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Preparation method of catalyst for catalytic combustion of volatile organic compounds

A technology of organic compounds and catalytic combustion, which is applied in the direction of combustion methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., and can solve problems such as poor stability, low anti-poisoning ability, and low ignition temperature. problems, achieve stable activity, large specific surface area, and overcome the effect of easy sintering

Active Publication Date: 2013-11-13
JIANGSU ANQIER WASTE GAS PURIFICATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of the catalysts currently used in this method are catalysts loaded with noble metals. The noble metal catalysts have low light-off temperature and high activity, but their stability is generally poor and their anti-poisoning ability is low.

Method used

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  • Preparation method of catalyst for catalytic combustion of volatile organic compounds
  • Preparation method of catalyst for catalytic combustion of volatile organic compounds
  • Preparation method of catalyst for catalytic combustion of volatile organic compounds

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Mix 0.0643g ammonium metavanadate and 0.0252g Ce(NO 3 ) 3 ·6H 2 O was dissolved in 40mL of 1mol / L oxalic acid solution and stirred until completely dissolved.

[0025] (2) Add 1gTiO 2 The powder is dissolved in the solution obtained in (1), stirred at room temperature for 8 hours, filtered and washed 3 times, dried at 70°C for 12 hours, and the powder obtained after grinding is calcined at 500°C for 3 hours to obtain 1% CeO 2 / 5%V 2 o 5 -TiO 2 powder.

[0026] (3) Take 1g of (2) obtained 1%CeO 2 / 5%V 2 o 5 -TiO 2 Powder, dissolved in 40mL deionized water, added 0.5mL tetraammineplatinum nitrate solution (10mg Pt / mL) and stirred for 18h, washed with deionized water for 3 times, the obtained precipitate was dried at 110°C for 10h, then calcined at 400°C for 5h, 0.5%Pt / 1%CeO after grinding 2 / 5%V 2 o 5 -TiO 2 powder.

[0027] Characterized by TEM, the prepared 1%CeO 2 / 5%V 2 o 5 -TiO 2 The powder particle size is between 10~20nm, see figu...

Embodiment 2

[0030] (1) Mix 0.1029g ammonium metavanadate and 0.0126g Ce(NO 3 ) 3 ·6H 2 O was dissolved in 40mL of 1mol / L oxalic acid solution and stirred until completely dissolved.

[0031] (2) Add 1gTiO 2 The powder is dissolved in the solution obtained in (1), stirred at room temperature for 10 hours, dried at 80°C for 10 hours, and the powder obtained after grinding is calcined at 500°C for 3 hours to obtain 1% CeO 2 / 8%V 2 o 5 -TiO 2 powder.

[0032] (3) Take 1g of (2) obtained 1%CeO 2 / 8%V2 o 5 -TiO 2 Powder, dissolved in 40mL deionized water, added 0.5mL tetraammineplatinum nitrate solution (10mg Pt / mL) and stirred for 24h, washed with deionized water for 3 times, the obtained precipitate was dried at 100°C for 12h, then calcined at 400°C for 5h, 0.1%Pt / 1%CeO after grinding 2 / 8%V 2 o 5 -TiO 2 powder.

[0033] Characterized by TEM, the as-prepared 0.1%Pt / 1%CeO 2 / 8%V 2 o 5 -TiO 2 The particle size of powder is between 15~25nm. The specific surface are...

Embodiment 3

[0036] (1) Mix 0.0257g ammonium metavanadate and 0.0066g La(NO 3 ) 3 ·6H 2 O was dissolved in 40mL of 1mol / L oxalic acid solution and stirred until completely dissolved.

[0037] (2) Add 1gTiO 2 The powder is dissolved in the solution obtained in (1), stirred at room temperature for 12 hours, dried at 60°C for 14 hours, and the powder obtained after grinding is calcined at 500°C for 3 hours to obtain 0.5% La 2 o 3 / 2%V 2 o 5 -TiO 2 powder.

[0038] (3) Take 1g of (2) to get 0.5% La 2 o 3 / 2%V 2 o 5 -TiO 2 Powder, dissolved in 40mL deionized water, added 0.1mL tetraammineplatinum nitrate solution (10mg Pt / mL) and stirred for 20h, washed with deionized water for 3 times, the obtained precipitate was dried at 120°C for 8h, then calcined at 400°C for 5h, 0.1Pt / 0.5%La after grinding 2 o 3 / 2%V 2 o 5 -TiO 2 powder.

[0039] Characterized by TEM, the prepared 0.1Pt / 0.5%La 2 o 3 / 2%V 2 o 5 -TiO 2 The particle size is between 10 and 20nm, and the specific s...

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Abstract

The invention relates to a preparation method of a catalyst for catalytic combustion of VOCs (volatile organic compounds). The preparation method comprises the following steps of: dissolving a vanadium-containing compound and a lanthanide-series compound in an oxalic acid solution and stirring till the compounds are complete dissolved; dissolving TiO2 powder in the solution, stirring at normal temperature, filtering, washing, drying, grinding to obtain powder, and calcining the powder for 3 hours at the temperature of 500 DEG C, thus obtaining MOx / V2O5-TiO2 powder; mixing and stirring the MOx / V2O5-TiO2 powder and a platinum-containing compound solution, drying sediment, and calcining the sediment for 5 hours at the temperature of 400 DEG C, thus obtaining the catalyst Pt / MOx / V2O5-TiO2. The catalyst prepared by the method provides a large specific surface area and has a very high catalytic activity to the catalytic combustion reaction of benzene series materials such as benzene; in addition, raw materials for preparation are easy to obtain and the technology is simple; the catalyst can be used repeatedly with stable activity, and the defects that the traditional noble metal catalyst is sintered easily and causes intoxication easily are overcome. The catalyst can also be used for eliminating other volatile organic compounds such as halogenated hydrocarbon, ketone and ester from industrial waste gas in a catalytic combustion manner.

Description

technical field [0001] The invention relates to a method for preparing a volatile organic compound catalytic combustion catalyst, belonging to the technical field of chemical catalysts and their preparation. Background technique [0002] Volatile Organic Compounds (Volatile Organic Compounds, VOCs), according to the definition of the World Health Organization, are compounds with a boiling point between 50°C and 250°C. The saturated vapor pressure at room temperature exceeds 133.32Pa, and they exist in the air in the form of vapor at room temperature. organic matter. The main components of VOCs are: hydrocarbons, halogenated hydrocarbons, oxygen hydrocarbons and nitrogen hydrocarbons, which include: benzene series, organic chlorides, Freon series, organic ketones, amines, alcohols, ethers, esters, acids and petroleum hydrocarbon compounds Wait. The sources of VOCs are mainly industrial waste gas from fuel combustion and transportation, vehicle exhaust, photochemical polluti...

Claims

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Application Information

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IPC IPC(8): B01J23/648F23G7/07
Inventor 赵伟荣曾婉昀
Owner JIANGSU ANQIER WASTE GAS PURIFICATION
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