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Vanadium-cerium oxide catalyst as well as preparation method and purpose thereof

A technology of cerium oxide and catalyst, which is applied in the field of vanadium cerium oxide catalyst, can solve the problems of poor poisoning performance, low catalytic activity, narrow operating temperature window, etc., and achieve wide operating temperature window, highly dispersed active components, good resistance Effect of sulfur poisoning properties

Inactive Publication Date: 2013-06-26
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalyst disclosed in this invention has low catalytic activity at low temperature, narrow operating temperature window, and is resistant to SO 2 Poor poisoning performance

Method used

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  • Vanadium-cerium oxide catalyst as well as preparation method and purpose thereof
  • Vanadium-cerium oxide catalyst as well as preparation method and purpose thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0083] A vanadium cerium oxide catalyst, the catalyst has the following chemical composition: V 2 o 5 / CeO 2 , the V 2 o 5 The mass percent of the vanadium cerium oxide catalyst is 3%.

[0084] The preparation method of described vanadium cerium oxide catalyst comprises the steps:

[0085] (1) Prepare cerium nitrate and ammonium metavanadate solution, mix cerium nitrate and ammonium metavanadate solution to obtain a mixed solution, control V 2 o 5 Accounting for the mass percent of the vanadium cerium oxide catalyst is 3%;

[0086] (2) Add excess urea precipitating agent to the mixed solution, the molar ratio of urea / (vanadium source + cerium source) is 10:1, and stir continuously for 12 hours under the condition of 90°C water bath to completely precipitate the vanadium and cerium ions, and the obtained The precipitated product was suction-filtered, washed, dried in an oven at 100°C for 12 hours, and then calcined in a muffle furnace at 500°C for 3 hours in an air atmos...

Embodiment 2

[0088] A vanadium cerium oxide catalyst, the catalyst has the following chemical composition: V 2 o 5 / CeO 2 , the V 2 o 5 The mass percent of the vanadium cerium oxide catalyst is 3%.

[0089] The preparation method of described vanadium cerium oxide catalyst comprises the steps:

[0090] (1) Prepare vanadium source solution in the presence of oxalic acid;

[0091] (2) Weigh CeO 2 Soaked in vanadium source solution, stirred at room temperature for 1 hour, evaporated to dryness by 60°C rotary evaporator, oven-dried at 100°C for 12 hours, and calcined in muffle furnace at 500°C for 3 hours in air atmosphere to obtain vanadium cerium oxide catalyst.

Embodiment 3

[0093] A vanadium cerium oxide catalyst, the catalyst has the following chemical composition: V 2 o 5 / CeO 2 , the V 2 o 5 The mass percent of the vanadium cerium oxide catalyst is 3%.

[0094] The preparation method of described vanadium cerium oxide catalyst comprises the steps:

[0095] (1) Dissolving the vanadium source in the oxalic acid solution;

[0096] (2) Weigh CeO 2 Immerse in the solution obtained in step (1), stir for 30 minutes, sonicate for 1 hour, oven dry at 100°C for 12 hours, and bake at 500°C for 3 hours in an air atmosphere in a muffle furnace;

[0097] (3) Repeat step (2) to get V 2 o 5 The mass percent of the vanadium-cerium oxide catalyst is 3% of the vanadium-cerium oxide catalyst.

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Abstract

The invention relates to a vanadium-cerium oxide catalyst. The catalyst consists of the following chemical components: V2O5 / CeO2, wherein the mass percentage of V2O5 in the vanadium-cerium oxide catalyst is 1%-10%. The invention further discloses a preparation method of the vanadium-cerium oxide catalyst. The vanadium-cerium oxide catalyst disclosed by the invention has NOx purification efficiency as high as 100% within 0-200 DEG C, has excellent SO2 intoxication resistance and can be operated within a wide temperature range.

Description

technical field [0001] The invention relates to a vanadium cerium oxide catalyst, a preparation method and application thereof. The catalyst is used for catalytic reduction of nitrogen oxides. Background technique [0002] Nitrogen oxides (NO x , including NO and NO 2 ) is one of the main air pollutants, it can cause acid rain, photochemical smog, form a higher ground ozone concentration, also participate in the formation of airborne dust (PM2.5), and also cause the destruction of the ozone layer and the greenhouse effect. . NO x The sources of energy can be divided into stationary sources and mobile sources: stationary sources mainly refer to the combustion of fuel in industrial boilers and coal-fired power plants; mobile sources mainly refer to exhaust emissions from motor vehicles. NO x Air pollution is a worldwide environmental problem, and its main impact on the atmosphere is NO x Emissions and atmospheric NO x The rapid increase in concentration will cause funda...

Claims

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Application Information

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IPC IPC(8): B01J23/22B01D53/86B01D53/56
CPCY02P20/30
Inventor 贺泓连志华刘福东石晓燕
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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