In-situ sulfuration method for hydrogenation catalyst

Abstract

The invention relates to an in-situ sulfuration method for a hydrogenation catalyst. The method comprises the following steps: (a) filling the hydrogenation catalyst into a reactor, carrying out in-situ sulfuration, introducing startup oil when a hydrogenation catalyst bed is at a low temperature and dividing circulation gas of a hydrogenation apparatus into two parts; (b) allowing a first part of the circulation gas to be heated by a heating furnace to a temperature higher than the temperature at which a vulcanizing agent is decomposed into hydrogen sulfide through hydrogenolysis and introducing the vulcanizing agent into the first part of the circulation gas from the front or the rear of the heating furnace; (c) allowing a second part of the circulation gas not to be heated by the heating furnace and to be mixed with the first part of the circulation gas heated by the heating furnace and having the introduced vulcanizing agent, wherein an inlet temperature of the hydrogenation catalyst bed is lower than 160 DEG C before hydrogen sulfide penetrates the hydrogenation catalyst bed; and (d) after hydrogen sulfide penetrates the hydrogenation catalyst bed, finishing sulfuration of the catalyst according to a conventional in-situ hydrogenation catalyst sulfuration process. Compared with the prior art, the method provided by the invention enables performance of the catalyst to be effectively brought into play and realizes safe and smooth startup at the same time.

Description

technical field [0001] The invention belongs to the processing method of oil refining technology, and in particular relates to an in-device vulcanization method of a hydrogenation catalyst, that is, a vulcanization start-up vulcanization method of a hydrogenation unit. Background technique [0002] With the protection of the environment, environmental regulations around the world are becoming increasingly stringent, which requires the production of a large amount of clean, light and clean fuels. Hydrogenation technology is an effective means of cleaning products. Therefore, hydrogenation units have become the standard configuration of oil refineries. The number of hydrogenation units in China is increasing. [0003] The catalyst used in hydrogenation technology is a bifunctional catalyst, and its hydrogenation performance comes from metals. Metals are usually divided into two types: noble metals and non-noble metals, and non-noble metals mainly include Group VIB and Group VI...

AI Technical Summary

Problems solved by technology

For example, in the early stage of the sulfidation process, the catalyst needs a certain concentration of hydrogen sulfide at a lower temperature, or the catalyst is protected by a liquid to prevent the reduction or decomposition of certain components and then it is difficult to fully sulfide, but at this time, Due to the low temperature, the introduced sulfiding agent cannot be converted into hydrogen sulfide, so the performance of the catalyst cannot be fully exerted