Abstract: To meet the requirement of producing national standard V diesel, SINOPEC Guangzhou Co. tried to produce national V diesel in the 2.0 Mt/a diesel hydrotreating unit in January 2015. Trial production results show that compared with the production of phase IV diesel, the higher operation severity can meet the phase V diesel quality requirements by increasing the reaction temperature and decreasing space velocity. Reaction temperature, feedstock properties, processing throughput, recycle hydrogen purity and other factors all influence the sulfur content of diesel product. Under the same reaction conditions, the effect of the 95% distillate temperature on product sulfur content is more obvious than the sulfur content of feed.

Key words: diesel hydrotreating, ultra-deep desulfurization, feedstock properties, influencing factors