Impact of exhaust gas recirculation (EGR) on the oxidative reactivity of diesel engine soot
Impact of exhaust gas recirculation (EGR) on the oxidative reactivity of diesel engine soot
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DOI：
10.1016/j.combustflame.2008.06.002
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发表时间：
2008-12-01
影响因子：
4.4
通讯作者：
Boehman, Andre L.
中科院分区：
文献类型：
--
作者：
Al-Qurashi, Khalid;Boehman, Andre L.
本文扩展了对影响柴油机烟灰纳米结构和氧化反应性的因素的考虑，将废气再循环（EGR）的影响包括在内。过去的工作表明，烟灰衍生的前含氧燃料（例如生物柴油）带有一些表面氧官能团，因此具有比烟灰前传统柴油燃料更高的反应性。适合这项工作，结果表明，EGR 对油烟灰的物理性质产生强烈影响，从而导致氧化速率增强。 HRTEM 图像显示在 0% 和 20% EGR 下产生的烟灰的燃烧模式之间存在显着差异。 0% EGR 下产生的烟灰严格遵循所有外部燃烧模式，没有内部燃烧的迹象。相比之下，20% EGR 下产生的烟灰表现出双重燃烧模式：缓慢的外部燃烧和快速的内部燃烧。结果清楚地表明，通过 EGR 控制烟灰的物理特性可以实现高反应性烟灰调用。 (C) 2008 年燃烧研究所。由爱思唯尔公司出版。保留所有权利。
This paper expands the consideration of the factors affecting the nanostructure and oxidative reactivity of diesel soot to include the impact of exhaust gas recirculation (EGR). Past work showed that soot derived front oxygenated fuels Such as biodiesel carries some surface oxygen functionality and thereby possesses higher reactivity than soot front conventional diesel fuel. fit this work, results show that EGR exerts a strong influence oil the physical properties of the soot which leads to enhanced oxidation rate. HRTEM images showed a dramatic difference between the burning modes of the soot generated Under 0 and 20% EGR. The soot produced under 0% EGR strictly followed all external burning mode with no evidence of internal burning. In contrast, soot generated Under 20% EGR exhibited dual burning Modes: slow external burning and rapid internal burning. The results demonstrate clearly that highly reactive soot call be achieved by Manipulating the physical properties of the soot via EGR. (C) 2008 The Combustion Institute. Published by Elsevier Inc. All rights reserved.