Preparation method of 3DOM bulk hydrogenation catalyst

Abstract

The invention discloses a preparation method of a 3DOM bulk hydrogenation catalyst, belonging to the technical field of catalysts. The preparation method comprises the following specific steps: (1) dissolving an emulsifier in water under the protection of inert gas, conducting heating to 70-75 DEG C, then adding methyl methacrylate, keeping the temperature for 15-20 minutes, then adding an initiator, conducting reacting for 1-1.5 hours, performing cooling to room temperature, and successively carrying out centrifugal assembling and drying to obtain a a PMMA microsphere template; (2) sequentially dissolving an active component precursor and an auxiliary agent into an alcohol solution to obtain a precursor solution; and (3) adding a PMMA microsphere template into the precursor solution, carrying out dipping and drying, repeating the dipping and drying steps 1-2 times, and finally, carrying out roasting for 5 hours under the condition of 400-600 DEG C to obtain the 3DOM bulk hydrogenation catalyst. The 3DOM bulk hydrogenation catalyst prepared by the invention has a large and ordered pore structure, and sulfur-containing macromolecules can enter internal pores, so the desulfurization activity of the catalyst is greatly improved.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a method for preparing a 3DOM bulk hydrogenation catalyst. Background technique [0002] With the progress of the society and the development of the economy, the human demand for petroleum products is increasing, and the existing phenomenon of heavy and inferior petroleum is becoming more and more serious. The existence of sulfur, nitrogen, and oxygen compounds in petroleum will not only affect the processing of petroleum, but also affect the quality of products. At the same time, sulfur-containing compounds pose a huge threat to the environment and human health. The national VI standard for oil products implemented in my country stipulates that the sulfur content should be lower than 10ppm, so it is particularly important to produce more active hydrodesulfurization catalysts to remove sulfur-containing compounds (benzothiophene, dibenzothiophene, etc.) in oil products . [0...

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Problems solved by technology

[0003] Hydrogenation catalysts in the prior art mainly include supported type and bulk type. The traditional supported catalyst is limited by the double limitation of metal loading and carrier interaction, and its hydrogenation depth has certain limitations, which is difficult to meet the current demand for oil products. Hydrogenation Depth Requirements

Compared with the traditional supported hydrodesulfurization catalyst, the bulk catalyst has the advantages of no support, high catalytic activity, less catalyst loading, energy saving, and its active components are dense, which has a depth beyond the reach of traditional supported catalysts. Hydrogenation potential, but it does not use a carrier, which makes the metal dispersion of the bulk catalyst poor and the utilization rate low, resulting in its inability to fully exert its deep hydrogenation activity, which has become a major problem limiting its practical application

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