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Average structural analysis of the extractable material of young soot gathered in an ethylene inverse diffusion flame

机译:乙烯逆扩散火焰中聚集的年轻烟灰可萃取物的平均结构分析

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摘要

Conventional analytical methods such as ~1H NMR, vapor pressure osmometry (VPO) and elemental analysis were used to characterize the soot precursor material represented by the chloroform extractable fractions of the young soot gathered at different heights of an ethylene inverse diffusion flame in terms of average structural parameters. The results indicate that the soot soluble fraction obtained at a 6 mm height has a relatively large molecular weight and has long aliphatic chains which later disappear with an increase in height above the burner base, especially in the region where the temperature is high (1200 K). This behavior is also accompanied by an increase in the aromaticity (f_a) of the samples.
机译:使用常规的分析方法(例如〜1H NMR,蒸气压渗透压法(VPO)和元素分析)来表征烟灰前驱物材料,该烟灰前体材料的特征在于,烟灰前体材料的氯仿可提取馏分聚集在乙烯逆扩散火焰的不同高度,以平均值表示。结构参数。结果表明,在6 mm高处获得的烟灰可溶级分具有相对较大的分子量,并具有较长的脂肪链,该脂肪链随后会随着燃烧器底部上方的高度增加而消失,特别是在温度较高(1200 K )。这种行为还伴随着样品的芳香度(f_a)的增加。

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