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Aluminum-zirconium composite oxides carrier and supported hydrodesulphurization catalyst

A composite oxide, hydrodesulfurization technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, catalyst supports, etc., can solve the problems of increasing the complexity of the preparation process and the cost of catalysts, etc. To achieve the effect of easy control, high hydrogenation activity, moderate specific surface and pore size

Active Publication Date: 2009-02-18
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, in order to obtain a carrier with a large specific surface area and a macroporous structure, many studies have proposed the use of templates to synthesize catalytic materials. Although this method can achieve the effect of increasing the specific surface area of ​​the carrier material and improving the pore structure, the use of organic particles The template also increases the complexity of the preparation process and the cost of the catalyst

Method used

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  • Aluminum-zirconium composite oxides carrier and supported hydrodesulphurization catalyst
  • Aluminum-zirconium composite oxides carrier and supported hydrodesulphurization catalyst
  • Aluminum-zirconium composite oxides carrier and supported hydrodesulphurization catalyst

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Experimental program
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Effect test

Embodiment 1

[0048] Weigh an appropriate amount of aluminum nitrate and zirconium oxychloride according to a certain ratio, add an appropriate amount of deionized water and stir to dissolve. A certain amount of urea was weighed, slowly added to the above solution, stirred and dissolved to obtain a clear solution, wherein the molar ratio of (aluminum nitrate + zirconium oxychloride): deionized water: urea was 1:100:2.25.

[0049] The obtained clear solution was transferred to a reaction kettle with a filling degree of 65%. The reaction kettle was put into an oven and reacted at a constant temperature of about 140° C. for about 4 hours. The reaction kettle was taken out and cooled to room temperature to obtain a precipitate.

[0050] The resulting precipitate is vacuum filtered, washed with deionized water for 3-4 times (until no chloride ion is detected with silver nitrate solution); then washed with absolute ethanol for 2-3 times; to obtain a filter cake, the filter cake Transfer to a beak...

Embodiment 2

[0061] Al was synthesized according to the method of Example 1 2 o 3 -ZrO 2 After the composite support, an equal volume of Ni-W metal components was co-impregnated on the composite support to prepare NiW / Al 2 o 3 -ZrO 2 hydrogenation catalyst. The loading of NiO in the catalyst was 3.5% of the total catalyst mass, WO 3 The loading amount of is 26% of the total catalyst mass. The preparation method is: the metal salts used are respectively nickel nitrate (Ni(NO 3 ) 2 ·6H 2 O) and ammonium metatungstate ((NH 4 ) 6 h 2 W 12 o 40 ·xH 2 O). Dissolve a certain amount of ammonium metatungstate and nickel nitrate in water to form a co-impregnation solution. NiW / Al obtained by co-impregnation method 2 o 3 -ZrO 2 The bimetallic catalyst precursor, after impregnating the metal active component, placed the catalyst precursor in an ultrasonic oscillator for 20 minutes of ultrasonic treatment, then dried at 110°C for 12 hours, and then calcined at 500°C in an air atmosph...

Embodiment 3

[0063] A certain amount of alumina powder is weighed and stirred with an appropriate amount of deionized water to form a uniform alumina slurry; wherein, in terms of molar weight, alumina powder: deionized water is: 1:15;

[0064] Dissolving zirconium oxychloride with deionized water is prepared into a zirconium salt aqueous solution with a concentration of 0.5 mol / L;

[0065] Slowly add the zirconium salt solution to the alumina slurry under stirring conditions, and stir evenly to form a mixed slurry;

[0066] Slowly add ammonia water with a concentration of 6 mol / L to the mixed slurry under stirring conditions, adjust the pH value to about 8, so that the zirconium salt is evenly deposited on the surface of the alumina, and a mixed precipitate is obtained;

[0067] Place the mixed precipitate in an ultrasonic oscillator for 20 minutes of sonication, and then age it at room temperature (not exceeding 32°C) for 4 hours;

[0068] The mixed precipitate after ultrasonic treatment...

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Abstract

The invention relates to an Al2O3-ZrO2 multiple oxide and a supported hydrodesulfurization catalyst obtained by taking the multiple oxide as a carrier. The specific surface of the multiple oxide is between 200 and 270 m<2> / g, the pore volume of the multiple oxide is between 0.2 and 0.5 cm<3> / g, and the pore diameter of the multiple oxide is between 4 and 9 nanometers. The multiple oxide carrier can be obtained through assembling and synthesizing aluminum source and zirconium source by the hydrothermal precipitation method, coating method and the like; and the multiple oxide has large specific surface, appropriate pore canal structure, optimal acid property and redox property, and can be taken as an ideal carrier of diesel hydrodesulfurization catalyst. The invention also provides a deep hydrodesulfurization catalyst obtained by taking the multiple oxide as the carrier, and the catalyst shows better hydrodesulfurization activity than the common catalyst when used in hydrodesulfurization treatment of petroleum products.

Description

technical field [0001] The present invention relates to a novel Al 2 o 3 -ZrO 2 Composite oxide, its preparation method, and a supported hydrogenation desulfurization 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 increasing, causing serious air pollution problems; 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 aromatic...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J23/883B01J23/888C10G45/08
Inventor 段爱军张登前万国赋姜桂元赵震
Owner BC P INC CHINA NAT PETROLEUM CORP
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