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Sulfur-resistant catalytic combustion catalyst and preparation method thereof

A catalytic combustion and catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. Catalytic combustion treatment effect of exhaust gas, no sulfur tolerance and other problems, to achieve the effect of easy operation and industrial production, simple manufacturing process and equipment, and preventing the loss of active components

Active Publication Date: 2013-06-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalytic combustion catalyst mentioned above can be adapted to the catalytic combustion of various low-concentration organic waste gases, but the disadvantage is that the catalyst has no tolerance to sulfur and cannot adapt to the catalytic combustion treatment of sulfur-containing organic waste gases
[0004] At present, most of the catalytic combustion catalysts for organic waste gas use noble metals as active components. Catalytic combustion catalysts with noble metals as active components have the advantages of high activity and high removal rates for ordinary organic waste gases. However, when there is a certain amount of sulfide in the waste gas , the noble metal active components of the catalyst are easily deactivated by the interaction of sulfides, thereby reducing or even losing the catalytic combustion treatment effect of organic waste gas

Method used

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  • Sulfur-resistant catalytic combustion catalyst and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] With distilled water as solvent, add appropriate amount of Al 2 o 3 Powder, Nano TiO 2 Powder, CeO 2 Powder, La 2 o 3 The powder and copper nitrate are ground into a slurry evenly distributed with water for subsequent use, so that the prepared catalyst contains active Al in the coating according to the total weight of the coating. 2 o 3 61%, TiO 2 25%, CeO 2 8.3%, La 2 o 3 2.3%, CuO3.4%.

[0019] Soak the honeycomb ceramic carrier with a size of 100mm×100mm×50mm in dilute hydrochloric acid with a mass concentration of 1% for 2 hours, wash the carrier and the dilute acid liquid under microwave for 2 hours, take it out and blow dry, and place it in a refrigerator at 100°C. After 6 hours in an oven, the obtained carrier was fired for 5 hours to obtain a clean and dry honeycomb ceramic carrier for use.

[0020] Put the dry carrier in the slurry for 25 minutes, take it out, blow out the slurry in the channels with compressed air, dry at 100°C for 6 hours, and bake...

Embodiment 2

[0022] With distilled water as solvent, add appropriate amount of Al 2 o 3 powder, TiO 2 Powder, CeO 2 Powder, La 2 o 3 Powder, copper nitrate and manganese nitrate are ground into a slurry evenly distributed with water for subsequent use, so that in the prepared catalyst, according to the total weight of the coating, the coating contains Al 2 o 3 70%, TiO 2 17%, CeO 2 5.6%, La 2 o 3 1.8%, CuO3.2%, MnO 2 2.4%.

[0023] Soak the honeycomb ceramic carrier with a size of 100mm×100mm×50mm in dilute hydrochloric acid with a mass concentration of 1% for 2 hours, wash the carrier and the dilute acid liquid under microwave for 2 hours, take it out and blow dry, and place it in a refrigerator at 120°C. After 4 hours in an oven, the obtained carrier was fired for 5 hours to obtain a clean and dry honeycomb ceramic carrier for use.

[0024] Put the dry carrier in the slurry for 25 minutes, take it out, blow out the slurry in the channels with compressed air, dry at 120° C. fo...

Embodiment 3

[0026] With distilled water as solvent, add appropriate amount of Al2 o 3 Powder, Nano TiO 2 Powder, CeO 2 Powder, La 2 o 3 Powder, copper nitrate, manganese nitrate, iron nitrate and nickel nitrate are ground into a slurry evenly distributed with water for subsequent use, so that the prepared catalyst contains active Al in the coating according to the total weight of the coating 2 o 3 70%, TiO 2 11%, CeO 2 11%, La 2 o 3 2%, CuO2%, MnO 2 2%, Fe 2 o 3 1.2%, NiO 0.8%.

[0027] Soak the honeycomb ceramic carrier with a size of 100mm×100mm×50mm in dilute hydrochloric acid with a mass concentration of 1% for 2 hours, wash the carrier and the dilute acid liquid under microwave for 2 hours, take it out and blow dry, and place it in a refrigerator at 100°C. After 6 hours in an oven, the obtained carrier was fired for 5 hours to obtain a clean and dry honeycomb ceramic carrier for use.

[0028] Put the dry carrier in the slurry for 40 minutes, take it out, blow out the slu...

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Abstract

The invention discloses a sulfur-resistant catalytic combustion catalyst and a preparation method thereof. The catalytic combustion catalyst adopts honeycomb ceramic as a carrier, the surface of the honeycomb ceramic carrier is provided with coating, whereinich by metering according to the total weight, the coating contains 40 to 85 percent by weight of active Al2O3, 5 to 50 percent by weight of TiO2, 5 to 15 percent by weight of CeO2, 2 to 10 percent by weight of La2O3 and 3 to 15 percent by weight of one or more of CuO, MnO2, NiO and Fe2O3, the coating is loaded with precious metal active components Pt or Pt and Pd, the molar ratio of Pt to Pd is 1:1 to 3:1, and the amount of the loaded precious metal active components is 0.2g to 3.5g per liter of the catalyst. The preparation method for the catalytic combustion catalyst includes a coating slurry preparation process, a carrier-preprocessing process and a carrier-coating and precious metal active component-loading process. The catalyst has high activity and stability in the process of catalytic combustion for treating sulfurous organic flue gas, the preparation method is simple, and the catalyst is suitable for industrial application.

Description

technical field [0001] The invention belongs to the field of sulfur-containing organic waste gas purification, and in particular relates to a sulfur-resistant catalytic combustion catalyst and a preparation method thereof. Background technique [0002] With the rapid development of the industrial sector, many enterprises emit a large amount of organic waste gas, especially in the petroleum refining industry and the electronics, printing, coating, and paint processing industries. A large amount of organic waste gas has seriously affected people's normal life, endangered human health, and has serious harm to human eyes, respiratory tract and nervous system. With the improvement of people's living standards, the requirements for the living environment are getting higher and higher, and the effective treatment of this type of gas has attracted widespread attention. The catalytic combustion method has the characteristics of high efficiency and low temperature for the treatment o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89B01D53/86B01D53/72
Inventor 刘新友陈玉香王学海
Owner CHINA PETROLEUM & CHEM CORP