馏分油液相加氢技术工业应用前景展望

液相加氢技术与常规滴流床相比具有投资低、能耗低的巨大优势,但在柴油液相加氢应用过程中由于受到硫化氢累积的限制,难以具备大规模商业化的价值.从介绍液相加氢技术原理入手,阐述液相加氢的反应扩散过程及其在强化反应传质、简化装置流程方面的特点.介绍了国内科研团队针对柴油液相加氢技术的不足所进行的核心突破并建立液相加氢技术平台,依次介绍了液相加氢技术在喷气燃料及重整生成油方面的成功应用.其中,柴油液相加氢技术实现在缓和条件下生产硫质量分数低于10μg/g的国Ⅵ柴油;喷气燃料液相加氢技术实现在常减压装置侧线生产合格3号喷气燃料;重整生成油选择性液相加氢脱烯烃技术与重整装置深度耦合,精制后全馏分重整生成油溴指数降低到100[mgBr/(100 g)]以下.最后,对液相加氢技术平台的拓展应用提出可行性建议.

Prospect of industrial application about liquid phase hydrogenation of distillates

Comparing with traditional trickle-bed hydrogenation technology, liquid phase hydrogenation has a great advantage of investment saving and low energy consumption. However, diesel liquid phase hydrogenation will not have commercial value unless hydrogen sulfide accumulation is solved in reaction process. This paper begins with the introduction of technical principles of liquid phase hydrogenation. Then the diffusion process of reactants and its technical characteristics of intensifying mass transfer and simplifying process flow are demonstrated. Furthermore, along with the technical disadvantages of diesel liquid phase hydrogenation, technical breakthroughs obtained by domestic research team with the establishment of technology platform are listed, of which the successful application results of jet fuels and reformate hydrogenation is introduced respectively. The diesel liquid phase hydrogenation technology can produce National Ⅵ diesel with sulfur content less than 10 μg/g at a wild reaction condition;the jet fuel liquid phase hydrogenation technology realizes producing No.3 jet fuel at side line of crude oil units;the reformate liquid phase selectively hydrogenation technology is deeply coupled with reforming units, and bromine index of the refined reformate is less than 100 mgBr/(100 g). At last, feasible suggestions are proposed to expand applications of liquid phase hydrogenation technology.