Precure sulfur-tolerant shift conversion catalyst and preparation method thereof

Abstract

The invention relates to a catalyst and a preparation method thereof, in particular to a precure sulfur-tolerant shift conversion catalyst and a preparation method thereof. A binary component containing VIB-family elements and VIII-family metallic elements serves as an active component, and magnesium oxide, aluminium oxide and compounds of the magnesium oxide and the aluminium oxide serve as carriers. The catalyst has high strength and good stability. The invention further provides the preparation method of the precure sulfur-tolerant shift conversion catalyst. According to the preparation method, a vulcanizing agent including sulfur and the active component form a complex compound, meanwhile, the complex compound is added into the catalyst in a solution mode, and active component sulfide is generated in the subsequent catalyst preparation process, so that the vulcanizing time before the catalyst is used is greatly shortened; the sulfur content is high, and the active sulfide is dispersed evenly; and the precure sulfur-tolerant shift conversion catalyst can stably exist in air under normal temperature conditions, activation of the catalyst does not need to be conducted specially when the catalyst is used, transporting and storing are facilitated, and the precure sulfur-tolerant shift conversion catalyst has good economic benefits and application prospects.

Description

technical field [0001] The invention relates to a catalyst and a preparation method thereof, in particular to a presulfurized sulfur-resistant shift catalyst and a preparation method thereof. Background technique [0002] Sulfidation is a pretreatment process that cobalt-molybdenum-based sulfur-tolerant shift catalysts must undergo. Industrial application practice shows that only after the sulfuration treatment process converts the oxidized cobalt-molybdenum active components into a sulfurized state, can it have conversion activity, while The quality of the sulfur-resistant conversion catalyst sulfuration effect directly affects the performance of the catalyst. At present, the online presulfurization treatment method in the reactor is adopted for sulfur-tolerant shift catalysts. This method has obvious disadvantages: (1) It needs to be equipped with special presulfurization equipment and instruments; (2) The vulcanization time is long, which may affect the normal start-up pr...

AI Technical Summary

Problems solved by technology

At present, the online presulfurization treatment method in the reactor is adopted for sulfur-tolerant shift catalysts. This method has obvious disadvantages: (1) It needs to be equipped with special presulfurization equipment and instruments; (2) The vulcanization time is long, which may affect the normal start-up process (3) Catalyst bed overheating is likely to occur, resulting in loss of catalyst activity; (4) Vulcanizing agents are poisonous and harmful substances, which endanger the health of operators and pollute the environment; (5) easily cause incomplete catalyst vulcanization, affecting its activity

The advantage of this technology is that it is easier to prepare, store, transport and load the presulfided catalyst. However, since the catalyst still needs to be sulfided in the device, it cannot be called a real presulfided technology, and there is no large-scale industrial application.

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