加氢工艺处理煤液化加氢稳定油的研究

加氢精制与加氢改质都是煤液化加氢稳定油高附加值利用的有效途径。实验结果表明,两种工艺在产物分布、化学氢耗与装置液体收率以及产品质量等方面存在明显差异。与加氢精制工艺相比,加氢改质工艺得到的高附加值产品(重石脑油+喷气燃料)收率高、喷气燃料与柴油产品品质更佳、重石脑油芳烃潜含量相对较低,但仍为优质的重整原料;在反应温度360℃/380℃、体系压力16.0 MPa、体积空速0.69 h-1、氢油体积比800∶1的反应条件下重石脑油与喷气燃料总收率为42.5%,重石脑油芳烃潜含量为76.11%,喷气燃料烟点为26 mm、改质柴油十六烷值提升到49,表明加氢改质为更优的煤液化加氢稳定油处理工艺。

Study on hydrogenation technology for treating coal liquefaction hydrogenation stabilized oil

Hydrofining and hydro-upgrading are both effective ways to use high value-added utilization of coal liquefaction hydrogenation stabilized oil. The experimental results show that there are obvious differences in product distribution, chemical hydrogen consumption, liquid yield and product quality between the two processes. Compared with hydrofining process, the yield of high value-added products(heavy naphtha + jet fuel) obtained by hydro-upgrading process is higher, the quality of jet fuel and diesel product is better, the aromatics potential content of heavy naphtha is lower, but it is still a high-quality reforming feedstock. The total yield of heavy naphtha and jet fuel is 42.5%, the aromatics potential content of heavy naphtha is 76.11%, the smoke point of jet fuel is 26 mm, and the cetane number of modified diesel fuel is 49 under the reaction conditions that the temperature is 360/380 ℃, the system pressure is 16.0 MPa, the volume space velocity is 0.69 h-1 and the volume ratio of hydrogen to oil is 800∶1. The results indicated that the hydro-upgrading process is a better process for treating coal liquefaction hydrogenation stabilized oil.