劣质柴油加氢精制及其窄馏分烃族组成分析

石油炼制与化工 ›› 2015, Vol. 46 ›› Issue (2): 22-26.

劣质柴油加氢精制及其窄馏分烃族组成分析

张美洁,邓文安,李传,李庶峰

中国石油大学（华东）化学化工学院重质油国家重点实验室

收稿日期:2014-07-28 修回日期:2014-09-27 出版日期:2015-02-12 发布日期:2015-01-16
通讯作者: 邓文安 E-mail:dengwenan@upc.edu.cn

STUDY ON INFERIOR DIESEL HYDROTREATING AND HYDROCARBON GROUP COMPOSITION ANALYSIS OF NARROW FRACTIONS

Received:2014-07-28 Revised:2014-09-27 Online:2015-02-12 Published:2015-01-16

摘要/Abstract

摘要： 在3?300 mL的固定床加氢装置上，以劣质的催化裂化柴油为原料，在氢分压12 MPa、体积空速0.5 h-1、氢/油体积比800:1条件下，考察了反应温度对劣质柴油加氢精制效果的影响；并进一步研究了原料油及加氢精制生成油的窄馏分中烃族组成随馏程的变化规律。结果表明，在反应温度为370 ℃时，加氢精制效果较好，加氢精制生成油的密度为0.865 1 g/cm3，硫质量分数仅为27.51 μg/g，总芳烃脱除率达79.2%，十六烷指数提高15个单位；精制后的各窄馏分中双环及三环芳烃脱除率高达92%以上，而大多数单环芳烃与三环环烷烃集中在285~350 ℃馏分中，因此降低劣质柴油的密度、提高十六烷指数的关键是需要将该馏分段进一步加氢改质。

Abstract: The influence of hydrotreating temperature on the inferior FCC diesel oil was investigated at 12.0 MPa, volume space velocity of 0.5 h-1 and hydrogen to oil volume ratio of 800 in a three 300mL hydrogenation fixed bed in series. Raw material oil and the hydrotreated diesel oil were cut into narrow fractions, and the variation of hydrocarbon group compositions of the narrow fractions with distillation range was studied. The results show that at the optimum hydrotreating temperature of 370 ℃, the density of hydrotreated diesel is 0.865 1 g/cm3，the sulfur and the total aromatics content are 27.51 μg/g and 12.8%, respectively and the cetane index increases 15 points. Over 92% of bicyclic and tricyclic aromatic hydrocarbon of every narrow fraction is removed. It is found that most of single-ring aromatics and tricyclic naphthenic is concentrated in 285~350 ℃fraction range, which is required further hydro-upgrading to reduce the density and improve cetane number of inferior diesel oil.

张美洁邓文安李传李庶峰. 劣质柴油加氢精制及其窄馏分烃族组成分析[J]. 石油炼制与化工, 2015, 46(2): 22-26.