摘要
我国石油短缺,对数量可观的煤焦油进行加氢生产燃料油和精细化学品具有重要意义。以煤焦油预处理后的3种轻质馏分油混合油为原料,在固定床加氢装置上进行了轻质油全馏分加氢提质试验研究,考察了反应温度、反应压力、空速和氢油比对原料油脱硫脱氮及芳烃加氢饱和的影响。最后对加氢提质产物油性质进行分析。结果表明,产物氮、硫及芳烃含量均随着反应温度、压力、氢油比的增大而减少,随着空速的增大而增大;在反应温度为360℃,反应压力为16 MPa,液体体积空速为0.25 h^(-1),氢油比为1 800的最优工艺条件下,液体收率达到98.03%。对加氢后全馏分油进行精密蒸馏切割得到<170℃的石脑油馏分和>170℃的柴油馏分;石脑油馏分20℃密度为776.9 kg/m^3,几乎不含硫、氮,芳烃潜含量67.6%,可以作为优质的催化重整原料;加氢后的柴油馏分不含硫、氮,芳烃含量低,闪点高,凝点低,馏程适宜,可以作为柴油的调和油。
Because of the shortage of petroleum in China,it has great significance to produce fuel oil and fine chemicals from the hydrogenation of considerable amount of coal tar.Three kinds of mixed oil from light distillated oil were used as raw feedstocks to carry out the hydro-refining experiment in a fixed bed hydro-refining unit.The influence of reaction pressure and temperature,liquid volume space velocity,hydrogen/oil ratio on the produced oil properties were investigated.The results indicate that the nitrogen content,sulfur content and aromatic content of products decrease with the increase of reaction temperature,pressure and hydrogen/oil ratio,but increase significantly with the rising of liquid volume space velocity.Under the optimum condition of the reaction temperature at 360 ℃,reaction pressure at 16 MPa,liquid volume space velocity at 0.25 h-1 and the ratio of hydrogen/oil at 1 800,the yield of the produced oil is up to 98. 03%.The produced oil is distilled to obtain naphtha 〈170 ℃ and diesel oil 〉170 ℃.The naphtha fraction has a density of 776.9 kg/m^3 at 20 ℃,no sulfur and nitrogen are detected,and the latent content of aromatics is 67.6%.It can be used as a high quality catalytic reforming raw materials.Diesel fuel has low aromatics content,without sulfur nitrogen,high flash point,low condensation point and is suitable for distillation,thus it can be used as a blend of diesel oil.
作者
胡发亭
HU Fating(Coal Chemistry Branch of China Coal Research Institute, Beijing 100013, China;State Key Laboratory of Coal Mining and Clean Utilization, Beijing 100013, China)
出处
《洁净煤技术》
CAS
2018年第2期96-101,共6页
Clean Coal Technology
基金
国家重点研发计划资助项目(2016YFB0600303)
关键词
中低温煤焦油
加氢提质
石脑油馏分
柴油馏分
芳烃加氢饱和
mid-low temperature coal tar
hydro-refining
naphtha
diesel oil
aromatics hydrogenation saturation
