A kind of start-up method of hydrogenation catalyst

Abstract

The invention discloses a start working method of a hydrogenation catalyst. The start working method comprises following steps: 1, a sulfuration-type hydrogenation catalyst is delivered into a reactor; 2, an insert gas is introduced into the reactor to replace air in the reactor, and the sulfuration-type hydrogenation catalyst is subjected to sulfuration in the insert gas atmosphere; 3, after sulfuration, the inert gas is replaced by hydrogen gas, the pressure and the temperature in the reactor are adjusted to a reaction pressure and a reaction temperature when gas flow is stable, and a raw material oil is introduced for hydrogenation, wherein the sulfuration-type hydrogenation catalyst comprises a hydrogenation active metal component, a carrier, and an organic compound. In start working sulfuration, the metal on the surface of the hydrogenation catalyst is subjected to in-suit sulfuration directly, generation reaction of hydrogen sulfide and sulfuration reaction of hydrogen sulfide with active metal are not needed, the initial sulfuration temperature in catalyst start working is increased greatly, rapid temperature increasing in catalyst sulfuration is avoided, and start working time is shortened greatly.

Description

technical field [0001] The invention relates to a catalyst start-up method, in particular to a hydrogenation catalyst start-up method. Background technique [0002] Residue is the heaviest fraction of crude oil and contains high concentrations of metals and asphaltenes. The nature of catalyst deactivation is determined by the nature of special raw materials, and the deactivation of residual oil catalyst mainly depends on metal deposition and coke formation. These impurities cover the surface of the catalyst, reducing the number of active centers, or blocking the pores of the catalyst, hindering the utilization of the inner surface, resulting in the decay of the catalyst activity. Metals in residual oil mainly exist in the form of organometallic compounds (such as nickel and vanadium mainly exist in the form of porphyrin compounds and asphaltenes), these metal compounds decompose during the reaction, and heavy metals are deposited on the catalyst to block the catalyst pores ...

AI Technical Summary

Problems solved by technology

In order to avoid excessive temperature rise, the vulcanization process heats up slowly, but this will cause the catalyst vulcanization time to be too long, which is not conducive to shortening the start-up time

Furthermore, both the existing internal presulfurization and external presulfurization will cause insufficient vulcanization of the active metal component in the hydrogenation catalyst, poor dispersion of the active metal, and the inability of the active metal component to fully play its role, resulting in metal waste

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