Aluminum-silicon-titanium composite oxide carrier and load type catalytic hydro-dearomatization catalyst

Abstract

The present invention relates to a composite Al2O3-SiO2-TiO2 oxide and a loading type hydrogenation-dearomatization catalyst which is obtained with the composite oxide as a support. The composite oxide support is the composite Al2O3-SiO2-TiO2 oxide which is obtained by assembling and synthesizing an aluminium source, a silicon source and a titanium source by a sol-gel method, the specific surface area of the composite Al2O3-SiO2-TiO2 oxide is 250 to 400m<2> / g, the pore volume is 0.4 to 0.6cm<3> / g, and the aperture is 4 to 10nm. The composite oxide is used as the support to load noble metal and becomes deep hydrogenation-dearomatization catalyst to be used for the hydrogenation-dearomatization treatment of oil, and particularly, the composite oxide shows the stability and the dearomatization activity better than the normal catalyst in the deep hydrogenation-dearomatization reaction of diesel oil.

Description

technical field [0001] The present invention relates to an Al 2 o 3 -SiO 2 -TiO 2 Composite oxide and a supported hydrogenation dearomatization catalyst obtained by using the composite oxide as a carrier. The invention belongs to the technical field of catalysts. Background technique [0002] As the total demand for vehicle fuel increases day by day, the emission of pollutants in vehicle exhaust is also increasing, causing air pollution problems to become more and more serious; at the same time, people's awareness of environmental protection is becoming stronger and stronger . Therefore, the market has increasingly stringent requirements on the quality of petroleum products, and countries all over the world have successively revised strict fuel standards. In the new specification, more stringent requirements are put forward for the sulfur content, aromatic content, density and cetane number of diesel products, especially the stricter requirements for sulfur content and...

AI Technical Summary

Problems solved by technology

[0006] In order to obtain a carrier with a large specific surface area and a macroporous structure, many studies have proposed the use of templates. Although the specific surface area and pore structure of the carrier material can be increased, the use of organic particle templates also increases the preparation process. complexity and catalyst cost

In current applications, conventional diesel hydrodearomatization catalysts are based on Al with a large specific surface area 2 o 3 Or molecular sieve is the main catalyst of supporting PtPd. Although it has good dearomatization effect, its stability performance is still very poor, which cannot meet the requirements of long cycle life of catalyst in industrial production; and Al 2 o 3 Or although the catalyst supported by NiW on a molecular sieve also has a certain dearomatization effect, the effect is not ideal, especially it is difficult to remove bicyclic or polycyclic aromatic hydrocarbons, which is one of the main reasons why it is difficult to achieve deep dearomatization.

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