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Titanium-oxide-loaded thulium-modified manganese oxide low-temperature denitration catalyst with high specific surface area as well as preparation method and application thereof

A high specific surface area, low temperature denitrification technology, applied in the field of denitrification treatment, to achieve the effect of complete dispersion and exposure

Inactive Publication Date: 2020-12-15
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the denitrification catalyst, with a high specific surface area (184.3m 2 / g) TiO 2 The carrier was not used to load MnO x , and thulium, as an important rare earth element, has not been applied to modify MnO x Preparation of denitrification catalyst

Method used

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  • Titanium-oxide-loaded thulium-modified manganese oxide low-temperature denitration catalyst with high specific surface area as well as preparation method and application thereof
  • Titanium-oxide-loaded thulium-modified manganese oxide low-temperature denitration catalyst with high specific surface area as well as preparation method and application thereof
  • Titanium-oxide-loaded thulium-modified manganese oxide low-temperature denitration catalyst with high specific surface area as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0050] Prepare the thulium-modified manganese oxide low-temperature denitrification catalyst supported by titanium oxide with high specific surface area according to the method proposed by the present invention:

[0051] (1) Dissolve 1.0 g of manganese acetate and 0.6 g of thulium nitrate in 20 mL of deionized water at room temperature, and stir for 60 min;

[0052] (2) Place 1.0 g of titanium dioxide powder in the above solution at room temperature, and stir for 60 min;

[0053] (3) Stir the above solution at 80°C for 12h until all water is evaporated; dry the obtained solid powder at 80°C for 12h;

[0054] (4) Calcining the dried product in a muffle furnace, the calcination temperature is 360°C, and the heating rate is 1°C / min. After 4 hours of calcination, a thulium-modified manganese oxide low-temperature denitrification catalyst supported by titanium oxide with a high specific surface area is obtained. The morphology of the obtained catalyst is as follows figure 1 shown...

Embodiment 2

[0059] Prepare the thulium-modified manganese oxide low-temperature denitrification catalyst supported by titanium oxide with high specific surface area according to the method proposed by the present invention:

[0060] (1) Dissolve 0.8 g of manganese acetate and 0.5 g of thulium nitrate in 20 mL of deionized water at room temperature, and stir for 60 min;

[0061] (2) Place 1.0 g of titanium dioxide powder in the above solution at room temperature, and stir for 60 min;

[0062] (3) Stir the above solution at 80°C for 12h until all water is evaporated, and dry the obtained solid powder at 80°C for 12h;

[0063] (4) The dried product was calcined in a muffle furnace at a calcination temperature of 400° C. and a heating rate of 1° C. / min. After 5 hours of calcination, a thulium-modified manganese-titanium oxide catalyst was obtained.

[0064] In this catalyst, rare earth Tm and transition metal Mn oxides are evenly distributed in TiO 2 On the surface of the carrier, their mol...

Embodiment 3

[0067] A thulium-modified manganese oxide low-temperature denitrification catalyst supported by high specific surface area titanium oxide according to the embodiment of the present invention, the oxides of rare earth Tm and Mn are evenly distributed on TiO 2 The surface of the carrier; wherein, in terms of molar ratio, Tm:Mn:Ti=0.07:0.2:1. Tm is positive trivalent. The oxide of Mn is in the amorphous state, and the Mn 2+ , Mn 3+ , Mn 4+ Composed of three valence states. In mole percent, Mn 2 + :Mn 3+ :Mn 4+ =20%:50%:30%. TiO 2The carrier is anatase type, and Ti is positive tetravalent. The specific surface area of ​​the thulium-modified manganese oxide low-temperature denitrification catalyst is 110-190m 2 / g.

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Abstract

The invention discloses a titanium-oxide-loaded thulium-modified manganese oxide low-temperature denitration catalyst with high specific surface area as well as a preparation method and application thereof. The method comprises the following steps: (1) dissolving manganese acetate and thulium nitrate in deionized water at a room temperature, and performing stirring to obtain a mixed solution; (2)putting titanium dioxide powder into the mixed solution obtained in the step (1) at a room temperature, and performing stirring to obtain a mixed solution; (3) stirring the mixed solution obtained inthe step (2) at 60-90 DEG C until all water is evaporated to dryness to obtain a solid powder, and performing drying to obtain a dried product; and (4) calcining the dried product obtained in the step(3) at a temperature of 360-400 DEG C for 3-8 hours to obtain the titanium-oxide-loaded thulium-modified manganese oxide low-temperature denitration catalyst with high specific surface area. Thuliumoxide and manganese oxide are impregnated on a TiO2 carrier with a high specific surface area, so that the prepared catalyst has a large specific surface area, and complete dispersion and exposure ofactive components are facilitated.

Description

technical field [0001] The invention belongs to the technical field of denitration treatment, and in particular relates to a thulium-modified manganese oxide low-temperature denitration catalyst supported by titanium oxide with a high specific surface area and a preparation method and application thereof. Background technique [0002] Smog is one of the most serious environmental pollution problems, which seriously threatens the health and life safety of the people; among them, nitrogen oxides (NO x ) is one of the main pollutants causing smog. NO x It is extremely harmful, and its emission can cause photochemical smog, acid rain, ozone layer damage, and cause great harm to human health and the ecological environment. NO x It mainly comes from the combustion of fuels such as coal and petroleum used in production and life. Selective Catalytic Reduction with ammonia (NH 3 -SCR), vanadium-titanium catalysts (such as V 2 o 5 / TiO 2 , V 2 o 5 -WO 3 / TiO 2 ) is current...

Claims

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Application Information

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IPC IPC(8): B01J23/34B01J23/10B01J35/10B01J37/02B01D53/86B01D53/56
CPCB01J23/34B01J23/10B01J37/0201B01D53/8628B01D2258/0283B01J35/615
Inventor 石建稳牛慈航王宝瑞刘炜肖雷
Owner XI AN JIAOTONG UNIV
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