Self-heating coating type low-temperature denitration catalyst and preparation method thereof

A low-temperature denitration and catalyst technology, applied in the field of denitration catalysts, can solve the problems of consuming a large heat source and increasing production costs, and achieve the effects of reducing regeneration costs, stable structure, and excellent ultra-low temperature catalytic performance.

Pending Publication Date: 2020-05-12
ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the following problems in the prior art: in the prior art, after the low-temperature denitrification catalyst ammonium bisulfate is poisoned and deactivated, it can only be regenerated by heating the flue gas, and frequent pyrolysis requires a large amount of heat sources, increasing production cost, therefore, generally poisoned catalysts cannot be regenerated

Method used

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  • Self-heating coating type low-temperature denitration catalyst and preparation method thereof
  • Self-heating coating type low-temperature denitration catalyst and preparation method thereof
  • Self-heating coating type low-temperature denitration catalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0066] (1) Surface treatment of electrothermal metal alloys

[0067] Place the electrothermal metal alloy substrate in 5% NaOH solution and soak for 5 minutes, take it out and rinse it with deionized water, then soak it in 5% nitric acid solution for 3 minutes, take it out and rinse it with deionized water;

[0068] (2)Al 2 o 3 Preparation of transition coating

[0069] Put the electrothermal metal alloy treated in step (1) into a mixture containing 0.204mg / L polyacrylic acid, 0.06g / L aluminum isopropoxide, 40.0g / Lγ-Al 2 o 3 Powder and 4.0g / L aluminum powder were electrodeposited in an anhydrous ethanol electrodeposition solution, the electrodeposition voltage was 20V, and after drying, they were kept at a high temperature of 800°C for 2h.

[0070] (3) Preparation of catalyst coating slurry

[0071] (a1) Carrier precursor sol configuration

[0072] Weigh 4.615g of titanyl sulfate and 0.687g of citric acid and add it to 13.845g of deionized, dissolve and bake in an oven a...

Embodiment 2

[0086] (1) Surface treatment of electrothermal metal alloys

[0087] Place the electrothermal metal alloy substrate in 5% NaOH solution and soak for 5 minutes, take it out and rinse it with deionized water, then soak it in 5% nitric acid solution for 3 minutes, take it out and rinse it with deionized water;

[0088] (2)Al 2 o 3 Preparation of transition coating

[0089] Put the electrothermal metal alloy treated in step (1) into a mixture containing 61.044mg / L polyacrylic acid, 0.6g / L aluminum isopropoxide, 40.0g / Lγ-Al 2 o 3 Powder and 4.0g / L aluminum powder were electrodeposited in an anhydrous ethanol electrodeposition solution, the electrodeposition voltage was 20V, and after drying, they were kept at a high temperature of 800°C for 2h.

[0090] (3) Preparation of catalyst coating slurry

[0091] (a1) Carrier precursor sol configuration

[0092] Weigh 8.800g of titanyl sulfate and 1.312g of citric acid and add it to 26.400g of deionized, dissolve and bake in an oven at ...

Embodiment 3

[0106] (1) Surface treatment of electrothermal metal alloys

[0107] Place the electrothermal metal alloy substrate in 5% NaOH solution and soak for 5 minutes, take it out and rinse it with deionized water, then soak it in 5% nitric acid solution for 3 minutes, take it out and rinse it with deionized water;

[0108] (2)Al 2 o 3 Preparation of transition coating

[0109] Put the electrothermal metal alloy treated in step (1) into a mixture containing 15.008mg / L polyacrylic acid, 0.3g / L aluminum isopropoxide, 40.0g / Lγ-Al 2 o 3 Powder and 4.0g / L aluminum powder were electrodeposited in an anhydrous ethanol electrodeposition solution, the electrodeposition voltage was 20V, and after drying, they were kept at a high temperature of 800°C for 2 hours;

[0110] (3) Preparation of catalyst coating slurry

[0111] (a1) Carrier precursor sol configuration

[0112] Weigh 18.030g of titanyl sulfate and 2.406g of citric acid and add it to 54.090g of deionized, dissolve and bake in an ...

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Abstract

The invention discloses a self-heating coating type low-temperature denitration catalyst, and relates to the field of denitration catalysts. The self-heating coating type low-temperature denitration catalyst comprises a matrix and a catalyst coating, wherein the catalyst coating is arranged above the matrix, and the catalyst disclosed by the invention can be initially used as a normal low-temperature denitration catalyst, and can be subjected to electrifying self-heating online regeneration after ammonium bisulfate is inactivated. The invention further discloses a preparation method. Accordingto the preparation method disclosed by the invention, Al2O3 is deposited on the surface of an electrothermal metal alloy by utilizing an electro-deposition technology to form a transition layer film,the upper surface of the Al2O3 transition layer is coated with a catalyst slurry coating, and then roasting is carried out in an air atmosphere, so that the catalyst coating slurry is sintered on thesurface of the Al2O3 transition layer.

Description

technical field [0001] The invention relates to the field of denitration catalysts, in particular to a self-heating coating type low-temperature denitration catalyst and a preparation method thereof. Background technique [0002] Nitrogen oxides (NO x ) is one of the causes of pollution phenomena such as smog and acid rain, and has become the key object of air pollution control. With the implementation of the "Action Plan for the Prevention and Control of Air Pollution" and the implementation of strategic plans such as the Blue Sky Defense War, the emission standards of industrial smoke are becoming more and more stringent. Among them, the emission limits of nitrogen oxides in industries such as cement and steel sintering are getting lower and lower. At present, the mainstream industrial flue gas denitrification technology is selective catalytic reduction (SCR) denitrification technology, which has the advantages of high efficiency and good stability, and is widely used in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J23/889B01J37/06B01J37/34B01J37/02B01J37/03B01J37/08B01D53/86B01D53/56
CPCB01J23/34B01J23/8892B01J23/002B01J37/06B01J37/348B01J37/0215B01J37/036B01J37/08B01D53/8628B01D2258/0283B01J2523/00B01J2523/31B01J2523/3712B01J2523/47B01J2523/72B01J2523/842B01J2523/845B01J2523/17B01J2523/25
Inventor 潘有春王光应梁燕徐辉
Owner ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH
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