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乙烯焦油是乙烯生产过程中的原料高温缩合产物,化学组分多,目前主要用作燃料油,经济价值较低,且燃烧时易产生结焦及黑烟,污染环境。乙烯焦油常压馏分(初馏点至210℃)直接作为汽油调合组分指标相差较大,利用乙烯焦油中初馏点至210℃常压馏分生产汽油调合组分的工艺方案,采用雅宝KF-757催化剂,考察加氢反应条件(反应温度、反应压力、空速、氢油比、催化剂稳定性)对常压馏分油性质的影响。通过对常压馏分油和加氢馏分油的性质比较,在温度355℃、压力6.0MPa、空速1.2h-1和氢油比450∶1的条件下,经加氢精制、蒸馏分离提纯后,基本满足车用汽油(V)指标要求,可以作为汽油的调合组分油。在整个实验过程中,催化剂一直保持较高的活性。后续中试放大研究中,将考察催化剂抗积炭能力、反应热效率、长期稳定性等,并补充反应物料平衡数据及公用工程损耗。
Ethylene tar is a high-temperature condensation product of raw materials in the ethylene production process, and has many chemical components. Currently, it is mainly used as a fuel oil and has low economic value. Coking and black smoke are easily generated when burning, which pollutes the environment. Ethylene tar atmospheric distillation (initial boiling point to 210 ℃) directly as a gasoline component of the difference between the larger index, the use of ethylene in the initial boiling point to 210 ℃ atmospheric distillation of gasoline components of the process, the use of Ya Po KF-757 catalyst, the effects of hydrogenation conditions (reaction temperature, reaction pressure, space velocity, hydrogen to oil ratio, catalyst stability) on the properties of atmospheric distillates were investigated. By comparing the properties of atmospheric distillate and hydrogenated distillate, the products were purified by hydrofinishing, distillation and separation under the condition of temperature 355 ℃, pressure 6.0MPa, space velocity 1.2h-1 and hydrogen-to-oil ratio 450:1 , Basically meeting the requirements of automobile gasoline (V) index, and can be used as blending component oil of gasoline. Throughout the experiment, the catalyst has maintained a high activity. Follow-up pilot enlargement study will examine the catalyst anti-carbon deposition capacity, thermal efficiency, long-term stability, etc., and add the reaction material balance data and utility losses.