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Vanadium-tungsten denitration catalyst and preparation method thereof

A denitrification catalyst and catalyst technology, applied in the field of denitrification catalysts, can solve the problems of high preparation cost, difficulty in loading, and reduced utilization of catalyst active components, and achieve the effects of reducing preparation cost, improving denitrification efficiency, and enlarging and microporous structure

Active Publication Date: 2015-07-22
ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation cost of this technology is high, and at the same time, the active ingredients ammonium metavanadate and ammonium metatungstate are difficult to load inside the ceramic fiber honeycomb structure, resulting in a decrease in the utilization rate of the active ingredients of the catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The preparation method of a vanadium-tungsten denitration catalyst provided in this embodiment comprises the following steps:

[0019] (1) Take 100g of activated carbon, reflux it in ammonia water for 4 hours, take it out, wash it with deionized water until the washing liquid is neutral, add water and stir to obtain activated carbon slurry;

[0020] (2) Add 10g of ammonium tungstate and 2g of ammonium metavanadate to the oxalic acid solution with a mass fraction of 2%, stir and mix until the ammonium tungstate and ammonium metavanadate are completely dissolved to obtain a mixed solution;

[0021] (3) Add the mixed solution into the activated carbon slurry, ultrasonicate for 1 hour, add phenolic resin and glycerin, stir evenly, and obtain the raw material solution;

[0022] (4) Dry the raw material solution at 100°C to constant weight, and then calcinate at 400°C for 2 hours to obtain the vanadium-tungsten denitrification catalyst powder, and finally add water to wet the...

Embodiment 2

[0026] The preparation method of another vanadium-tungsten denitration catalyst provided in this embodiment comprises the following steps:

[0027] (1) Take 50g of activated carbon, reflux it in ammonia water for 4 hours, take it out, rinse with deionized water until the washing liquid is neutral, add water and stir to obtain activated carbon slurry;

[0028] (2) Add 5g of ammonium tungstate and 1.25g of ammonium metavanadate to the oxalic acid solution with a mass fraction of 2%, stir and mix until the ammonium tungstate and ammonium metavanadate are completely dissolved to obtain a mixed solution;

[0029] (3) Add the mixed solution into the activated carbon slurry, ultrasonicate for 1 hour, add polyvinyl alcohol and glycerin, stir evenly, and obtain the raw material solution;

[0030] (4) Dry the raw material solution at 100°C to constant weight, and then calcinate at 400°C for 2 hours to obtain catalyst powder. Finally, add water to wet the powder, and press the powder int...

Embodiment 3

[0034] The preparation method of another vanadium-tungsten denitration catalyst provided in this embodiment comprises the following steps:

[0035] (1) Take 100g of activated carbon, reflux it in ammonia water for 4 hours, take it out, wash it with deionized water until the washing liquid is neutral, add water and stir to obtain activated carbon slurry;

[0036] (2) Add 10g of ammonium tungstate and 3.3g of ammonium metavanadate to the oxalic acid solution with a mass fraction of 2%, stir and mix until the ammonium tungstate and ammonium metavanadate are completely dissolved to obtain a mixed solution;

[0037] (3) Add the mixed solution into the activated carbon slurry, ultrasonicate for 1 hour, add polyacrylamide and ethanolamine, stir evenly, and obtain the raw material solution;

[0038] (4) Dry the raw material solution at 100°C to constant weight, and then calcinate at 400°C for 2 hours to obtain catalyst powder. Finally, add water to wet the powder, and press the powder...

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Abstract

The invention discloses a vanadium-tungsten denitration catalyst and a preparation method thereof. The catalyst is characterized in that active carbon is taken as a carrier, vanadium pentoxide is taken as a main active ingredient, and an organic binding agent and a forming addition agent are simultaneously added to assist the forming of the catalyst. Compared with the prior art, the preparation method disclosed by the invention has the advantages that the cost is low; as the specific surface area of the active carbon is large, the active ingredient can be well dispersed at the surface of the carrier, the contact area between gas and the catalyst is increased, and the denitration efficiency is improved; the denitration efficiency of the denitration catalyst can reach above 95% in a temperature range of 350-400 DEG C.

Description

technical field [0001] The invention relates to a denitration catalyst, in particular to a vanadium-tungsten denitration catalyst and a preparation method thereof. Background technique [0002] Coal is one of the main energy sources in my country. A large amount of nitrogen oxides emitted by coal combustion every year has brought great damage to the environment. At present, flue gas denitrification is one of the effective methods to control the emission of nitrogen oxides in the process of coal combustion. Among them Selective catalytic reduction (SCR) technology has been widely used in the flue gas denitrification process of coal-fired power plants because of its high denitrification efficiency, good selectivity, and stable and reliable operation. [0003] Catalyst is the core of SCR technology, and the study of catalytic materials has always been a research hotspot in SCR technology. At present, most of the SCR catalysts currently used in China are imported monolithic cata...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/30B01D53/86B01D53/56
Inventor 张庆丽徐辉
Owner ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH
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