密度不敏感。在氧化热解下，有机冷凝物的产率低于在热解热解下，而热解水和永久性气体的产量增加。最终，氧化区域显示在木质颗粒床中是平坦且水平的，但在木质碎片床中是倾斜的。 （C）2017 Elsevier Ltd.保留所有权利。

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  • 来源
    《Fuel》 |2017年第may15期|408-418|共11页
  • 作者

    Daouk Elias; Van de Steene Laurent; Paviet Frederic; Martin Eric; Valette Jeremy; Salvador Sylvain;

  • 作者单位

    CIRAD UR BioWooEB, 73 Ave Jean Francois Breton, F-34398 Montpellier 5, France|CNRS UMR 5203, RAPSODEE, Mines Albi, Campus Jarlard, F-8101309 Albi Cedex 09, France|Univ Nantes, UMR 6144 CNRS, GEPEA, Ecole Mines Nantes, 4 rue Alfred Kastler,BP 20722, F-44307 Nantes 3, France;

    CIRAD UR BioWooEB, 73 Ave Jean Francois Breton, F-34398 Montpellier 5, France;

    Univ Nantes, UMR 6144 CNRS, GEPEA, Ecole Mines Nantes, 4 rue Alfred Kastler,BP 20722, F-44307 Nantes 3, France;

    CIRAD UR BioWooEB, 73 Ave Jean Francois Breton, F-34398 Montpellier 5, France;

    CIRAD UR BioWooEB, 73 Ave Jean Francois Breton, F-34398 Montpellier 5, France;

    CNRS UMR 5203, RAPSODEE, Mines Albi, Campus Jarlard, F-8101309 Albi Cedex 09, France;

  • 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

    Oxidative pyrolysis; Fixed-bed; Biomass; Smoldering; Yields of products;

    机译：氧化热解;固定床;生物质;阴燃;产品种类;

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