萃取剂组成和结构对煤直接液化油渣萃取行为的影响  

Influences of the composition and structure of extractants on their extraction behavior for coal direct liquefaction residue

作　　者：黄剑波 刘洋[1,2] 闫伦靖[1,2] 廖俊杰 常丽萍[1,2] 王建成[1,2] HUANG Jian-bo;LIU Yang;YAN Lun-jing;LIAO Jun-jie;CHANG Li-ping;WANG Jian-cheng(State Key Laboratory of Clean and Efficient Coal Utilization,Taiyuan University of Technology,Taiyuan 030024,China;Key Laboratory of Coal Science and Technology,Ministry of Education,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学省部共建煤基能源清洁高效利用国家重点实验室,山西太原030024 [2]太原理工大学煤科学与技术教育部重点实验室,山西太原030024

出　　处：《燃料化学学报》2021年第8期1077-1085,共9页Journal of Fuel Chemistry and Technology

基　　金：国家能源集团2030先导项目(GJNY2030XDXM-19-17);山西省面上自然基金(201901D111119);山西省高等学校科技创新项目资助。

摘　　要：煤直接液化过程会产生约占投煤量30%的煤液化油渣,利用萃取手段可将其中的多环芳烃类物质提取出来,制备高价值的炭材料。本文总结了萃取剂的组成结构对煤液化油渣萃取率及萃取产物性质的影响。含有芳环结构或氮氧杂环的萃取剂萃取率可达50%以上。烷烃类有机萃取剂的萃取物主要包含2-4环缩合芳香结构,拥有较低的分子量和杂原子含量。含杂原子有机萃取剂的萃取物主要包含4-7环缩合芳香结构,其分子量大且富含氮、氧、硫等杂原子,C/H原子比较高。吡啶基离子液体萃取物的C/H原子比和芳香度较高;有机酸根基离子液体萃取物的灰分含量较低。使用煤液化油或煤焦油馏分油为萃取剂时,萃取率可达60%,具有工业化应用的前景。During the direct coal liquefaction process,coal direct liquefaction residue(CDLR),which accounts for about 30%of the coal input,will be produced and the polycyclic aromatic hydrocarbons can be extracted from it by extraction to prepare high-value carbon materials.The influences of composition and structure of extractants on the extraction rate and properties of extracted products were systematically summarized.The extraction rate of the extractants which have aromatic structure or nitrogen and oxygen atom can reach more than 50%.The extracts in alkane organic solvents mainly contain condensed aromatic structure with 2-4 benzene rings and have a lower molecular weight and heteroatom content.The extracts in heteroatoms containing solvents are mainly composed of condensed aromatic structure with 4-7 benzene rings and have a larger molecular weight.And they are rich in heteroatoms,such as nitrogen,oxygen and sulfur,and have a high atomic ratio of C/H.The extracts of pyridinium-based ionic liquids have higher atomic ratio of C/H and aromaticity.And the ash content of the extracts of ionic liquids containing organic acid ions is close to 0.When coal liquefaction oil or coal tar distillate are used as extractants,the extraction rate can reach 60%,which are suggested for industrial applications of CDLR extraction.

关 键 词：煤直接液化油渣 萃取剂 萃取行为 溶剂复配 离子液体 

分 类 号：TQ536.4[化学工程—煤化学工程]