Abstract: In order to upgrade the diesel product quality, a high performance hydrodesulfurization catalyst RS-2000 developed by RIPP, has been used in No. 4 diesel hydrotreating unit in Zhenhai Refining & Chemical Company, Sinopec. Industrial application results show that using a feedstock blended with 15.5 % CGO, under the process conditions of 5.3MPa in cold high pressure separator, liquid hour space velocity of 2.0 h-1, inlet temperature of the reactor of 352—354 ℃, average bed temperature of 371—373 ℃, and gas to oil volume ratio at the reactor entrance of about 310, RS-2000 catalyst exhibited excellent capability of hydrodesulfurization and hydrodenitrogenation. The sulfur content of diesel product is reduced to lower than 20 μg/g, and the quality of diesel product meets the national diesel standard of grade IV. The sulfur removal rate reaches to 99.7 %, and the nitrogen removal rate is up to 98.0 %. Furthermore, the properties of diesel product have certain improvement, such as cetane number and the content of poly-aromatic hydrocarbons.

Key words: diesel hydrotreating, RS-2000 catalyst, national IV emission standard, industrial application