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Influence of sulfur in fuel on the properties of diffusion flame soot

机译：燃料中硫对扩散火焰烟灰性能的影响

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摘要

Previous studies indicate that sulfur in fuel affects the hygroscopicity of soot. However, the issue of the effect of sulfur in fuel on soot properties is not fully understood. Here, the properties of soot prepared from fuel with a variable sulfur content were investigated under lean and rich flame conditions. Lean flame soot was influenced more by sulfur in fuel than rich flame soot. The majority of sulfur in fuel in lean flame was converted to gaseous SO2, while a small fraction appeared as sulfate and bisulfate (referred to as sulfate species) in soot. As the sulfur content in fuel increased, sulfate species in lean flame soot increased nonlinearly, while sulfate species on the surface of lean flame soot increased linearly. The hygroscopicity of lean flame soot from sulfur-containing fuel was enhanced mainly due to sulfate species. Meanwhile, more alkynes were formed in lean flame. The diameter of primary lean flame soot particles increased and accumulation mode particle number concentrations of lean flame soot from sulfur containing fuel increased as a result of more alkynes. Because the potential effects of soot particles on air pollution development greatly depend on the soot properties, which are related to both chemical aging and combustion conditions, this work will aid in understanding the impacts of soot on air quality and climate. (C) 2016 Elsevier Ltd. All rights reserved.
机译：先前的研究表明，燃料中的硫会影响烟灰的吸湿性。但是，对燃料中硫对烟灰性能影响的问题尚不完全清楚。在这里，研究了在稀薄火焰和浓火焰条件下，由硫含量可变的燃料制备的烟灰的性能。贫燃煤灰受燃料中硫的影响要大于富燃煤灰。稀薄火焰中燃料中的大部分硫转化为气态SO2，而烟灰中的一小部分以硫酸盐和硫酸氢盐（称为硫酸盐形式）出现。随着燃料中硫含量的增加，稀燃烟灰中的硫酸盐种类呈非线性增加，而稀燃烟灰表面上的硫酸盐种类呈线性增加。来自含硫燃料的稀薄火焰烟灰的吸湿性增加主要是由于硫酸盐类。同时，在稀薄的火焰中形成了更多的炔烃。由于更多的炔烃，主要的稀薄火焰烟灰颗粒的直径增加，并且来自含硫燃料的稀薄火焰烟灰的累积模式颗粒数浓度增加。由于烟尘颗粒对空气污染发展的潜在影响在很大程度上取决于与化学老化和燃烧条件有关的烟尘特性，因此这项工作将有助于理解烟尘对空气质量和气候的影响。 （C）2016 Elsevier Ltd.保留所有权利。

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  • 来源
    《Atmospheric environment》 |2016年第10期|383-392|共10页
  • 作者

    Zhao Yan; Ma Qingxin; Liu Yongchun; He Hong;

  • 作者单位

    Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100085, Peoples R China|Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China;

    Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100085, Peoples R China|Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China;

    Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100085, Peoples R China|Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China|Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Urban Atmospher Environm, Xiamen 361021, Peoples R China;

    Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100085, Peoples R China|Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China|Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Urban Atmospher Environm, Xiamen 361021, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Sulfur-containing fuel; Sulfate species; Alkynes; Primary particle size; Number concentration; Hygroscopicity;

    机译：含硫燃料硫酸盐种类炔烃初级粒径数浓度吸湿性;

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