Objective The study was carried in order to further meet the market demand of reducing the ratio of diesel to gasoline and producing more chemical raw material and solve the problem that the content of sulfur,nitrogen and aromatics int the raw materials increased by mixing higher proportion of catalytic diesel and other inferior raw materials in diesel hydrogenation unit.Methods On the basis of optimizing the preparation process of catalyst support,auxiliary agent,active metal ratio and impregnation method,the CNOOC Institute of Chemicals and Advanced Materials developed hydrocracking prerefining catalyst CHT-1 for inferior diesel.Results Compared with the commercial reference catalyst,CHT-1 had better hydrodenitrification activity and hydrodearomatization activity and the reaction temperature was reduced by at least 10 ℃ at the same hydrodenitrification rate.The pilot evaluation results showed that CHT-1 had excellent feedstock adaptability,excellent activity stability and regeneration performance at 6.4 MPa and 10.0 MPa.Conclusions The industrial CHT-1 catalyst had been used in an inferior catalytic diesel hydrogenation unit,and the calibration results show that CHT-1 catalyst has excellent catalytic activity and good adaptability for inferior diesel.
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