劣质原料油加氢改质技术的应用优化研究

研究了两种不同劣质原料油通过加氢改质反应生产优质国Ⅵ柴油调合组分。首先，在相同工艺条件下，考察了原料油性质对加氢改质产品分布以及性质的影响；其次，以此两种劣质原料油加氢改质所得的混合柴油为对象，考察轻、重柴油切割点对柴油密度、组成、十六烷值等性质的影响。结果表明：随着轻、重柴油切割点的提高，轻柴油与重柴油的密度、链烷烃含量以及十六烷值均逐渐增加；轻柴油十六烷值低，是劣质的柴油调合组分，但可以作为催化裂化原料；重柴油十六烷值高，但由于其凝点高，需要将其中更重的组分切出后，才能够作为优质的0号国Ⅵ柴油调合组分；对于上述两种混合柴油，轻、重柴油切割点控制在230℃，在控制凝点为0℃的前提下，重柴油组分收率最高，而且十六烷值能够满足国Ⅵ柴油标准要求。

APPLICATION OPTIMIZATION OF HYDROUPGRADING TECHNOLOGY FOR INFERIOR FEEDSTOCK

The China Ⅵ standard compliant diesel fuel blending component was produced by hydro-upgrading two inferior raw oils. Under the same process conditions，the effect of the properties of the feedstocks on the distribution and properties of the hydro-upgraded products was investigated. The diesels from above two tests was mixed and used as raw material to investigate the effect of cut temperature for separation of light and heavy diesel on the properties of diesel density，composition, and cetane number. The results showed that the density，paraffin content，and cetane number of the light diesel and heavy diesel gradually increased with the increase of the cut point. The light diesel had a low cetane number and was a low-quality diesel blending component, and could be used as a raw material for catalytic cracking. The heavy diesel had a high cetane number，but with a high freezing point and needed to remove higher components further to become a high-quality No.0 China Ⅵ standard diesel blending component. In the case of above mixed diesel，at the conditions of cut point of 230℃and the freezing point at 0℃，the yield of heavy diesel components was the highest，and the cetane number could meet with the requirements of China Ⅵ standard.