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Surface deposition honeycomb flue gas denitration catalyst and preparation method thereof

一种脱硝催化剂、表面沉积的技术，应用在催化剂活化/制备、化学仪器和方法、物理/化学过程催化剂等方向，能够解决价格昂贵、无法保证催化剂活性组分与活性载体结合、催化活性低等问题，达到利用率高、拓宽使用温度与应用范围、催化活性高的效果

Active Publication Date: 2012-01-18
CHINA KINGSUN MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation methods of these patents cannot guarantee the combination between the active components of the catalyst and the active carrier, resulting in low catalytic activity and expensive

Method used

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  • Surface deposition honeycomb flue gas denitration catalyst and preparation method thereof
  • Surface deposition honeycomb flue gas denitration catalyst and preparation method thereof
  • Surface deposition honeycomb flue gas denitration catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] 1. Preparation of composite carrier

[0059] 100g titanyl sulfate is dissolved in 150ml water, and its concentration is 4.1mol / L, adds Tween 20 surfactant 5g, and its mass concentration is 2%, urea 25g, adds 50g gac (surface area: 450m 2 / g, particle size 50-100μm), stir at 50°C for 2h, metatitanic acid nucleates once in the Martian carbon channels and surfaces, the mass ratio of titanium dioxide to the carrier obtained is 1:1, raise the temperature to 90°C, and continue stirring for 1h , gradually add an aqueous solution containing 7.5g of ammonium tungstate dropwise within 1 hour, filter and wash the reaction slurry to neutrality, dry at 100°C for 8 hours, and dry under N 2 In the atmosphere, the temperature was raised to 500° C. at a heating rate of 5° C. / min, and calcined for 5 hours to obtain 100 g of a composite carrier containing nano-titanium tungsten powder. XRD Characterization of TiO in Complex Support 2 It is anatase type, the diffraction peak intensity at...

Embodiment 2

[0065] 1. Preparation of composite carrier

[0066] 16g titanyl sulfate is dissolved in 1000ml water, and its concentration is 0.1mol / L, adds polyethylene glycol 2000 surfactant 10g, and its mass concentration is 1%, urea 50g, after stirring and dissolving at 50 ℃, add 80g gac to react 1h (nano Carbon black: 200m 2 / g, average particle size 2μm), metatitanic acid nucleates once in the pores and surface of activated carbon, the mass ratio of obtained titanium dioxide to carrier is 1:10, raise the temperature to 150°C and gradually add 1.5g sodium tungstate The aqueous solution continued to stir and react for 10h, and the treatment steps after slurry filtration were the same as those in step 1 of Example 1. XRD Characterization of TiO in Complex Support 2 It is anatase type, the diffraction peak intensity at the 26° position is 1600, TEM characterizes TiO 2 The particle size is 5-10nm. XRF Characterization of TiO in Composite Support 2 Content is 10wt%, carbon is 89wt%, WO ...

Embodiment 3

[0072] 1. Preparation of composite carrier

[0073] Dissolve 800g of titanyl sulfate in 1000ml of water, the concentration is 5mol / L, add 100g of span 80 surfactant, its mass concentration is 5%, 50g of urea, 50g of ammonium tungstate, 7.2g of vanadyl sulfate, stir and dissolve at 30°C Add 100g polystyrene microspheres (surface area: 200m 2 / g, particle size 2μm), reacted at 150°C for 10h (pressurized), and the treatment steps after slurry filtration were the same as those in step 1 of Example 1. V 2 o 5 The loading amount is TiO 2 1wt% of WO 3 The loading amount is TiO 2 10wt%, XRD characterization of TiO in the complex carrier 2 It is anatase type, the diffraction peak intensity at the 26° position is 1600, TEM characterizes TiO 2 The particle size is 5-10nm. XRF Characterization of TiO in Composite Support 2 Content is 80wt%, carbon is 11.2wt%, WO 3 8wt%, V 2 o 5 0.8wt.%.

[0074] 2. Preparation of honeycomb catalyst

[0075] 6.5kg of composite catalyst prepar...

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Abstract

The invention relates to the environmental protection field of flue gas treatment of gas-fired boilers, in particular to a surface deposition honeycomb flue gas denitration catalyst and a preparation method thereof. The catalyst comprises a honeycomb framework which takes clay, soot dust or slag as a substrate; TiO2 is taken as an active carrier; WO3 and V2O5 serving as active ingredients are loaded on the TiO2 active carrier, and are uniformly distributed in the honeycomb framework; and the catalyst comprises the following components in percentage by weight: 60-80 percent of clay, soot dust or slag, 13-33 percent of TiO2, 1-5 percent of WO3 and 0.1-2 percent of V2O5. By transferring an ignition lost transition carrier, highly dispersion of catalyst nanoparticles on a molding catalyst pore cannel and an outer surface is realized, and the utilization ratio and catalytic activity of the active ingredients are increased greatly.

Description

technical field [0001] The invention relates to the environmental protection field of coal-fired boiler flue gas treatment, in particular, the invention relates to a surface deposition type honeycomb flue gas denitrification catalyst and a preparation method thereof. Background technique [0002] Nitrogen oxides are one of the main air pollutants that cause a series of problems such as acid rain and photochemical smog that damage the earth's ecological environment, and are also the key and difficult points in the current atmospheric environmental protection. More than 90% of nitrogen oxides (NO X ) originates from the combustion process of fossil fuels (such as coal, oil, natural gas, etc.), 70% of which comes from the combustion of coal, while the coal used for thermal power and various industrial boilers and kilns accounts for more than 70% of the country’s coal consumption, so man-made NO X The main sources of emissions are thermal power plants and various coal-fired in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/30B01J35/04B01D53/86B01D53/56
CPCB01J21/16B01J37/0201B01D53/9409B01D53/86B01D2255/20776B01J35/023B01J35/04B01D53/56B01D2255/20723B01J23/30B01D2255/20707B01J37/0018B01D53/8628B01J35/40B01J35/56
Inventor 余剑郭凤杨娟汪印董利高士秋许光文
Owner CHINA KINGSUN MATERIAL TECH
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