Nanostructure and Oxidation Reactivity of Nascent Soot Particles in Ethylene/Pentanol Flames
Nanostructure and Oxidation Reactivity of Nascent Soot Particles in Ethylene/Pentanol Flames
复制标题
乙烯/戊醇火焰中初生烟灰颗粒的纳米结构和氧化反应性
DOI：
10.3390/en10010122
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发表时间：
2017-01
期刊：
影响因子：
3.2
通讯作者：
Wei Wang
中科院分区：
文献类型：
--
作者：
Dong Liu;Bo Jiang;Pengfei Wang;Wei Wang
作为碳氢燃料燃烧过程中的副产物，碳烟颗粒难以去除，对人体健康和环境造成极大的危害。因此，碳烟颗粒的形成和生长过程成为研究者的研究热点。研究了在乙烯逆扩散火焰中添加和不添加3种戊醇异构体（1-戊醇、3-甲基-1-丁醇和2-甲基-1-丁醇）对碳颗粒的纳米结构和氧化反应性的影响。采用高分辨透射电子显微镜（HRTEM）、X射线衍射仪（XRD）和热重分析仪（TGA）对初生碳烟颗粒的纳米结构和氧化特性进行了表征。结果表明，纯乙烯火焰中初生碳烟团结构疏松，而戊醇异构体的加入使碳烟团更加致密，并延缓了石墨结构的生长。戊醇异构体的添加也有助于在烟灰纳米结构中的微晶排列的更高的无序度。TGA实验结果表明，戊醇异构体的加入提高了碳烟颗粒的氧化反应活性，有助于降低碳烟颗粒的排放。
As byproducts of the combustion process of hydrocarbon fuels, soot particles are difficult to remove, and they can greatly harm human health and pollute the environment. Therefore, the formation and growth processes of the soot particles has become a study focus of researchers. In this paper, the nanostructure and oxidation reactivity of carbonaceous particles collected from ethylene inverse diffusion flames with or without the additions of three pentanol isomers (1-pentanol, 3-methyl-1-butanol, and 2-methyl-1-butanol) were investigated in detail. The nanostructure and oxidation characteristics of nascent soot particles were characterized using high resolution transmission electron microscopy (HRTEM), X-ray diffractometry (XRD) and thermogravimetric analysis (TGA). It was found that the nascent soot cluster of pure ethylene flame had a loose structure, while the additions of pentanol isomers made the soot agglomerates more compact and delayed the growth of graphitic structures. The pentanol isomer additions also contributed to a higher disorder of the crystallite arrangement in the soot nanostructure. According to the TGA experiments, the results showed that the addition of pentanol isomers enhanced the oxidation reactivity of soot particles, which could help to reduce soot particle emissions.
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