为配合柴油产品质量整体升级的需要,中国石化镇海炼化分公司Ⅳ套柴油加氢装置采用中国石化石油化工科学研究院最新研发的RS-2000超深度加氢脱硫催化剂进行生产.装置满负荷(357 t/h)标定结果表明,对焦化柴油比例为15.5％的混合原料(平均硫质量分数为0.974％～0.999％),在冷高压分离器压力5.3 MPa、体积空速2.0h-1、反应器入口温度352～354℃、床层平均温度371～373℃、反应器入口气油体积比约为310的条件下,精制柴油产品的硫质量分数小于20 μg/g,各项性质达到国Ⅳ排放标准对柴油的质量要求.标定期间的平均脱硫率为99.7％,平均脱氮率为98.0％,说明RS-2000催化剂具有较高的脱硫、脱氮活性.同时,柴油产品的十六烷值和多环芳烃含量等性质也得到一定程度的改善.%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 of SINOPEC.Industrial application results show that using a feedstock blended with 15.5％ CGO,under the process conditions of 5.3 MPa 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 Ⅳ Emission Standard.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.
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