Vanadium manganese composite catalyst for removing nitrogen oxide in incineration gas and preparation method thereof

A composite catalyst, nitrogen oxide technology, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., to achieve a wide reaction temperature range, reduce reaction temperature, increase ratio The effect of surface area

Inactive Publication Date: 2011-02-16
浙江德纳希环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But MnO X show mutual inhibition with vanadium-based catalysts

Method used

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  • Vanadium manganese composite catalyst for removing nitrogen oxide in incineration gas and preparation method thereof
  • Vanadium manganese composite catalyst for removing nitrogen oxide in incineration gas and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: adopt solvothermal method

[0035]7 g of carbon nanotubes were added to 500 ml of absolute ethanol and 50 ml of nitric acid, and ultrasonically oscillated for 1 h to obtain a solution A. Add 350ml of tetrabutyl titanate into 700ml of absolute ethanol under the condition of ultrasonic oscillation, and shake for 1 hour to obtain solution B. Add 1 g of manganese acetate to 5 ml of acetic acid and 50 ml of absolute ethanol, shake for 1 h to obtain solution C. Add 0.6g of ammonium metavanadate and 1.2g of oxalic acid into 50ml of absolute ethanol, shake for 1h to obtain D solution. Mix solution C and solution D, slowly add it to solution B, then add it to solution A, shake it for 1-2 hours, put it into the reaction kettle, keep it at 230°C for 2 hours, cool it to room temperature, filter it with Wash with deionized water until neutral, dry and grind to obtain the catalyst. The phase composition of the catalyst see figure 1 , titanium dioxide exists in the a...

Embodiment 2

[0037] Embodiment 2: adopt solvothermal method

[0038] 7 g of carbon nanotubes were added to 500 ml of absolute ethanol and 50 ml of nitric acid, and ultrasonically oscillated for 1 h to obtain a solution A. Add 350ml of tetrabutyl titanate into 700ml of absolute ethanol under the condition of ultrasonic oscillation, and shake for 1 hour to obtain solution B. Add 10 g of manganese acetate to 50 ml of acetic acid and 50 ml of absolute ethanol, shake for 1 h to obtain solution C. Add 6g of ammonium metavanadate and 12g of oxalic acid into 50ml of absolute ethanol, shake for 1h to obtain D solution. Mix solution C and solution D, slowly add it to solution B, then add it to solution A, shake it for 1-2 hours, put it into the reaction kettle, keep it at 230°C for 2 hours, cool it to room temperature, filter it with Wash with deionized water until neutral, dry and grind to obtain the catalyst.

[0039] The obtained catalyst was mixed with 20% bentonite, added a small amount of w...

Embodiment 3

[0040] Embodiment 3: adopt solvothermal method

[0041] 7 g of carbon nanotubes were added to 500 ml of absolute ethanol and 50 ml of nitric acid, and ultrasonically oscillated for 1 h to obtain a solution A. Add 350ml of tetrabutyl titanate into 700ml of absolute ethanol under the condition of ultrasonic oscillation, and shake for 1 hour to obtain solution B. Add 20g of manganese acetate to 100ml of acetic acid and 50ml of absolute ethanol, shake for 1h to obtain C solution. Add 12g of ammonium metavanadate and 24g of oxalic acid into 50ml of absolute ethanol, shake for 1h to obtain D solution. Mix solution C and solution D, slowly add it to solution B, then add it to solution A, shake it for 1-2 hours, put it into the reaction kettle, keep it at 230°C for 2 hours, cool it to room temperature, filter it with Wash with deionized water until neutral, dry and grind to obtain the catalyst.

[0042] The obtained catalyst was mixed with 20% bentonite, added a small amount of wat...

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Abstract

The invention discloses a vanadium manganese composite catalyst for removing nitrogen oxide in incineration gas, which is characterized in that a carbon nano tube and titanium dioxide are taken as composite carriers, and an MnOx and V2O5 composite component is taken as an active ingredient; the atomic ratio of V to Mn of the active components in the catalyst is equal to 1-5; the vanadium manganese composite catalyst comprises the following components by mass percent: 1-20% of active component and 5-10% of carbon nano tube and the balance titanium dioxide. The catalyst can be prepared by a solvothermal method, a sol-gel method and a coprecipitation method; in the catalyst, CNTs and TiO2 are taken as carriers at the same time, thus greatly increasing the specific surface area of the catalyst, and lowering the reaction temperature; and in the catalyst, the mixture of the MOx and V2O5 is taken as an active component, so that the catalyst has wider reaction temperature range, the catalyzing efficiency is gradually increased along with the rising of the temperature, and the rate of removal of NOX can reach 97% at the temperature of 250 DEG C. The catalyst can be widely used for removing the nitrogen oxides discharged by coal fired power plant, waste incineration, metallurgical industries and vehicle exhaust and the like.

Description

technical field [0001] The invention relates to a catalyst capable of removing nitrogen oxides (NOx) discharged from automobile tail gas, coal-fired power plants, metallurgical industry, waste incineration and other processes and a preparation method. Background technique [0002] The hazards of NOx began to be reported in the 1940s, and NOx was officially recognized as one of the main air pollutants in the 1960s. Commonly referred to as NOx includes NO and NO 2 etc., where NO accounts for 95% of typical coal-fired flue gas NOx, and the rest is NO 2 . NO will combine with hemoglobin in the blood to reduce the ability to transport blood and cause hypoxia; NO has carcinogenic effect and will have adverse effects on cell division and genetic information; in the atmosphere, NO in O 2 will be slowly oxidized to NO under the action of 2 , the generated NO 2 Enter the human respiratory system, causing lung and bronchial diseases. NO 2 It is the precursor of nitric acid and n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/56B01J37/34B01J23/34B01D53/86
Inventor 李乾聂安民孙祖芳易志龙
Owner 浙江德纳希环保科技股份有限公司
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