劣质混合馏分油加氢改质生产清洁柴油

以环烷基原油生产的直馏柴油、催化柴油与焦化汽柴油的混合馏分油为原料,在200 mL串联固定床加氢装置上进行加氢改质试验,重点考察劣质含酸高氮馏分油加氢改质后能否满足GB 19147-2009车用柴油质量要求.结果表明,混合馏分油氮含量高,十六烷值低,采用目前传统的加氢精制技术与加氢改质技术进行加氢处理,柴油产品难以满足...

Study on hydro-upgrading of poor-quality mixed distillate oil to clean diesel oil

The hydro-upgrading experiments for mixed distillate oil of straight-run diesel, FCC diesel and mixed coker distillates were investigated in 200 mL series fixed-bed hydrogenation units. The key point of the experiments was whether the poor-quality mixed distillate oil with high acid value and high nitrogen- content after the hydro-upgrading could meet GB 19147-2009 motor diesel requirements. The results showed that due to high nitrogen and low cetane number of mixed distillate oil, the diesel products after hydrogenation using traditional hydrotreating and hygro-upgrading technology in industry could not meet the demand of cetane number. After the improvement scheme of catalyst loading was adopted in which the hydro-upgrading catalyst and hydro-cracking catalyst were loaded in subsection bed in the hydro-upgra- ding reactor, and under the reaction condition of reaction pressure 12 MPa, hydrotreating reactor/hydro- upgradi cetane 7.6μg ng reactor temperature 340 ℃/360℃,H2/oil volume ratio 600 and feed rate 200 mL ~ h-1 ,the number of product reached 46.6, the contents of sulfur and nitrogen was 40.6 μg·g^-1 and 7.6μg·g^-1respectively and solidifying point was -22.8 ℃. The product could meet the demand ofGB 19147-2009 motor diesel of -20#. In this paper,a new route was explored which aimed at producing clean diesel from mixed distillate oil with low quality acid and high nitrogen. It is feasible to produce clean diesel of GB 19147-2009 under the selective mix ratio of different feeds, catalyst loading scheme and operation conditions, which has important significance to improve economic benefit of the refinery processing naphthenie-based crude oils.