A kind of denitrification catalyst and preparation method thereof

A denitration catalyst and solvent technology, applied in the field of flue gas denitration, can solve the problems of high qualification rate of catalyst catalyst, narrow applicable temperature range, low denitration removal rate, etc., achieve excellent catalytic activity, widen temperature adaptation width, and improve active load Effect

Active Publication Date: 2019-02-22
YIXING YIGANG ENVIRONMENTAL PROTECTION ENG & MATERIALS
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The first object of the present invention is to provide a method for preparing a denitrification catalyst, so as to solve the problems in the prior art that the denitrification catalyst has a high service temperature, a narrow applicable temperature range, and a low denitrification removal rate. Simple and suitable for industrialization; the catalyst prepared by the preparation method has high activity loading and high catalyst qualification rate, and greatly improves the physical strength and activity stability of the catalyst

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  • A kind of denitrification catalyst and preparation method thereof
  • A kind of denitrification catalyst and preparation method thereof
  • A kind of denitrification catalyst and preparation method thereof

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preparation example Construction

[0035] The present invention provides a kind of preparation method of denitration catalyst, comprises the following steps:

[0036] (a) dissolving the vanadium-containing compound in a solvent, and concentrating to obtain a concentrated solution of the vanadium-containing compound;

[0037] (b) uniformly mixing the carrier, the mixed solution of the tungsten-containing compound and the molybdenum-containing compound, and the concentrated solution of the vanadium-containing compound, kneading, molding, and calcining to obtain the denitration catalyst.

[0038] In a preferred embodiment of the present invention, the solvent in the step (a) includes monoethanolamine.

[0039] In a preferred embodiment of the present invention, the solvent in the step (a) is an aqueous solution of monoethanolamine. More preferably, the mass fraction of monoethanolamine in the aqueous solution of monoethanolamine is 15-25%, preferably 18-22%, more preferably 20%.

[0040] The monoethanolamine can...

Embodiment 1

[0059] The preparation method of the denitration catalyst described in this embodiment comprises the following steps:

[0060] (a) Mix 20g of monoethanolamine and 80g of deionized water to obtain an aqueous solution of monoethanolamine, add 23g of ammonium metavanadate to it, heat up to 95±3°C, stir for 40-90min until the solution is clear; then lower the temperature to 75- 80°C, maintained at this temperature, concentrated by stirring distillation, the concentration rate was 0.75, and the concentrated solution of vanadium-containing compounds was obtained.

[0061] (b) Get 60g titanium dioxide and 9g cordierite, mix with 5g mass fraction of 25% ammonia water and 10g deionized water, and pretreat the carrier (or mix ammonia water and deionized water to make a certain mass fraction of ammonia water Then mixed with the carrier, all can be);

[0062] Prepare a mixed solution of tungsten-containing compound and molybdenum-containing compound: Take 2.7g of ammonium metatungstate a...

Embodiment 2

[0065] The preparation method of the denitration catalyst described in this embodiment comprises the following steps:

[0066] (a) Mix 25g of monoethanolamine and 75g of deionized water to obtain an aqueous solution of monoethanolamine, add 46g of ammonium metavanadate to it, heat up to 93±3°C, stir for 40-90min until the solution is clear; then lower the temperature to 75- 80°C, maintained at this temperature, concentrated by stirring distillation with a concentration ratio of 0.9 to obtain a concentrated solution of vanadium-containing compounds.

[0067] (b) Get 60g titanium dioxide and 9g cordierite, mix with 5g mass fraction of 25% ammonia water and 10g deionized water, and pretreat the carrier (or mix ammonia water and deionized water to make a certain mass fraction of ammonia water Then mixed with the carrier, all can be);

[0068] Prepare a mixed solution of tungsten-containing compound and molybdenum-containing compound: Take 2.7g of ammonium metatungstate and 3.1g o...

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Abstract

The invention relates to the technical field of flue gas denitration, in particular to a denitration catalyst and a preparation method thereof. The preparation method of the denitration catalyst comprises the following steps: (a), dissolving a vanadium-containing compound into a solvent, and concentrating to obtain a concentrated solution of the vanadium-containing compound; (b) uniformly mixing acarrier, a mixed solution of a tungsten-containing compound and a molybdenum-containing compound, and the concentrated solution of the vanadium-containing compound, kneading, forming and roasting toobtain the denitration catalyst. The denitration catalyst prepared by the preparation method is high in active load, can be used for preparing a catalyst product with high vanadium content, and has vanadium load amount of 8%-10%; and the catalyst product can be matched with other active components, so that the denitration catalyst is suitable for a temperature range from 160 to 400 DEG C.

Description

technical field [0001] The invention relates to the technical field of flue gas denitration, in particular to a denitration catalyst and a preparation method thereof. Background technique [0002] Nitrogen oxides (NO X ) is a very harmful air pollutant. Atmospheric NO X Almost half of them are produced by man-made pollution sources, mainly from the combustion of fossil fuels such as coal, oil, and natural gas used in production and life, and are emitted by industries such as electric power, chemistry, and national defense, as well as boilers, internal combustion engines, and other equipment. one of the toxic substances. NO X The amount produced by the fuel combustion process is the largest, accounting for about 30%, of which about 70% comes from the direct combustion of coal. Atmospheric NO X It will cause certain damage to human health and the survival of animals and plants, such as the formation of acid rain, photochemical smog, etc., so it is urgently needed to be t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/30B01D53/86B01D53/56
CPCB01D53/8628B01D2255/20723B01D2255/20769B01D2255/20776B01D2258/0283B01J23/30
Inventor 裴叶舜
Owner YIXING YIGANG ENVIRONMENTAL PROTECTION ENG & MATERIALS
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