煤直接液化沥青与废机油共炭化制备煤基针状焦及其结构演变研究OA
Preparation and structure evolution of coal-based needle coke by co-carbonization of coal direct liquefaction pitch and waste engine oil
针状焦作为一种高性能的人造炭材料,其原料的组分调控对材料的结构性能具有决定性影响.本研究以煤直接液化沥青(CDLP)和废机油(WEO)为原料,通过组分优化和共炭化工艺,制备了一系列针状焦.采用红外光谱(FT-IR)、偏光显微镜(PLM)、扫描电子显微镜(SEM)、X射线衍射(XRD)、拉曼光谱(Raman)、热重分析(TGA)、显微强度(MS)和粉末电阻率(PR)等多种表征手段,研究了针状焦的微观结构和性能特征,并探讨了 CDLP和WEO的共炭化机理.实验结果表明,WEO的加入显著降低了共炭化体系的粘度,WEO丰富的脂肪结构提供了烷基自由基和活性位点.CDLP与WEO芳香组分间的协同作用有效促进了芳香碳层的生长和有序堆积.当WEO添加量为50％时,制备的针状焦表现出优异的微观结构和性能:纤维状和片状结构含量达到76.2％,理想石墨晶格含量高达89.7％,且具有良好的抗氧化性和导电性能,粉末电阻率达605.1mΩ·mm.本研究通过协同利用工业副产品,为针焦炭生产提供了一个具有成本优势的工艺路线.
Needle coke,a high-performance artificial carbon material,requires precise composition control of its raw materials as this critically determines the structural characteristics and performance of the final product.In this study,needle coke samples were prepared from coal direct liquefaction pitch(CDLP)and waste engine oil(WEO)through component optimization and a co-carbonization process.The microstructure and properties were investigated using the following characterization techniques:Fourier Transform Infrared Spectroscopy(FT-IR),Polarized Light Microscopy(PLM),Scanning Electron Microscopy(SEM),X-ray Diffraction(XRD),Raman Spectroscopy,Thermogravimetric Analysis(TGA),Micro-Strength(MS)and Powder Resistivity(PR).The co-carbonization mechanism of CDLP and WEO was systematically investigated.The results indicated that the incorporation of WEO significantly reduced the viscosity of the co-carbonization system,and its abundant aliphatic structures provided alkyl radicals and active sites.The synergistic interaction of aromatic components between the CDLP and WEO effectively promoted the growth and order accumulation of aromatic carbon layers.When 50％WEO was introduced,the prepared needle coke exhibited an excellent microstructure and properties.The fibrous and leaflet structure content reached 76.2％,the ideal graphite lattice content reached 89.7％.These results demonstrated remarkable oxidation resistance and electrical conductivity,with a powder resistivity of 605.1 mΩ·mm.This work establishes a process with cost advantages for the production of needle coke.
张玉柱;齐源;朱亚明;程俊霞;赵雪飞
辽宁科技大学化学工程学院,辽宁鞍山 114051辽宁科技大学化学工程学院,辽宁鞍山 114051辽宁科技大学化学工程学院,辽宁鞍山 114051||辽宁科技大学化学工程学院辽宁省先进煤炭与焦化技术重点实验室,辽宁鞍山 114051辽宁科技大学化学工程学院,辽宁鞍山 114051辽宁科技大学化学工程学院,辽宁鞍山 114051
化学化工
针状焦共炭化煤直接液化沥青废机油
needle cokeco-carbonizationcoal direct liquefaction pitchwaste engine oil
《燃料化学学报（中英文）》 2026 (1)
104-116,13
Supported by the National Natural Science Foundation of China(22208138),the Nature Science Foundation of Liaoning Province(2024-MS-179),the Fundamental Research Funds for the Liaoning Universities(LJ222410146051,LJ212410146018).
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