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Physicochemical characterization of direct injection Engines's soot using TEM, EDS, X-ray diffraction and TGA
Journal of the Energy Institute ( IF 5.7 ) Pub Date : 2021-03-18 , DOI: 10.1016/j.joei.2021.03.009
Hay Mon Oo , Preechar Karin , Chinda Charoenphonphanich , Nuwong Chollacoop , Katsunori Hanamura

The physical characteristics and elemental composition of particulate matters (PMs) from gasoline direct injection spark ignition (GDI-SI) engines were successfully investigated using transmission electron microscopy - energy dispersive X-ray spectroscopy (TEM-EDS). Thermogravimetric analysis (TGA) was used to analyze the PMs oxidation. The morphology of agglomerated GDI-PMs is not significantly different from the diesel direct injection compression ignition (DDI-CI) engine's PMs. The spherical single primary nanoparticles of the engine's soot composed of curve line carbon crystallites. The average diameter size of the single primary nanoparticles of GDI, DDI, and carbon black are approximately 24 nm, 26 nm, and 31 nm, while the inter-planar spacing is about 0.364 nm, 0.358 nm, and 0.356 nm, respectively. The total fringe lengths of GDI, DDI, and carbon black are approximately 154 nm, 159 nm, and 163 nm measured from the areas of 10 nm × 10 nm inner core regions of primary nanoparticles, and are 180 nm, 195 nm, and 228 nm from the outer shell regions, respectively. The total fringe lengths of inner core are shorter than the outer shell. Besides, the engine's PMs contains both crystalline and amorphous carbon structure using XRD analysis. The GDI-PMs had the least crystalline structure compared to the DDI-PMs and carbon black due to the higher percentage of amorphous fraction. TGA analysis showed that the GDI-PMs oxidation was faster than the DDI-PMs and CB-N330 oxidation because of the primary particle size, the fringe length, and the crystal size which have an impact on oxidation kinetics of particulate matters.



中文翻译:

使用TEM,EDS,X射线衍射和TGA对直喷式发动机烟灰进行理化表征

使用透射电子显微镜-能量色散X射线光谱(TEM-EDS)成功研究了汽油直喷火花点火(GDI-SI)发动机的颗粒物(PMs)的物理特性和元素组成。热重分析(TGA)用于分析PM的氧化。团聚的GDI-PM的形态与柴油直喷压缩点火(DDI-CI)发动机的PM并无显着差异。发动机烟灰的球形单个初级纳米颗粒,由曲线碳微晶组成。GDI,DDI和炭黑的单个初级纳米粒子的平均直径大小约为24 nm,26 nm和31 nm,而面间距分别约为0.364 nm,0.358 nm和0.356 nm。GDI的总边缘长度,从一次纳米粒子的10 nm×10 nm内芯区域的面积测量,DDI和炭黑分别约为154 nm,159 nm和163 nm,并且距离外壳区域分别为180 nm,195 nm和228 nm,分别。内芯的总边缘长度短于外壳。此外,通过XRD分析,发动机的PMs既包含结晶碳结构又包含无定形碳结构。与DDI-PM和炭黑相比,GDI-PM具有最少的晶体结构,这是由于非晶部分所占的百分比较高。TGA分析表明,GDI-PMs的氧化速度比DDI-PMs和CB-N330的氧化速度快,这是因为主要粒径,条纹长度和晶体尺寸会影响颗粒物的氧化动力学。从初级纳米颗粒的10 nm×10 nm内核区域的面积测得的163 nm和163 nm,分别距外壳区域的180 nm,195 nm和228 nm。内芯的总边缘长度短于外壳。此外,通过XRD分析,发动机的PMs既包含结晶碳结构又包含无定形碳结构。与DDI-PM和炭黑相比,GDI-PM具有最少的晶体结构,这是由于非晶部分所占的百分比较高。TGA分析表明,GDI-PMs的氧化速度比DDI-PMs和CB-N330的氧化速度快,这是因为主要粒径,条纹长度和晶体尺寸会影响颗粒物的氧化动力学。从初级纳米颗粒的10 nm×10 nm内核区域的面积测得的163 nm和163 nm,分别距外壳区域的180 nm,195 nm和228 nm。内芯的总边缘长度短于外壳。此外,通过XRD分析,发动机的PMs既包含结晶碳结构又包含无定形碳结构。与DDI-PM和炭黑相比,GDI-PM具有最少的晶体结构,这是由于非晶部分所占的百分比较高。TGA分析表明,GDI-PMs的氧化速度比DDI-PMs和CB-N330的氧化速度快,这是因为主要粒径,条纹长度和晶体尺寸会影响颗粒物的氧化动力学。分别从外壳区域到228 nm和228 nm。内芯的总边缘长度短于外壳。此外,通过XRD分析,发动机的PMs既包含结晶碳结构又包含无定形碳结构。与DDI-PM和炭黑相比,GDI-PM具有最少的晶体结构,这是由于非晶部分所占的百分比较高。TGA分析表明,GDI-PMs的氧化速度比DDI-PMs和CB-N330的氧化速度快,这是因为主要粒径,条纹长度和晶体尺寸会影响颗粒物的氧化动力学。分别从外壳区域到228 nm和228 nm。内芯的总边缘长度短于外壳。此外,通过XRD分析,发动机的PMs既包含结晶碳结构又包含无定形碳结构。与DDI-PM和炭黑相比,GDI-PM具有最少的晶体结构,这是由于非晶部分所占的百分比较高。TGA分析表明,GDI-PMs的氧化速度比DDI-PMs和CB-N330的氧化速度快,这是因为主要粒径,条纹长度和晶体尺寸会影响颗粒物的氧化动力学。与DDI-PM和炭黑相比,GDI-PM具有最少的晶体结构,这是由于非晶部分所占的百分比较高。TGA分析表明,GDI-PMs的氧化速度比DDI-PMs和CB-N330的氧化速度快,这是因为主要粒径,条纹长度和晶体尺寸会影响颗粒物的氧化动力学。与DDI-PM和炭黑相比,GDI-PM具有最少的晶体结构,这是由于非晶部分所占的百分比较高。TGA分析表明,GDI-PMs的氧化速度比DDI-PMs和CB-N330的氧化速度快,这是因为主要粒径,条纹长度和晶体尺寸会影响颗粒物的氧化动力学。

更新日期:2021-03-23
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