Effects of 2,5-dimethylfuran addition on morphology, nanostructure and oxidation reactivity of diesel exhaust particles
Effects of 2,5-dimethylfuran addition on morphology, nanostructure and oxidation reactivity of diesel exhaust particles
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添加2,5-二甲基呋喃对柴油机尾气颗粒形貌、纳米结构及氧化反应性的影响
DOI：
10.1016/j.fuel.2019.05.055
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发表时间：
2019-10
期刊：
影响因子：
7.4
通讯作者：
Funan Guo
中科院分区：
文献类型：
--
作者：
Xiaochen Wang;Ying Wang;Yuanqi Bai;Peng Wang;Dongxing Wang;Funan Guo
2,5 -二甲基呋喃（DMF）作为一种氧合添加剂，是一种有效降低柴油颗粒物（PM）排放的方法。然而，添加DMF对柴油机生成的PM氧化行为和纳米结构的影响尚不清楚。本研究探讨DMF添加对柴油机尾气颗粒形貌、纳米结构和氧化反应性的影响。实验在高压共轨柴油机上进行，以纯柴油DMF10（90%柴油和10% DMF，按体积计）和DMF20（80%柴油和20% DMF，按体积计）为燃料，在两种不同的发动机负载下，在相同的发动机转速（1800 r/min）下进行。采用透射电子显微镜（TEM）、拉曼光谱（RS）和热重分析（TGA）对发动机排气排气管中的颗粒进行了表征。结果表明，柴油机负荷和DMF掺混比对柴油机尾气颗粒的物理化学特性都有影响。在发动机负荷条件下，DMF20烟尘颗粒的氧化活性最强，其次是DMF10烟尘颗粒，其次是柴油烟尘颗粒。随着DMF混合比例的增加，原始颗粒直径和条纹长度减小，条纹扭曲度增大。与TEM的结果相似，混合燃料的D1-FWHM和ID1/ ig1越大，石墨结构越少。特别地，在本研究中，不同测试燃料的条纹分离距离和AD1/ ag1没有显示出统计学上的显著差异。更无序的结构解释了混合燃料产生的烟灰的更高反应性。与测试燃料无关，在较高的发动机负荷下，烟灰颗粒表现出更大的初级颗粒直径和更多的石墨结构，表明烟灰氧化反应性较低。
As an oxygenated additive, 2, 5-dimethylfuran (DMF) addition is a method to reduce effectively the diesel particulate matter (PM) emissions. However, the influences of DMF addition on oxidation behavior and nanostructure of PM produced from diesel engines are not well understood. This study explores the effects of DMF addition on morphology, nanostructure and oxidation reactivity of diesel exhaust particles. Experiments were conducted in a high pressure common-rail diesel engine fueled with pure diesel, DMF10 (90% diesel and 10% DMF, by vol.), DMF20 (80% diesel and 20% DMF, by vol.), under two different engine loads at the same engine speed (1800 r/min). Particulate samples were collected from engine exhaust tailpipe and further characterized by transmission electron microscope (TEM), Raman spectroscopy (RS) and thermogravimetric analysis (TGA). Results showed that the physicochemical features of diesel exhaust particles can be influenced by both engine load and DMF blending ratio. Under the given engine load condition, soot particle from DMF20 was more reactive to oxidation, followed by samples from DMF10 and diesel. With a rise of DMF blending ratio, both primary particle diameter and fringe length decreased while fringe tortuosity increased. Similar with the results obtained by TEM, the larger D1-FWHM and ID1/IGfor blended fuels demonstrated less graphitic structure. Specially, the fringe separation distance and AD1/AGdid not show statistically significant differences between various tested fuels in this study. The more disordered structures explained the higher reactivity of soot from blended fuels. Independently of tested fuel, soot particles exhibited larger primary particle diameter and more graphitic structure under higher engine loads, indicating a lower soot oxidation reactivity.
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DOI：
10.1021/ef401946t
发表时间：
2013-12
期刊：
Energy & Fuels
影响因子：
--
作者：
Xu Zhen;Li Xinling;Guan Chun;Huang Zhen
通讯作者：
Huang Zhen
柴油发动机中乙醇、正丁醇、2,5-二甲基呋喃和生物柴油烟灰形成的实验和模拟研究
影响因子：
5.3
作者：
Xinlei Liu;Hu Wang;Mingfa Yao
通讯作者：
Mingfa Yao
生物柴油/正丁醇、生物柴油/乙醇、生物柴油/2,5-二甲基呋喃在柴油机上燃烧及排放实验研究
影响因子：
9
作者：
Zheng Zunqing;Wang XiaoFeng;Zhong Xiaofan;Hu Bin;Liu Haifeng;Yao Mingfa
通讯作者：
Yao Mingfa
旋流燃烧对2,5-二甲基呋喃/正庚烷扩散火焰中烟尘特性的影响
影响因子：
6.4
作者：
Jia Penghui;Ying Yaoyao;Luo Minye;Jiang Bo;Liu Dong
通讯作者：
Liu Dong
影响因子：
6.4
作者：
B. Rohani;C. Bae
通讯作者：
B. Rohani;C. Bae