Abstract: Continuous liquid-phase diesel hydrotreating process requires no recycle hydrogen system, so its investment and energy consumption are lower compared to those of traditional trickle bed technologies. On this basis, the second-generation hydrotreating technology integrates the hot high pressure separator into the upflow reactor, further reducing the floor area and investment. It has significant technical and economic advantages. The process simulation proves that the solubility of hydrogen is proportional to the pressure, temperature and hydrogen purity. Higher pressure, temperature and hydrogen purity leads to higher solubility of hydrogen, which promotes the hydrotreating reaction

Key words: Liquid phase hydrotreating, Second-generation technology, Hydrogen partial pressure