Heavy-oil hydrotreatment catalyst, and preparation and application thereof

Abstract

The invention discloses a heavy-oil hydrotreatment catalyst, and preparation and application thereof. The catalyst comprises an aluminium oxide carrier and a hydrogenation active metal composition. The carrier has a double-peak pore structure, and characterized by mercury intrusion porosimetry, the carrier has the pore volume larger than 0.4 mL / g and less than 0.8 mL / g and the specific surface area of 100-400 m<2> / g, the pore volume of pores with the diameter of 6-20 nm accounts for 60-90% of the total pore volume, and the pore volume of pores with the diameter of 100-300 nm accounts for 3-20% of the total pore volume. Compared with the prior art, the provided catalyst has relatively good hydrodesulfurization performance when being applied to residuum hydrotreatment.

Description

technical field [0001] The invention relates to a heavy oil hydrotreating catalyst and its preparation and application. Background technique [0002] Residue oil (heavy oil) hydrogenation technology is one of the key technologies for efficient utilization of residue oil. A series of catalysts are the core of residue oil hydrogenation technology. Residue oil hydrogenation series catalysts adopt hierarchical packing technology, and catalysts with different functions are used in combination. Among them The residual oil hydrodesulfurization catalyst is one of the main catalysts in the residual oil hydroprocessing technology, and is usually located at the back of the catalyst bed. In the residual oil fixed bed reactor, the raw material along the flow direction first contacts the protective agent and the metal removal agent, and after passing through the bed, most of the metal Ni and V are removed, and some reactive sulfides are also removed. Therefore, in the desulfurization cat...

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Problems solved by technology

[0004] The disadvantage of existing heavy oil hydrogenation catalysts is that their S, N removal rates, heavy metal removal rates and asphaltenes removal rates cannot be well matched. For example, catalysts with high metal removal activity often S, N removal rate and carbon residue removal rate are not high

[0008] However, the desulfurization efficiency of these catalysts is generally low

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