Hydrocarbon reforming catalyst with modified SBA-15 molecular sieve as well as preparation method and application of hydrocarbon reforming catalyst

Abstract

The invention relates to a reforming catalyst as well as a preparation method and application thereof. The reforming catalyst is prepared from a mixed carrier and active components, wherein the mixedcarrier is prepared from a sulfate-modified SBA-15 molecular sieve and aluminum oxide according to the mass ratio being (1-10):(1-60); the active components consist of platinum family metal, VII B metal and halogen; calculated by dry basis of the mixed carrier, the active components consist of 0.1 to 5.0 weight percent of the platinum family metal, 0.1 to 4.0 weight percent of the VII B metal and0.5 to 6.0 weight percent of the halogen. The catalyst is suitable for catalytic reforming reaction of hydrocarbons such as naphtha and has higher aromatic selectivity and aromatic yield; carbon deposition resistance and stability of the catalyst are improved; in addition, the preparation method is simple and convenient to operate.

Description

technical field [0001] The invention relates to a reforming catalyst, in particular to a reforming catalyst containing modified SBA-15 molecular sieve and its preparation method and application. Background technique [0002] Catalytic reforming is the process of converting naphtha into reformed gasoline rich in aromatics and producing hydrogen by-product under the conditions of certain temperature, pressure, presence of hydrogen and presence of catalyst. Naphtha can be converted into aromatic-rich products through catalytic reforming, which can be used to blend high-octane gasoline or obtain basic chemical raw materials such as benzene, toluene, and xylene through separation and purification. Hydrogen is an important source of hydrogenation in refineries. raw material, while reforming by-product hydrogen is a cheap source of hydrogen. The key to determining the economic benefit in the catalytic reforming process lies in the high-performance reforming catalyst. At present, ...

AI Technical Summary

Problems solved by technology

[0004] CN105498824A discloses a hydrocarbon reforming catalyst containing mesoporous molecular sieves (SBA-15, MCM-41, MCM-48), comprising a molecular sieve catalyst with a mass ratio of 1 to 5:1 to 30 and an oxidation catalyst whose carrier is alumina Aluminum catalyst, and then separately impregnated with active metals to prepare reforming catalyst, the catalyst has a high yield of aromatics, but the catalyst has poor carbon deposition resistance and sulfur resistance

However, the pores of the sulfate modified alumina catalyst are irregular, the anti-coking ability is limited, and the interaction between the sulfate and the carrier is strong, and the utilization rate is low.

Images