中温沥青中甲苯可溶组分的热解特性及热转化产物的性质

发布时间：2019-01-04 17:23

【摘要】：以中温煤沥青的甲苯可溶组分为原料,进行元素分析和TG/DTG分析,并且利用偏光显微镜、X射线单晶衍射仪、拉曼光谱以及相应的分峰拟合等数学方法对热转化的产物进行研究。以实验获得的数据为基础,采用Flynn-Wall-Ozawa法和Kissinger-Akahira-Sunose法计算得到反应活化能,采用Satava-Sastak法求解热解反应动力学参数。实验结果表明,中温沥青中甲苯可溶组分的热解反应活化能为E=88.48kJ/mol,指前因子lgA=10.22,反应级数为2级,热解反应机理适合随机成核及其随后的增长模型。1 000℃焙烧后的炭化产物的光学显微组分含量为:镶嵌型23.74%,粗纤维型14.80%,细纤维17.88%,大片结构30.45%。由XRD研究结果可知,趋于规整结构的碳微晶含量为41.86%。Raman光谱分析研究结果表明,石墨结构的碳微晶含量为11.59%,缺陷石墨碳含量为79.31%,无定形碳含量为9.10%。热转化产物具有很好的可石墨化性。
[Abstract]:Using toluene soluble component of medium-temperature coal pitch as raw material, elemental analysis and TG/DTG analysis were carried out, and polarizing microscope and X-ray single crystal diffractometer were used. Raman spectra and corresponding peak fitting methods were used to study the thermal conversion products. Based on the experimental data, the reaction activation energy was calculated by Flynn-Wall-Ozawa method and Kissinger-Akahira-Sunose method, and the kinetic parameters of pyrolysis reaction were calculated by Satava-Sastak method. The experimental results show that the activation energy of pyrolysis of toluene soluble component in medium-temperature asphalt is 88.48kJ / mol, and the lgA=10.22, reaction order of pre-exponential factor is 2. The mechanism of pyrolysis is suitable for random nucleation and subsequent growth models. The content of optical macerals of carbonized products calcined at 1000 鈩，

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