摘要
采用超临界技术萃取分离大港常压渣油 ,可有效的脱除一些喹啉不溶物和固体杂质 ,且获得相对分子质量分布窄、反应性均一的组分。该组分经加压缩聚 ,不仅提高炭化收率 ,还可进一步改善性能 ,为制备高性能炭材料提供有效的途径。通过元素分析、族组成分析和核磁共振等手段对原料的组成、结构进行了表征 ,并借助于热台偏光显微镜技术考察了所得中间相沥青液相炭化过程中的中间相转化行为。结果表明 。
The supercritical fluid extraction not only removed the solid particals and the quinoline insoluble particles from Dagang petroleum residue, but also produced a number of pitch fractions, many of which presented narrow distribution of relative molecular mass and homogenous reactivity. Heat treatment of these fractions under autogenous pressurized at 420 ℃ increased the coke yield and modified the constitution of the precursor, which provided an effective means to prepare carbon materials with high properties. The starting materials were characterized by means of elemental analysis, HS, TS, PS fraction distributions, 1H NMR and 13 C NMR to reveal the intricate thermal behaviors. The hot stage polarized optical microscope has been employed to investigate the mesophase transformation of two different fractions in carbonization. The results showed that the mesophase developed essentially as the raw materials contained suitable contents of naphthenic carbon, alkyl carbon and presented narrow distribution of relative molecular mass.
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
2002年第2期54-58,共5页
Acta Petrolei Sinica(Petroleum Processing Section)
