Presulfided sulfur-tolerant shift catalyst and preparation method

Abstract

The invention relates to a presulfided sulfur-tolerant shift catalyst and a preparation method, belonging to the technical field of presulfurization treatment of sulfur-tolerant shift catalysts. The presulfided sulfur-tolerant shift catalyst prepared by using the method in the invention comprises an active component which is a binary component of a cobalt-contained compound and a molybdenum-contained compound, and carrier raw materials which are a magnesium-contained powdery compound, an aluminum-contained powdery compound, a titanium-contained powdery compound, and an external surface wrappage material composed of a macromolecular compound. The preparation method for the presulfided sulfur-tolerant shift catalyst provided by the invention comprises the following steps: preparation of an active component solution, molding of the catalyst, drying, roasting, presulfurization treatment, and aftertreatment of the catalyst. The presulfided sulfur-tolerant shift catalyst prepared by using the method in the invention is easy to activate when in use, has short activation time and high shift activity, and is convenient for transportation and storage; and the preparation method for the presulfided sulfur-tolerant shift catalyst provided by the invention is simple in process and facilitates realization of industrialization.

Description

technical field [0001] The invention relates to a presulfurized sulfur-resistant shift catalyst and a preparation method thereof, belonging to the technical field of presulfurization treatment of sulfur-tolerant shift catalysts. Background technique [0002] Cobalt-molybdenum-based sulfur-tolerant shift catalysts are mainly used to meet the needs of producing raw material gas from heavy raw materials such as residual oil, heavy oil, petroleum coke, and coal. They must be sulfurized when used to convert the active components in the oxidized state into sulfurized state, in order to have transformation activity. At present, most domestic sulfur-tolerant shift catalysts adopt in-vehicle presulfidation treatment. This technology has obvious disadvantages: (a) it is easy to cause catalyst bed overheating, resulting in temporary or permanent loss of catalyst activity; (b) it is easy to cause incomplete catalyst vulcanization , affecting its activity. The external pre-vulcanizatio...

AI Technical Summary

Problems solved by technology

At present, most domestic sulfur-tolerant shift catalysts adopt in-vehicle pre-sulfurization treatment. This technology has obvious disadvantages: (a) it is easy to cause catalyst bed overheating, resulting in temporary or permanent loss of catalyst activity; (b) it is easy to cause incomplete catalyst vulcanization , affecting its activity

However, the protective film formed by this method is not uniform enough, and the passivation effect is poor.

[0004] For the pre-sulfurization technology outside the device, only preliminary research has been carried out in China, and there are still many difficulties in realizing industrialization, and these pre-sulfurization methods require the establishment of special devices, and the investment in equipment is relatively large.

Images