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Denitration catalyst, preparation method of denitration catalyst and denitration method

A denitration catalyst and manganese oxide technology, applied in the field of denitration catalysts, can solve the problems of improved catalyst activity, insufficient optimum temperature for high activity, etc., and achieve the effects of high denitration activity at low temperature, wide denitration temperature range, and high denitration efficiency.

Active Publication Date: 2019-03-08
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The present invention provides a method for preparing a denitrification catalyst, aiming to improve the problems of existing low-temperature denitrification catalysts, such as that the optimum temperature for high activity is still not low enough, and the catalyst activity needs to be improved.

Method used

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  • Denitration catalyst, preparation method of denitration catalyst and denitration method

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preparation example Construction

[0024] A method for preparing a denitration catalyst, comprising: drying a manganese source, a zirconium source, and graphene oxide after a hydrothermal reaction, and roasting at 300-600°C after drying, and manganese source and zirconium source corresponding to each other The molar ratio of manganese oxide and zirconium oxide is 3.5-4.5:1, and the ratio of the total mass of manganese oxide and zirconium oxide corresponding to manganese source and zirconium source to the mass of graphene oxide is 1000:2-7.

[0025] In the present invention, manganese source and zirconium source refer to the manganese oxide and zirconium oxide corresponding to them respectively: the amount of manganese oxide and zirconium oxide obtained after manganese source and zirconium source are respectively roasted.

[0026] Oxides can exist in a variety of unstable valence states in the catalyst, while facilitating redox reactions. Manganese-based catalysts use zirconia as a carrier. Zirconia is a p-type ...

Embodiment 1

[0046] This embodiment provides a denitration catalyst and a preparation method thereof.

[0047] A kind of preparation method of denitration catalyst:

[0048] Manganese acetate and zirconium nitrate are mixed in a molar ratio of 3.5:1 corresponding to manganese oxide and zirconium oxide (that is, manganese oxide and zirconium oxide generated respectively after roasting) to obtain a composite metal mixture, which is then dissolved in distilled water and compounded The metal mixture is dissolved in distilled water with the corresponding metal oxide at a ratio of 0.4mol:100ml to obtain a solution with manganese ions and zirconium ions. Then add graphene oxide to the metal ion solution, stir for about 30 minutes to make it mix uniformly to obtain the first mixed solution, the quality of the amount of graphene oxide added is the total mass of manganese oxide and zirconium oxide corresponding to manganese acetate and zirconium nitrate respectively The ratio is 2:1000.

[0049] A...

Embodiment 2

[0054] This embodiment provides a denitration catalyst and a preparation method thereof.

[0055] A kind of preparation method of denitration catalyst:

[0056] Mix manganese acetate and zirconium nitrate in a molar ratio of 4.5:1 corresponding to manganese oxide and zirconium oxide to obtain a composite metal mixture, and then dissolve it in distilled water. Dissolved in distilled water to obtain a solution with manganese and zirconium ions. Then add graphene oxide to the metal ion solution, stir for about 30 minutes to make it mix uniformly to obtain the first mixed solution, the quality of the amount of graphene oxide added is the total mass of manganese oxide and zirconium oxide corresponding to manganese acetate and zirconium nitrate respectively The ratio is 7:1000.

[0057] Add ammonia water to the first mixed solution, mix and stir for about 30 minutes, and adjust the pH to 10.6 to obtain the second mixed solution.

[0058] The second mixed solution was placed in a ...

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Abstract

The invention relates to the technical fields of chemical engineering and environment protection and provides a denitration catalyst which comprises a carrier and manganese oxide carried by the carrier, wherein the carrier comprises zirconium oxide and graphene oxide, wherein the mole ratio of the manganese oxide to the zirconium oxide is (3.5-4.5):1; and the mass ratio of the total mass of the manganese oxide and the zirconium oxide to the mass of the graphene oxide is 1000:(2-7). The invention provides a preparation method of the denitration catalyst. The preparation method comprises the following steps: carrying out a hydrothermal reaction on a manganese source, a zirconium source and graphene oxide, drying, and roasting after drying. The denitration catalyst and the denitration catalyst prepared with the preparation method are wide in appropriate working temperature, and have relatively high activity under a low temperature condition. The invention further provides a denitration method. The denitration catalyst or the denitration catalyst prepared with the preparation method is used in the denitration process. The denitration method is applicable to relatively wide denitrationtemperatures, and relatively high activity is still achieved at low temperatures.

Description

technical field [0001] The invention relates to the field of denitration catalysts, in particular to a denitration catalyst, a preparation method of the denitration catalyst and a denitration method. Background technique [0002] Nitrogen oxides (NOx) are one of the main sources of air pollution. The causes of NOx can be divided into two aspects: natural sources and man-made sources. Among them, thermal power plants, iron factories, chemical plants, etc. have NOx emissions from fixed sources of fuel combustion, mobile sources such as automobiles, and intermediate products produced in industrial processes account for more than 90% of the total man-made emissions. Industrial NOx emissions account for 60% of total emissions, and the situation of NOx control from industrial sources is still very severe. [0003] Selective catalytic reduction technology (SCR technology) is currently the most widely used flue gas denitrification technology in the world. Its principle is that redu...

Claims

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Application Information

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IPC IPC(8): B01J23/34B01D53/86B01D53/56
CPCB01D53/8628B01J23/34
Inventor 楚英豪黄倩雯尹华强郭家秀岑望来
Owner SICHUAN UNIV
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