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首页> 外文期刊>Environmental Science & Technology >Understanding the Difference in Oxidative Properties between Flame and Diesel Soot Nanoparticles:The Role of Metals
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Understanding the Difference in Oxidative Properties between Flame and Diesel Soot Nanoparticles:The Role of Metals

机译：了解火焰和柴油机烟灰纳米颗粒之间氧化性能的差异：金属的作用

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摘要

The purpose of this paper is to address the differences observed in the oxidative kinetics between flame and diesel derived soots.In particular,it has been observed that flame soot has a significantly higher activation energy for oxidation than does diesel soot.The hypothesis tested in this paper is that metals,possibly coming from lubricating oils,within diesel generated soot particles may be responsible for this effect.This is supported by the fact that addition of metal additives to diesel fuel is shown to have no effect on the activation energy of soot oxidation.The subject of this paper lies in testing the hypothesis by adding metal directly to a flame and extracting oxidation kinetics.Using a high temperature oxidation tandem differential mobility analyzer (HTO-TDMA) we extract particle size dependent kinetics for the oxidation of flame-derived soot doped with and without iron.We found that indeed addition of iron to a flame reduced the activation energy significantly from approx162+-3 kJ/mol to approx116+-3 kJ/mol,comparable with diesel engine generated soot with an activation energy approx110 kJ/mol.These results are consistent with the idea that small quantities of metals during diesel combustion may play an important role in soot abatement.
机译：本文的目的是解决在火焰和柴油衍生的烟灰之间的氧化动力学差异。特别是，已经观察到火焰烟灰具有比柴油烟灰明显更高的氧化活化能。论文认为，金属可能是来自润滑油的，可能是由柴油生成的烟灰颗粒中的这种现象所致。这证明了事实，即向柴油燃料中添加金属添加剂对烟灰氧化活化能没有影响本文的主题是通过将金属直接添加到火焰中并提取氧化动力学来检验该假设。使用高温氧化串联微分迁移率分析仪（HTO-TDMA），我们提取了与粒度相关的动力学，用于火焰衍生的氧化我们发现，在火焰中添加铁确实可以显着降低活化能， 162 + -3 kJ / mol至约116 + -3 kJ / mol，与柴油机产生的烟灰具有约110 kJ / mol的活化能相比，这些结果与柴油机燃烧过程中少量金属可能起重要作用的想法是一致的减少烟尘。

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  • 来源
    《Environmental Science & Technology》 |2005年第11期|p.4021-4026|共6页
  • 作者

    S.H.KIM; R.A.FLETCHER; M.R.ZACHARIAH;

  • 作者单位

    Nanoparticle-Based Manufacturing and Metrology Laboratory,Departments of Mechanical Engineering and Chemistry,University of Maryland,College Park,Maryland 20742,and National Institute of Standards and Technology,Gaithersburg,Maryland 20899;

    Nanoparticle-Based Manufacturing and Metrology Laboratory,Departments of Mechanical Engineering and Chemistry,University of Maryland,College Park,Maryland 20742,and National Institute of Standards and Technology,Gaithersburg,Maryland 20899;

    Nanoparticle-Based Manufacturing and Metrology Laboratory,Departments of Mechanical Engineering and Chemistry,University of Maryland,College Park,Maryland 20742,and National Institute of Standards and Technology,Gaithersburg,Maryland 20899;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境化学;
  • 关键词

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