The role of fuel-borne catalyst in diesel particulate oxidation behavior
The role of fuel-borne catalyst in diesel particulate oxidation behavior
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DOI：
10.1016/j.combustflame.2006.03.012
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发表时间：
2006-07
影响因子：
4.4
通讯作者：
Juhun Song;Jinguo Wang;A. Boehman
中科院分区：
文献类型：
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作者：
Juhun Song;Jinguo Wang;A. Boehman
本研究针对柴油机微粒在两种不同负荷条件下，有和没有纳入金属氧化物的铁基燃料载催化剂（FBC）的氧化行为的差异。高分辨率透射电子显微镜成像，连同电子能量损失谱被用来评估的微观结构和发生在烟尘形成过程中的金属氧化物的化学状态，并了解这些属性可以影响随后的烟尘氧化的方式。这里的结果表明，在低负荷下的FBC-doped烟灰比在高负荷下的FBC-doped烟灰更可能在烟灰表面的外周上具有金属氧化物的富集。从元素微量分析，观察到较高的金属氧化物与碳的比例与FBC-doped烟灰在低负荷。氧化结果表明，较高的氧化反应性与金属氧化物在烟灰表面上更好的铺展有关。
This study addresses the difference in oxidation behavior of diesel particulates at two different load conditions with and without incorporated metal oxides from an iron-based fuel-borne catalyst (FBC). High-resolution transmission electron microscopy imaging, together with electron energy loss spectroscopy is used to evaluate the microstructure and chemical state of the metal oxides that occur during soot formation and to understand the manner in which these properties can affect subsequent soot oxidation. The results here show that FBC-doped soot at low load is more likely to have enrichment of metal oxide on the outer periphery of the soot surface than FBC-doped soot at high load. From element microanalysis, a higher ratio of metal oxide to carbon was observed with FBC-doped soot at low load. Oxidation results indicate that the higher oxidative reactivity is associated with better spreading of the metal oxide on the soot surface.