为实现柴油产品质量升级，选择抚顺石油化工研究院研制的新一代加氢精制催化剂FF-66替换原加氢精制催化剂FF-36，与加氢裂化催化剂FC-20组合使用生产国Ⅵ低凝柴油。结果表明，采用FF-66/FC-20组合催化剂处理催化柴油、焦化汽油和直馏柴油组成的混合原料（平均硫含量为2 742 μg/g），标定工况下的柴油产品硫含量降低至4.5 μg/g，氮含量降低至0.35 μg/g，多环芳烃质量分数降低至3.3%，十六烷值提高了3.5个单位，凝点降至-24℃。说明FF-66/FC-20催化剂活性匹配良好，具有优异的脱硫、脱氮性能和十六烷值增值能力，能够满足柴油加氢改质异构降凝装置生产国Ⅵ低凝柴油的需求。

In order to upgrade the quality of diesel products,FF-66,a new generation hydrofining catalyst developed by Fushun Research Institute of Petroleum and Petrochemicals,is selected to replace previous FF-36 hydrofining catalyst,and is used jointly with hydrocracking catalyst FC-20 to produce low pour point diesel oil meeting China's national Ⅵ standard.Results show when the mixing feedstocks composing of catalytic diesel oil,coking gasoline and straight run diesel oil,with an average sulfur content of 2,742 μg·g^-1,is treated by FF-66/FC-20 composite catalyst under calibration conditions,the sulfur content of diesel product drops to 4.5 μg·g^-1,the nitrogen content drops to 0.35 μg·g^-1,polycyclic aromatic hydrocarbon content drops to 3.3%,the cetane number increases by 3.5 units,and the condensation point decreases to -25℃.It is indicated that FF-66/FC-20 catalyst has good activity matching,excellent desulfurization and denitrification performance and cetane value-added ability,over which low pour point diesel meeting China's national Ⅵ standard can be produced in diesel hydrotreating and upgrading isomerization pour point reduction unit.