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Catalyst grading technology for promoting the diesel hydrocracking to naphtha

Petroleum Science 2023年第6期20卷 3798-3806页

作者： Jia-Qi Ge Peng Zhang Fa-Min Sun Ze-An Xie Zhi-Jie Wu Bai-Jun Liu State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing102249China Petrochemical Research Institute PetroChina Company LimitedBeijing102206China Daqing Petrochemical Research Center PetroChina Company LimitedDaqing163714HeilongjiangChina Institute of Catalysis for Energy and Environment Shenyang Normal UniversityShenyang110034LiaoningChina

This paper reports the application of multi-component hydrocracking catalyst grading technology in diesel hydrocracking system to increase naphtha,and studies the influence of catalyst systems with different number of graded beds on the reaction process of diesel *** hydrocracking catalysts with different physicochemical properties as gradation components,the diesel hydrocracking reaction on catalyst systems of one-component,two-component and three-component graded beds with different loading sequences are carried out and evaluated,*** catalytic mechanism of the multi-component grading system is *** results show that,with the increase of the number of grading beds,the space velocity of reaction on each catalyst increases,which can effectively control the overreaction process;along the flow direction of feedstock,the loading sequences of catalysts with acidity decreasing and pore properties increasing can satisfy the demand of different catalytic activity for the conversion of reactant with changing composition to naphtha,which has a guiding role in the conversion of feedstock to target ***,the conversion of diesel,the selectivity and yield of naphtha all increase significantly on the multi-component catalyst *** research on the grading technology of multi-component catalysts is of great significance to the promotion and application of catalyst systems in various catalytic fields.

关键词： grading technology Multi-component catalysts Hydrocracking Diesel Naphtha

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