Naphtha reforming catalyst, and preparation method thereof

Abstract

The invention discloses a naphtha reforming catalyst, and a preparation method thereof. The naphtha reforming catalyst comprises, by mass, 93.0 to 99.9 parts of a carrier, 0.1 to 2.0 parts of a metal, 0 to 5.0 parts of carbon, wherein the mass amount of carbon is higher than 0. According to the preparation method, a certain amount of a monosaccharide is added in preparation process of the Pt-KL reforming catalyst, so that metal Pt dispersion is improved, carbon deposition rate of the catalyst in reaction process is reduced, and Pt-KL catalyst reforming reaction performance is improved; the naphtha reforming catalyst possesses relatively high paraffin aromatization reaction activity and reforming liquid yield; when active metal component Pt is introduced in the preparation method, a dipping liquid is alkaline, pH value is controlled to be 10 to 13, adsorption effect of Pt precursor ion with carrier KL molecular sieve is improved, so that it is beneficial for dispersion of metal Pt.

Description

Technical field [0001] The invention relates to a naphtha reforming catalyst and a preparation method thereof. Background technique [0002] With the rapid growth of my country’s car ownership, the consumption of motor gasoline has also increased substantially. The apparent consumption of motor gasoline has increased from 5.2475×10 in 2006. 7 t surged to 9.365×10 in 2013 7 t. On the other hand, the issue of environmental governance has become a global consensus. The impact of exhaust emissions on air pollution is increasing. The quality of oil is an important factor affecting exhaust emissions. The upgrading of refined oil quality is bound to become a long-term issue for the global oil refining industry. The development trend and accelerating the upgrading of oil quality is an important means to reduce exhaust emissions and prevent haze weather. [0003] At present, the quality of motor gasoline produced in China is still far behind the world fuel regulations and the new domestic ...

AI Technical Summary

Problems solved by technology

Although traditional catalytic reforming technology is widely used in the processing of crude naphtha, when it is used to process lean naphtha (such as FT naphtha), since lean naphtha is mainly composed of paraffins, and paraffin dehydrogenation Cyclization to aromatics is the slowest reaction on conventional naphtha reforming catalysts, making it difficult to convert to high-octane reformate without significant liquid yield loss, thus sparking criticism based on Pt / Cl - / Al 2 o 3 Research on Alternative Reforming Catalysts of Catalysts

[0006] The existing reforming catalysts mainly have the following problems: ① During the use of the reforming catalyst, the chlorine on the catalyst is constantly lost. In order to maintain the balance of water and chlorine, chlorine must be continuously injected during the production process. The complexity of the operation, and the free chlorine ions generated at the same time will also accelerate the corrosion of equipment and pollute downstream reformed products

② Traditional dual-functional reforming catalysts have low selectivity for aromatization of linear alkanes

An important factor affecting the industrialization of Pt / KL reforming is that the catalyst is easily deactivated due to carbon deposition and Pt aggregation growth, and the regeneration performance is poor

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