Preparation method of hydrodesulfurization catalyst

Abstract

The invention discloses a preparation method of a hydrodesulfurization catalyst. The preparation method of the hydrodesulfurization catalyst is as follows: using a coprecipitation method for preparation of a W, Ni, Al and Mg composite oxide precursor, introducing high molecular polyethylene glycol in the precipitation process, forming, washing, drying and roasting to obtain a catalyst intermediate, using a specific Co and Mo-containing impregnation liquid for impregnation, drying and roasting to obtain the hydrodesulfurization catalyst. The prepared catalyst is smaller in particle and larger in surface area, and enables an active metal to form a hybrid active center with excellently-matched hydrogenation performance and hydrogenolysis performance in the premise of uniform dispersion of the active metal, so that the hydrogenation and hydrogenolysis desulfurization effects of the catalyst active component can be better cooperatively played, ultra-deep desulfurization can be achieved, meanwhile no excess hydrogen consumption is produced, and the processing cost is reduced.

Description

technical field

[0001] The invention relates to a method for preparing a hydrodesulfurization catalyst, in particular to a method for preparing a diesel ultra-deep hydrodesulfurization catalyst. Background technique

[0002] The trend of high-sulfur crude oil caused by heavy and inferior crude oil is further expanding. According to reports, currently the world's low-sulfur crude oil accounts for only 17wt%, and high-sulfur crude oil with sulfur content > 2wt% is as high as 58wt%.

[0003] The SOx, NOx, CH and soot emitted during the combustion process of sulfur, nitrogen and aromatics in diesel can lead to the formation of acid rain, photochemical smog, carcinogens, etc., causing serious pollution to the environment and serious harm to the health of residents. Based on this, governments of various countries are paying more and more attention to air cleanliness, and have stricter requirements on vehicle diesel specifications. In the future, clean diesel specifications are...