中温沥青族组成分析及其对中间相沥青结构的影响  

Analysis of medium temperature coal tar pitch group composition and its effect on the structure of mesophase pitch

作　　者：丁卜席 钟梅[1] 马凤云[1] DING Bu-xi;ZHONG Mei;MA Feng-yun(School of Chemical Engineering and Technology,Xinjiang University,State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources,Key Laboratory of Coal Clean Conversion&Chemical Engineering Process(Xinjiang Uygur Autonomous Region),Urumqi 830046)

机构地区：[1]新疆大学化工学院省部共建碳基能源资源化学与利用国家重点实验室,新疆煤炭洁净转化与化工过程重点实验室,新疆乌鲁木齐830046

出　　处：《燃料化学学报》2022年第7期920-926,共7页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(21766035);新疆维吾尔自治区杰出青年基金(2020Q001);上海合作组织科技伙伴计划及国际科技合作计划(2020E01018);新疆维吾尔自治区重点实验室开放项目(2018D04008)资助。

摘　　要：以甲苯-吡啶、正庚烷-四氢呋喃为溶剂,采用索氏抽提分离中温沥青(ZCTP)的族组分并解析其组成与结构。结果表明,与ZCTP相比,甲苯不溶-吡啶可溶物(TI-PS)和正庚烷不溶-四氢呋喃可溶物(HI-THFS)的热稳定性更高,残炭率增至56.95%和47.63%,失重量分别减小41.51%和28.85%;此外,TI-PS和HI-THFS的C=C含量分别比ZCTP高6.69%和3.26%,为75.57%和73.14%,吡啶氮含量分别提升约16和8个百分点。以TI-PS和HI-THFS为原料分别制得中间相沥青M-TI-PS和M-HI-THFS。其中,M-HI-THFS以中小区域型为主,并伴有部分细镶嵌结构,光学各向异性含量较低;M-TIPS光学各向异性含量约为80%,且形成了广域型光学织构;然而ZCTP难以形成稳定的区域型光学织构,只能形成马赛克型光学织构。Medium temperature coal tar pitch(ZCTP)was separated by Soxhlet extraction using toluene-pyridine and n-heptane-tetrahydrofuran as solvents to obtain the group components.Then,their composition and structure were analyzed.The results show that,in comparison with ZCTP,toluene-insoluble pyridine soluble(TI-PS)and nheptane-insoluble tetrahydrofuran soluble(HI-THFS)are more thermally stable,exhibiting a decrease weight loss of 41.51%and 28.85%and an increase residual carbon rate of 56.95%and 47.63%,respectively.In addition,the C=C contents of TI-PS and HI-THFS are 6.69%and 3.26%higher than that of ZTCP,reaching 75.57%and 73.14%,and the pyridine nitrogen contents of TI-PS and HI-THFS increase about 16 and 8 percentage points.Both TI-PS and HI-THFS were used to prepare mesophase pitch.It is found that M-HI-THFS is mainly consisted of small and medium area type with some fine mosaic structure and low optical anisotropy content.While M-TI-PS has about 80%optical anisotropy content and displays a wide range of optical weave.However,it is difficult for ZCTP to form a stable regional optical fabric structure,just exhibiting a mosaic optical fabric.

关 键 词：中温沥青 索氏抽提 族组分 共炭化 中间相沥青 

分 类 号：TQ533[化学工程—煤化学工程] TQ536