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大连石化自渣油加氢装置开工以来,四催化原料主要以加氢渣油作为催化重料,再调合一些二蒸馏馏分油、酮苯蜡下油以及加裂尾油,其中加氢渣油约占80%。催化原料的变化,也造成产品分布的变化,主要是油浆产率明显增加,液化气产率有所下降。采集并分析了6个样品的一般性质、化学组成及平均结构参数,一般性质包括密度、黏度、平均相对分子质量、残炭、馏程;化学组成包括元素组成(C、H、S、N)、微量金属元素组成(Ni、V、Ca等)和四组分族组成(饱和分、芳香分、胶质和沥青质);平均结构参数如fA(芳碳率)、fN(环烷碳率)、fP(开链饱和碳率)、RT(总环数)、RA(芳环数)、RN(环烷环数)、HAU/CA(缩合度参数)和σ(芳香环系周边氢的取代率),通过实验装置评价了不同催化原料的反应性能,并与工业数据进行对比。分析表明:液化气收率、重油收率、总轻油收率及总液体收率等关键指标与原料芳碳率及H/C原子比几乎均呈线性关系;芳碳率及H/C原子比的差异是导致催化原料可裂化性能差异的主要原因。
Dalian petrochemical self-residue hydrogenation unit since the start of the four catalytic raw materials mainly hydrogenated residue as the catalytic heavy material, and then blending some of the two distillate distillate, ketone benzene wax oil and cracked tail oil, including hydrogenated residue About 80%. Catalytic changes in raw materials, but also result in changes in product distribution, mainly oil yield increased significantly, liquefied gas production rate decreased. The general properties, chemical compositions and average structural parameters of six samples were collected and analyzed. The general properties include density, viscosity, average relative molecular weight, residual carbon and distillation range. The chemical composition includes elemental composition (C, H, S, N) , Trace metal elements (Ni, V, Ca, etc.) and four groups (saturation, aromatics, gums and asphaltenes); average structural parameters such as fA (aromatic carbon), fN ), FP (open chain saturated carbon rate), RT (total number of rings), RA (number of aromatic rings), number of RNs (number of rings), number of HAU / CA (degree of condensation) and σ Substitution rate), the reaction performance of different catalytic raw materials was evaluated by an experimental device, and compared with the industrial data. The analysis shows that the key indicators such as liquefied gas yield, heavy oil yield, total light oil yield and total liquid yield have almost linear relationship with the aromatic carbon ratio and H / C atomic ratio; The difference is the main reason that leads to the difference of the catalytic properties of the raw materials.