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Catalyst for eliminating volatile organic compound and preparation method thereof

A catalyst and coating technology, applied in the field of environmental catalytic materials for atmospheric environmental protection, can solve problems such as uncertain content of cerium-zirconium oxides, achieve high catalytic activity, high thermal stability, and eliminate volatile organic compounds

Active Publication Date: 2018-01-09
金华铂锐催化科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process of loading cerium-zirconium oxide is to heat and impregnate the nitrate solution of cerium and zirconium, and the adsorbed nitrate is precipitated and washed, thus resulting in the uncertainty of the content of cerium-zirconium oxide and the generation of nitrate-containing wastewater

Method used

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  • Catalyst for eliminating volatile organic compound and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] (1) The first coating: according to Nb 2 o 5 Measured Nb(OH) 5 , with Y 2 o 3 Measured Y(OH) 3 , with In 2 o 3 Measured In(NO 3 ) 3 ·5H 2 O and Zn(OH) as ZnO 2 , whose mass ratio is 30:45:5:20, respectively weigh Nb(OH) 5 150g, Y(OH) 3 225g, In(NO 3 ) 3 ·5H 2 O 25g and Zn(OH) 2 100g, add water until the total mass is 2500g, ball mill for 4 hours, then add concentrated nitric acid to adjust the acidity to pH=3.0. Cordierite honeycomb ceramic carrier (200 mesh / in 2 ) for impregnation, and blow out the excess slurry in the pores of the cordierite honeycomb ceramic carrier with high-pressure gas. It was then dried at 110°C and calcined at 400°C for 4 hours. The content of the first coating is 40 g / L calculated based on the coating mass after 4 hours of calcination at 400°C.

[0014] (2) Second coating: according to SnO 2 Measured Sn(OH) 4 , with In 2 o 3 Measured In(NO 3 ) 3 ·5H 2 O and Rh measured as Rh (NO 3 ) 3 , whose mass ratio is 92:7:1, re...

Embodiment 2

[0018] (1) First coating: The preparation method of the first coating is the same as that in Example 1.

[0019] (2) Second coating: according to SnO 2 Measured Sn(OH) 4 , with In 2 o 3 Measured In(NO 3 ) 3 ·5H 2 O and Rh measured as Rh (NO 3 ) 3 , whose mass ratio is 92:7:1, respectively weigh Sn(OH) 4 460g, In(NO 3 ) 3 ·5H 2O 35g and Rh(NO 3 ) 3 5g, add water until the total mass is 5kg, ball mill for 4 hours, then add concentrated nitric acid to adjust the acidity to pH=3.0. The cordierite honeycomb ceramic coated with the first coating is immersed in the above slurry, and the excess slurry in the pores of the cordierite honeycomb ceramic is blown out with high-pressure gas. It was then dried at 110°C and calcined at 400°C for 4 hours. The content of the second coating is 10 g / L calculated on the basis of the mass of the coating after baking at 400° C. for 4 hours.

[0020] (3) The third coating: the preparation method of the third coating is the same as tha...

Embodiment 3

[0023] (1) First coating: The preparation method of the first coating is the same as that in Example 1.

[0024] (2) Second coating: according to SnO 2 Measured Sn(OH) 4 , with In 2 o 3 Measured In(NO 3 ) 3 ·5H 2 O and Rh measured as Rh (NO 3 ) 3 , whose mass ratio is 92:7:1, respectively weigh Sn(OH) 4 460g, In(NO 3 ) 3 ·5H 2 O 35g and Rh(NO 3 ) 3 5g, add water until the total mass is 10kg, ball mill for 4 hours, then add concentrated nitric acid to adjust the acidity to pH=3.0. The cordierite honeycomb ceramic coated with the first coating is immersed in the above slurry, and the excess slurry in the pores of the cordierite honeycomb ceramic is blown out with high-pressure gas. It was then dried at 110°C and calcined at 400°C for 4 hours. The content of the second coating is 5 g / L calculated on the basis of the mass of the coating after sintering at 400° C. for 4 hours.

[0025] (3) The third coating: the preparation method of the third coating is the same as...

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Abstract

The invention discloses a catalyst for eliminating volatile organic compound and a preparation method thereof. The catalyst is prepared from a cordierite honeycomb ceramic carrier and three coating layers, wherein the first coating layer is prepared from Nb2O5, Y2O3, In2O3 and ZnO, a content of the first coating layer is calculated as 40g / L according to a mass of the coating layers which are roasted under 400 DEG C for 4 hours, and a mass ratio of the Nb2O5 to the Y2O3 to the In2O3 to the ZnO is 30 to 45 to 5 to 20; the second coating layer is prepared from SnO2, In2O3 and Rh, a content of thesecond coating layer is calculated as 5 to 20g / L according to the mass of the coating layers which are roasted under 400 DEG C for 4 hours, and a mass ratio of the SnO2 to the In2O3 to the Rh is 92 to 7 to 1; the third coating layer is prepared from Pt, a content of the third coating layer is calculated as 0.1 to 0.5g / L according to the mass of the coating layers which are roasted under 500 DEG Cfor 4 hours. The catalyst is prepared by three times of coating, and the catalyst has high catalytic activity and high thermal stability and can effectively eliminate the volatile organic compound.

Description

technical field [0001] The invention relates to a catalyst for eliminating volatile organic compounds and a preparation method thereof, belonging to the field of environmental catalytic materials for atmospheric environmental protection. Background technique [0002] Volatile organic compounds such as aromatics, oxygen-containing organic compounds (esters, alcohols, acids, ketones, aldehydes, etc.), alkanes, olefins, etc. (referred to as VOCs). Volatile organic compounds are one of the main harmful substances that cause air pollution, and are also the main source of photochemical pollution and the formation of fine particulate matter (PM2.5), which leads to abnormalities in the human central nervous system, respiratory system, immune system, and reproductive system (J.J. Spivey, Ind.Eng.ChemRes 1987,26:2165-2180), causing acute and chronic poisoning, carcinogenicity and gene mutation. [0003] Catalytic combustion is currently the most widely used technology for purifying ...

Claims

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Application Information

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IPC IPC(8): B01J23/648B01D53/86B01D53/72
CPCY02A50/20
Inventor 金凌云罗声宏
Owner 金华铂锐催化科技有限公司