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Monolithic catalyst for catalytic combustion of propane, and preparation method thereof

A monolithic catalyst and catalytic combustion technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as narrow application range, achieve low cost, The effect of simple process and cost reduction

Active Publication Date: 2015-10-14
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this monolithic catalyst preparation method has a narrow application range, mainly for the preparation of noble metal catalysts
For other metal-doped modified oxide catalysts, it is difficult to use this method to achieve the desired effect.

Method used

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  • Monolithic catalyst for catalytic combustion of propane, and preparation method thereof
  • Monolithic catalyst for catalytic combustion of propane, and preparation method thereof
  • Monolithic catalyst for catalytic combustion of propane, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Prepare 0.5mol / L sodium carbonate and cobalt nitrate aqueous solutions respectively, and add 0.5mol / L sodium carbonate solution dropwise to 0.5mol / L cobalt nitrate aqueous solution under the condition of stirring at 50°C, and continue stirring for 0.5h The precipitate was filtered and washed, dried at 50°C for 12 hours, ground into powder, calcined at 300°C for 2 hours, and the catalyst was passed through a 100-mesh sieve as an active component for future use.

Embodiment 2

[0024] Weigh 0.25g of the cobalt tetroxide powder catalyst prepared in Example 1 and add it to 18g of deionized water, ultrasonically disperse it for 10-15 minutes and then add 10.25g of γ-Al 2 o 3 Continue ultrasonic dispersion for 10-15 minutes, place the dispersed suspension on a magnetic stirrer and add 1.5g pseudo-boehmite while stirring, add 1mol / L nitric acid aqueous solution to adjust the pH to 3-4, and continue stirring for 0.5h -1h; under vacuum conditions, the slurry was coated on the cordierite honeycomb ceramic carrier (diameter 6.25mm × height 50mm, volume 1.5mL) after ultrasonic cleaning; Roast 4h in ℃ of air, make fresh catalyst 1#; Slurry solid content, catalyst coating rate and its use in propane catalytic oxidation activity (T 50 , the reaction temperature when the conversion rate is 50%; T 90 , the reaction temperature when the conversion rate is 90%) are shown in Table 1, Table 2 and Table 3 respectively.

Embodiment 3

[0026] Weigh 0.5g of the cobalt tetroxide powder catalyst prepared in Example 1 and add it to 18g of deionized water, ultrasonically disperse it for 10-15 minutes and then add 10g of γ-Al 2 o 3 Continue ultrasonic dispersion for 10-15 minutes, and other preparation processes are the same as in Example 2 to obtain catalyst 2#. See Table 1, Table 2 and Table 3 for the solid content of slurry, catalyst coating rate and its catalytic activity for propane oxidation.

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Abstract

The invention relates to a monolithic catalyst for catalytic combustion of propane, wherein a coating slurry prepared from an active component, a co-catalyst, pseudo bohemite and gamma-Al2O3 is coated on a monolithic carrier and then high-temperature calcination is performed to form the monolithic catalyst, the monolithic carrier is a cordierite honeycomb ceramic, the active component of the catalyst is Co3O4, and the co-catalyst is one or a plurality of materials selected from ZrO2, CeO2 and La2O3. According to the present invention, the catalyst is mainly used for the catalytic combustion of low-carbon chain alkanes, has characteristics of high thermal stability, low price and simple process, and is suitable for application in industrial production; and according to the preparation method, the Co3O4 powder catalyst is used to prepare the monolithic catalyst, such that the generation of the inert component CoAl2O4 is reduced, the reproduction of the activity of the powder catalyst is ensured, and a certain reference is provided for the preparation of the catalysts.

Description

technical field [0001] The invention relates to a propane catalytic combustion monolithic catalyst and a preparation method thereof, which is characterized in that the monolithic catalyst is prepared by using tricobalt tetroxide powder catalyst as an active component and rare earth metal as a cocatalyst, on the one hand avoiding the use of precious metals and reducing the cost of the catalyst, On the other hand Co 3 o 4 Oxide is introduced into the slurry as an active component avoiding the inert component CoAl 2 o 4 The formation of the catalyst improves its catalytic oxidation activity. In addition, the method has a simple process and is suitable for application in industrial production. technical background [0002] Low-carbon paraffins, as a category of V°C, are commonly found in waste gases emitted by industrial production in petrochemical, pharmaceutical, printing, painting and other industries. In addition, with the rapid development of urban construction and tra...

Claims

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Application Information

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IPC IPC(8): B01J23/83B01J23/75
Inventor 何丹农蔡婷赵昆峰高振源杨玲袁静张涛金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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