摘要
通过实沸点蒸馏和分子蒸馏对长庆原油的常压渣油进行减压蒸馏获得不同终馏点的减压蜡油,采用常规分析方法对其进行分析,并通过电喷雾-傅里叶变换离子回旋质谱(ESI FT-ICR MS)分析氮化物的组成,然后在固定流化床装置上考察了其催化裂化性能。结果表明,切割点从500℃提高到580℃,可以增加15百分点的减压蜡油收率,且理化性质和催化裂化性能均未明显变差,液体收率和轻油收率略有降低。电喷雾-傅里叶变换离子回旋质谱对氮化物的分析表明,减压蜡油中的碱氮化合物以喹啉系为主,而非碱氮化合物以咔唑系为主,切割点对氮化物的类型并无明显影响。
Atmospheric residues(AR) from Changqing crude oil were cut into four kinds of vacuum gas oil(VGO) with different final boiling points(FBP) by true boiling point distillation and molecular distillation. Properties of obtained VGOs were analyzed by classical analysis methods. Further analysis of nitrogen compounds was carried out by electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry(ESI FT-ICR MS), and the catalytic cracking performance of obtained VGOs was investigated in a fixed fluidized bed reactor. Experimental results show that VGO yield can increase fifteen percent when the FBP increases from 500 to 580 ℃, but the properties and catalytic cracking performance of VGO are not changed much. However, the yields of light oil and liquid product decrease slightly. It has been found that nitrogen compound types in the four VGOs determined by ESI FT-ICR MS have no obvious difference. The basic nitrogen compounds are mainly quinolone derivatives while the non-basic nitrogen compounds are mainly carbazole derivatives.
引文
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