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Transition between thermal and chemical effect of hydrogen assisted n-butane fuel catalytic ignition over Pt catalyst

机译：PT催化剂氢气辅助正丁烷燃料催化点火的热化学效应的转变

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摘要

Hydrogen assisted n-butane catalytic ignition on platinum in micro-combustion reactor are experimentally investigated over a wide equivalence ratio (0.4-1.5) of n-butane/air. In order to obtain the catalytic ignition temperature of n-butane, the temperature and concentration of the gas after catalytic reaction zone are measured by thermocouples and GC (gas chromatograph). Two ways when the ignition could not be achieved at room temperature 300 K, external heating and hydrogen addition are adopted to promote n-butane ignition. Results show that there are not only thermal effect of hydrogen, but also chemical effect which depends on the amount of hydrogen addition. There is a critical amount of hydrogen addition that below which is thermal effect and above which is chemical effect. The critical amount of hydrogen addition is 3.1% when the equivalence ratio of n-butane/air is 0.8 while 1.7% when the equivalence ratio is 0.4. The catalytic ignition temperature of chemical effect is much lower than that of thermal effect. Also the chemical effect would be achieved, as long as the amount of hydrogen addition has reached the transition amount. The results reveal that few hydrogen additions can realize catalytic ignition from room temperature without any ignition apparatus.
机译：在微燃烧反应器中铂的氢气辅助正丁烷催化点火在实验上以宽的正丁烷/空气的宽等当量比（0.4-1.5）。为了获得正丁烷的催化点火温度，通过热电偶和GC（气相色谱仪）测量催化反应区后气体的温度和浓度。在室温下不能在室温下达到点火300k时，采用外部加热和氢添加来促进正丁烷点火。结果表明，不仅存在氢气的热效应，还存在取决于氢添加量的化学效果。存在临界量的氢添加，下面是热效应，上述是化学效果。当丁烷/空气的等效比为0.8时，当等效率为0.4时，当丁烷/空气的等效比为0.4时，氢添加量为3.1％。化学效果的催化点火温度远低于热效应的效果。也可以实现化学效果，只要氢添加量达到过渡量即可。结果表明，在没有任何点火装置的情况下，少数氢添加可以实现催化点火。

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  • 来源
    《Fuel》 |2020年第15期|118053.1-118053.7|共7页
  • 作者

    Xiong Pengfei; Zhong Beijing; Zheng Dong; Yang Shunhua; Zhou Xin;

  • 作者单位

    China Aerodynam Res & Dev Ctr Mianyang 621000 Sichuan Peoples R China|Ludwig Maximilians Univ Munchen Dept Earth & Environm Sci D-80333 Munich Germany;

    Tsinghua Univ Sch Aerosp Engn Beijing 100084 Peoples R China;

    Southwest Jiaotong Univ Sch Mech Engn Chengdu 610031 Peoples R China;

    China Aerodynam Res & Dev Ctr Mianyang 621000 Sichuan Peoples R China;

    Ludwig Maximilians Univ Munchen Dept Earth & Environm Sci D-80333 Munich Germany;

  • 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

    Equivalence ratio; Hydrogen addition; Catalytic ignition temperature; Room temperature;

    机译：等效率;氢添加;催化点火温度;室温;

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