Supported metal M vanadate SCR catalyst and preparation method thereof

An SCR catalyst and a supported technology are applied in the field of supported vanadate SCR catalysts and their preparation to achieve the effects of simple and feasible preparation process, easy control of preparation conditions and less equipment.

Active Publication Date: 2019-09-10
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there are no literature and patent reports on the preparation method of t

Method used

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  • Supported metal M vanadate SCR catalyst and preparation method thereof
  • Supported metal M vanadate SCR catalyst and preparation method thereof
  • Supported metal M vanadate SCR catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Accurately weigh 1.17g of ammonium metavanadate and 4.02g of niobium nitrate and dissolve them in 50ml of deionized water respectively. After they are completely dissolved, add 1.0g of PEG-4000 to the ammonium metavanadate solution and stir to dissolve. Add the niobium nitrate solution dropwise to the ammonium metavanadate solution. After the dropwise addition, stir for 30 minutes, then boil it in a microwave oven, take it out, let it stand, remove the supernatant, dry and roast to obtain the 1# sample.

Embodiment 2

[0030] Accurately weigh 0.144g of ammonium metavanadate, dissolve it in 50ml of deionized water, then add 0.4g of PEG-4000, stir until completely dissolved, then add 10g of TiO 2 Powder; in addition, weigh 0.495g of niobium nitrate and dissolve it in 30ml of water, add it dropwise to the above solution, stir for 30 minutes, then boil it in a microwave oven, evaporate the solvent, dry it at 100°C, and transfer it to a muffle furnace Calcined at 500°C for 3h to obtain 2# sample.

Embodiment 3

[0032]Accurately weigh 0.485g of ammonium metavanadate, dissolve it in 50ml of deionized water, then add 1.0g of PEG-4000, stir until completely dissolved, then add 10g of TiO 2 Powder; in addition, weigh 1.654g of niobium nitrate and dissolve it in 30ml of water, add it dropwise to the above solution, stir for 30min, boil it in a microwave oven, evaporate the solvent, dry it at 100°C, and transfer it to a muffle furnace Calcined at 500°C for 3h to obtain 2# sample.

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Abstract

A supported metal M vanadate SCR catalyst and a preparation method thereof are disclosed and belong to the technical field of SCR denitration catalysts. The method includes firstly weighting a metal Msource, adding water and a surfactant, stirring the mixture for dissolution, adding a weighed vanadium precursor into the solution, stirring the mixture, weighing titanium dioxide, adding the titanium dioxide into the system after the metal M source and vanadate are mixed, heating the solution mixture to boiling in an electric sleeve or a microwave oven, stirring the mixture, performing ultrasonic water bath treatment, performing evaporation to remove a solvent, drying obtained solid, and roasting the solid in a muffle furnace at 450 to 750 DEG C for 1-5 h to obtain the target material. The catalyst prepared has high activity and high thermal stability, and the method has characteristics of less required equipment, low investment, simple preparation process and easy control of conditions.

Description

technical field [0001] The invention relates to a supported vanadate SCR catalyst and a preparation method, belonging to the technical field of SCR denitration catalysts. Background technique [0002] Since 2013, the persistent smog weather in my country has attracted widespread attention from all walks of life. The analysis of the causes of smog has also found that the formation of smog is closely related to NO in the atmosphere. x Emissions are closely related to nitrogen oxides NO x It is one of the main pollutants in the atmosphere. Its main sources include industrial exhaust emissions, motor vehicle exhaust emissions, etc., with an annual emission of more than 10 million tons. Pollutant NO x Controlling emissions is an important and challenging task at present and in the future. In order to achieve control and reduce NO x In the newly promulgated document, the plan and requirements for controlling nitrogen oxide emissions are further clearly stated. To achieve NO ...

Claims

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Application Information

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IPC IPC(8): B01J23/22B01J23/34B01D53/56B01D53/86
CPCB01J23/22B01J23/34B01D53/8628B01D2258/0283
Inventor 宋丽云李坚刘骐语李尧何洪梁思柔郝志超
Owner BEIJING UNIV OF TECH
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