中低温煤焦油加氢生产清洁燃料技术的开发及工业应用

中国石化抚顺石油化工研究院开发的煤焦油高压加氢处理与加氢裂化两段加氢组合工艺生产清洁燃料油技术在某炼油厂160 kt/a煤焦油加氢装置的工业应用结果表明，以煤焦油预处理后的小于500 ℃馏分油为原料，在反应压力为15.0 MPa、氢油体积比为1 000、加氢处理反应温度为（基准+10）℃、体积空速为（基准+0.2）h-1、加氢裂化反应温度为（基准+30） ℃、体积空速为（基准+0.2）h-1的条件下，小于160 ℃馏分硫质量分数为3.3 μg/g，辛烷值（RON）为65.3，可作为低硫石脑油；160～375 ℃柴油馏分的密度为0.852 5 g/cm3，十六烷值为49.5，凝点为-10 ℃，是优质的柴油调合组分；大于375 ℃加氢裂化尾油硫质量分数为2.6 μg/g，芳烃质量分数为2.0%，是很好的润滑油基础油原料。

DEVELOPMENT AND COMMERCIALIZATION OF CLEAN FUELS PRODUCTION TECHNOLOGY FROM MEDIUM AND LOW TEMPERATURE COAL TARS

Two-stage hydrogenation process of high pressure hydrotreating and hydrocracking is adopted to produce clean fuels from medium and low temperature coal tars. The technology developed by Fushun Research Institute of Petroleum and Petrochemical (FRIPP) is applied in a coal tar hydrotreating unit with a capacity of 160 kt/a. The <500 ℃ fraction after pretreatment of coal tar was used as a feedstock. Under the reaction conditions of 15.0 MPa, oil/ hydrogen volume ratio of 1 000, hydrotreating temperature of (base+10) ℃ and Sv of (base+0.2)，hydrocracking temperature of (base+30) ℃ and Sv of (base+0.2), the sulfur content and octane number（RON）of the fraction below 160 ℃ is 3.3 μg.g-1 and 65.3, respectively, which could be used as a low sulfur naphtha; the diesel fraction of 160～375 ℃ has a density of 0.852 5 g.cm-3, the cetane number is as high as 49.5, and the solidifying point is -10 ℃, which could be used as a high quality diesel blending component; fraction beyond 375 ℃ with sulfur of 2.6 μg.g-1 and the aromatics of 2.0% could be used as a good raw of lube base oil.