蒽油基软沥青液相炭化过程中结构变化研究  

Changes in structures of anthracene oil-based soft pitch during liquid-phase carbonization process

作　　者：刘惠美 徐允良 朱亚明[1,2] 王莹 高丽娟[1] 赵雪飞[1,2] Liu Hui-mei;Xu Yun-liang;Zhu Ya-ming;Wang Ying;Gao Li-juan;Zhao Xue-fei(Engineering Research Center of Advanced Coal Coking and Efficient Use of Coal Resources,University of Science and Technology Liaoning,Institute of Chemical Engineering,Liaoning Anshan 114051,China;Key Laboratory of Chemical Metallurgy Liaoning provinceJ,University of Science and Technology Liaoning,Liaoning Anshan 114051,China;Anshan Xingde Engineering Technology Co.Ltd.,Liaoning Taian,114000,China)

机构地区：[1]辽宁科技大学化工学院辽宁省先进煤焦化及煤资源高效利用工程研究中心,辽宁鞍山114051 [2]辽宁科技大学辽宁省化学冶金重点实验室,辽宁鞍山114051 [3]鞍山兴德工程技术有限公司,辽宁台安114000

出　　处：《炭素技术》2020年第4期41-45,共5页Carbon Techniques

基　　金：国家自然科学基金(U1361126);辽宁省自然科学基金(20180551218);辽宁省教育厅青年基金(2017LNQN04);辽宁科技大学优秀人才培养项目(2018RC07);辽宁科技大学青年基金(2017QN06)。

摘　　要：为了获得蒽油基软沥青在热转化过程中的结构(分子结构、偏光显微结构)变化规律,采用元素分析仪、偏光显微镜、FTIR结合分峰拟合的方法对蒽油基软沥青的热转化行为进行了研究。结果表明:随着热转化温度的升高,蒽油基软沥青的芳香性指数(Iar)和支链化指数(CH3/CH2)逐渐升高;C—C含量随着热转化温度升高而增加,C—O和C—O含量则随着热转化温度升高呈现先缓慢减少,后急剧减少的趋势。当热转化温度低于430℃时,蒽油基软沥青的分子结构参数(Iar、CH3/CH2、C—C、C—O、C—O)变化幅度较少;超过430℃后,分子结构参数则急剧变化。从偏光显微结构可知,蒽油基软沥青在热转化温度为440℃时有中间相炭微球产生,随着热转化温度升高,中间相炭微球逐渐长大、融并、形成中间相。Ultimate analyzer,polarizing microscope,FTIR spectrum and curve-fitting methods have been used to investigate the structure changes of anthracene oil-based soft pitch during liquid-phase carbonization.The results have shown that both the aromatic index(Iar)and branched index(CH3/CH2)of anthracene oil-based soft pitch,as well as the contents of C—C are also increased with the increasing of thermal conversion temperature.What’s more,the contents of C—O and C—O have shown a slowly decrease and then decrease sharply with the increasing of thermal conversion temperature.The molecular structure parameters(Iar,CH3/CH2,C—C,C—O,and C—O)of anthracene oil-based soft pith have hardly changed when the thermal conversion temperature is lower than 430℃.However,the molecular structure parameters have changed obviously when the thermal conversion temperature exceeds 440℃.It can be seen from the optical microstructure that,mesocarbon microbeads appear in anthracene oil-based soft pitch at the thermal conversion temperature of 440℃.Since then,mesocarbon microbeads are gradually grown,fused and formed mesophase with the increase of heat conversion temperature.

关 键 词：蒽油基软沥青 热转化 结构变化 

分 类 号：TQ522.63[化学工程—煤化学工程]