A kind of graded packing method of heavy oil hydrotreating catalyst

Abstract

A gradation loading method for heavy oil hydrotreating catalysts, the reaction system includes two or more hydrogenation reactors in series, starting from the second reactor, in the same reactor, according to the order of contact with the reactant stream , both the catalyst activity and the possible pore size show a decreasing trend; in two adjacent reactors, according to the order of contact with the reactant stream, the activity of the catalyst at the bottom of the former reactor is lower than that of the catalyst at the top of the latter reactor, and the catalyst at the bottom of the former reactor The pore diameter of the catalyst at the top of the latter reactor is not greater than the pore diameter of the catalyst at the top of the latter reactor; at the same time, the activity of the catalyst at the bottom of the former reactor is lower than that of the catalyst at the bottom of the latter reactor, and the pore diameter of the catalyst at the bottom of the former reactor is larger than that of the catalyst at the top of the latter reactor Can be several apertures.

Description

technical field [0001] The method belongs to the gradation loading method of heavy oil hydrotreating, more specifically, it is a series reaction system of multiple reactors suitable for processing high-sulfur heavy oil. Background technique [0002] In the fixed-bed residual oil hydroprocessing technology, major companies in the world use catalyst graded packing technology, that is, use two or more catalysts with different functions, including hydrogenation protecting agent, hydrodemetallization catalyst, For hydrodesulfurization catalysts, hydrodenitrogenation catalysts, etc., the loading sequence is generally to use raw material oil to contact with hydroprotectant, hydrodemetallization, hydrodesulfurization, and hydrodenitrogenation catalysts in sequence. The graded packing of the catalyst can not only increase the fouling capacity of the catalyst bed, but also significantly reduce the pressure drop of the catalyst bed; the use of the catalyst graded packing technology can...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for effectively controlling the temperature rise of the bed layer and realizing synchronous deactivation of catalysts of different brands in view of the problem that the bed temperature rise of the residual oil hydrotreating catalyst is relatively large and the deactivation of different brands of catalysts is prone to be out of sync. Catalyst loading method for residual oil hydrotreating

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