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Ignition of hydrothermal flames

机译：点火水热火焰

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摘要

Supercritical water oxidation is one of the most promising technologies for complete oxidation of complex organic compounds. Flames in supercritical water, often referred to as hydrothermal flames, improve the oxidation rates of reactants in an organic waste stream. The ignition and control of flames in supercritical water could potentially be used to reduce the reaction time (from seconds to milliseconds) and enhance the thermochemical decomposition rates of recalcitrant molecules without the release of any harmful intermediates. This provides a platform to design compact reactors for processing complex organic waste followed by their conversion to valuable compounds. This paper reviews some notable work focused on the ignition and qualitative observations of hydrothermal flames as an environmentally friendly technology. More specifically, the review highlights the classification and characterization of hydrothermal flames with several demonstrations of laboratory scale (e.g., visual flame cell) and pilot scale (e.g., transpiring wall reactor) reactor configurations. The process parameters such as feed concentration, reaction temperature, oxidant temperature, oxidant flow rate, and transpiration flow properties (in the case of transpiring reactors) are comprehensively discussed for their influence on the ignition and stability of hydrothermal flames, and total organic carbon removal. In addition, the impact of these parameters on the performance of various flame reactors is presented. Finally, the paper also outlines some wide-ranging applications and challenges concerning the industrial utilization of hydrothermal flames.
机译：超临界水氧化是复杂有机化合物完全氧化最有前途的技术之一。超临界水中的火焰，通常被称为水热火焰，改善了有机废物流中反应物的氧化率。超临界水中的火焰的点火和控制可能用于减少反应时间（从几秒到毫秒），并增强醋培分子的热化学分解率，而不会释放任何有害的中间体。这提供了设计紧凑型反应器的平台，用于加工复杂的有机废物，然后转化为有价值的化合物。本文评论了一些显着的工作，专注于热热火焰点火和定性观察作为环保技术。更具体地，审查突出了水热火焰的分类和表征，具有几个实验室规模（例如，视觉火焰细胞）和飞行秤（例如，转发壁反应器）反应器配置的若干演示。诸如进料浓度，反应温度，氧化剂温度，氧化剂流速和蒸腾流动性（在转档反应器的情况下）的过程参数被全面地讨论了对热热火焰的点火和稳定性的影响，以及总有机碳去除。此外，提出了这些参数对各种火焰反应器性能的影响。最后，本文还概述了有关水热火焰的工业利用的一些广泛的应用和挑战。

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  • 来源
    《RSC Advances》 |2015年第46期|共19页
  • 作者

    Reddy Sivamohan N.; Nanda Sonil; Hegde Uday G.; Hicks Michael C.; Kozinski Janusz A.;

  • 作者单位

    Indian Inst Technol Roorkee Dept Chem Engn Roorkee Uttarakhand India;

    York Univ Lassonde Sch Engn Dept Earth &

    Space Sci &

    Engn Toronto ON M3J 2R7 Canada;

    Case Western Reserve Univ Dept Mech &

    Aerosp Engn Cleveland OH 44106 USA;

    NASA Glenn Res Ctr Cleveland OH USA;

    York Univ Lassonde Sch Engn Dept Earth &

    Space Sci &

    Engn Toronto ON M3J 2R7 Canada;

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  • 正文语种 eng
  • 中图分类 化学;
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