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A kind of denitrification catalyst of macroporous-mesoporous TIO2 doped transition metal and preparation method thereof

A denitrification catalyst and transition metal technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical instrument and method, etc., can solve the problem that the production process is not easy to form and demould, and the porosity is not ideal , large amount of catalyst and other problems, to achieve the effect of increasing denitrification catalytic performance, improving circulation and diffusion performance, and easy to repeat

Active Publication Date: 2019-03-08
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing denitrification catalysts have problems such as low strength, easy pulverization, short service life, difficult molding and demolding during the production process, unsatisfactory porosity, low catalytic efficiency, large catalyst consumption, and high cost.

Method used

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  • A kind of denitrification catalyst of macroporous-mesoporous TIO2 doped transition metal and preparation method thereof
  • A kind of denitrification catalyst of macroporous-mesoporous TIO2 doped transition metal and preparation method thereof
  • A kind of denitrification catalyst of macroporous-mesoporous TIO2 doped transition metal and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] A macroporous-mesoporous TiO 2 The denitration catalyst doped with transition metal, its preparation method comprises the following steps:

[0043] Add 20ml of ammonia water with a mass fraction of 25% to the beaker, add 100ml of deionized water to the ammonia water for dilution, stir for 5 minutes and mix well to obtain an ammonia solution with a mass fraction of 5%; add 5ml of titanic acid to the ammonia solution at a constant speed Isopropyl ester solution (98wt%), a white precipitate was formed immediately, the precipitate was washed three times, placed in a 60°C oven, and left for 12h to obtain a white powder, which is macroporous-mesoporous TiO 2 Material.

[0044] Fully dissolve 0.156g of manganese nitrate tetrahydrate in 30ml of deionized water, and after stirring for 5min, add 2g of the macroporous-mesoporous TiO prepared above into the beaker. 2 , continue to stir for 2h (30°C), and then place the entire system in a 100°C oven for 24h. The obtained sample w...

Embodiment 2

[0047] A macroporous-mesoporous TiO 2 The denitration catalyst doped with transition metal, its preparation method comprises the following steps:

[0048] Add 20ml of ammonia solution whose mass fraction is 25% in the beaker, then add 100ml of deionized water to the ammonia solution to dilute, stir for 5min and mix well, get the ammonia solution and evenly add 5ml of isopropyl titanate solution to the ammonia solution ( 98wt%), a white precipitate was formed immediately, the precipitate was washed three times, placed in an oven at 60 °C, and allowed to stand for 12 h to obtain a white powder, which is macroporous-mesoporous TiO 2 Material.

[0049] Fully dissolve 0.47g of manganese nitrate tetrahydrate in 30ml of deionized water, stir for 5min, add 2g of the macroporous-mesoporous TiO prepared above into the beaker 2 , continue to stir for 2h (30°C), and then place the whole system in a 100°C oven for 24h. The obtained sample was taken out and placed in a muffle furnace for...

Embodiment 3

[0052] A macroporous-mesoporous TiO 2 The denitration catalyst doped with transition metal, its preparation method comprises the following steps:

[0053] Add 20ml of ammonia water with a mass fraction of 25% to the beaker, add 100ml of deionized water to the ammonia water for dilution, stir for 5 minutes and mix well to obtain an ammonia solution with a mass fraction of 5%; add 5ml of titanic acid to the ammonia solution at a constant speed Isopropyl ester solution (98wt%), a white precipitate was formed immediately, the precipitate was washed three times, placed in a 60°C oven, and left for 12h to obtain a white powder, which is macroporous-mesoporous TiO 2 Material.

[0054] Fully dissolve 0.783g of manganese nitrate tetrahydrate in 30ml of deionized water, and after stirring for 5min, add 2g of the macroporous-mesoporous TiO prepared above into the beaker. 2 , continue to stir for 2h (30°C), and then place the entire system in a 100°C oven for 24h. The obtained sample w...

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Abstract

The invention discloses a macroporous-mesoporous TiO2 doping transition metal denitration catalyst and a preparation method thereof. In the invention, with relatively-regular macroporous-mesoporous TiO2 as a carrier material, transition metals are doped with a generated macroporous-mesoporous skeleton, so that the transition metals are fully and uniformly mixed with the hierarchical-porous skeleton to obtain the macroporous-mesoporous TiO2 doping transition metal denitration catalyst. The preparation method is simple and available, employs easy-to-control synthetic conditions, has short period and is suitable for large-scale production. The denitration catalyst has excellent pore permeability, very high specific surface area and excellent denitration catalytic performance, and has important promoting effect in the field of catalysis and is suitable for being promoted.

Description

technical field [0001] The invention belongs to the technical field of inorganic composites, and in particular relates to a preparation method of a denitration catalyst doped with a multi-level pore macroporous-mesoporous TiO2 transition metal. Background technique [0002] TiO 2 The material has many excellent properties such as non-toxic, harmless and environmentally friendly, and is a new type of material that has attracted much attention in recent years. As an important carrier in SCR denitration catalyst, TiO 2 The material has good catalytic performance and reactivity, TiO 2 The catalytic effect of the material mainly comes from the transition metal properties of titanium. [0003] At present, the most used flue gas SCR denitration is V 2 O 5 / TiO 2 As the main catalyst, its denitration efficiency can reach 90%. except V 2 O 5 In addition, there are many active substances that can interact with TiO 2 Composites such as noble metals (Pt, Au, Pd, Rh, etc.) and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/34B01J35/10B01D53/86B01D53/56
Inventor 陈丽华彭钊郑伟宏欧阳逸挺苏宝连黄丹娅李昱邓兆
Owner WUHAN UNIV OF TECH
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