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  

Pyrolysis Characteristics and Properties of Thermal Conversion Products on Toluene Soluble Component from Medium Pitch

作　　者：朱亚明[1] 赵雪飞[1] 程俊霞[1] 刘巍[1] 吕君[1,2] 王莹 

机构地区：[1]辽宁科技大学,辽宁省先进煤焦化及煤资源高效利用工程研究中心,鞍山114051 [2]齐齐哈尔大学化学与化学工程学院,齐齐哈尔161006 [3]鞍山兴德材料科技股份有限公司,鞍山114048

出　　处：《材料导报》2017年第12期109-114,125,共7页Materials Reports

基　　金：国家自然科学基金(U1361126);教育部博士点基金(20132120110001)

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。Elemental composition, pyrolysis characteristics and microcrystalline structure of thermal conversion products on toluene soluble component from medium pitch were studied by elemental analysis, TG/DTG, polarizing microscope, X-ray diffrac- tion, Raman spectrum and curve-fitting methods. The Flynn-Wall-Ozawa method and Kissinger-Akahira-Sunose method were used to calculate the pyrolysis activation energy of toluene soluble component. The Satava-Sastak method was used to investigate the pyroly- sis kinetic parameters of toluene soluble component from medium pitch. Briefly, the activation energy （E） and pre-exponential factor （A） were E=88. 48 kJ/mol and lgA^---10. 22, the reaction series was 2, and the pyrolysis mechanism model of toluene soluble is ran- dom nucleation and subsequent growth. What＇s more, the optical microstructure of calcined thermal conversion product shows that the distribution of optical microstructure contents were mosaic structure （23. 74%）, crude fiber structure （14. 80%）, fine fiber structure （17. 88%）, and large structure （30. 45%）, respectively. Combined with XRD analysis and curve-fitting method, it was re- vealed that the content of ordered carbon crystallite （Ig） in the product was 41. 86%. Raman spectrum and curve-fitted method proves that the content of ideal graphite carbon crystallite was 11.59 %, the content of detect carbon crystallite was 79. 31%, and the ratio of amorphous carbon was 9. 10%. The thermal conversion product has a good graphitization ability.

关 键 词：中温沥青 甲苯可溶组分 热转化 微观结构 

分 类 号：TQ522.65[化学工程—煤化学工程]