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SCR (Semiconductor Control Rectifier) catalyst and preparation method thereof

A technology of SCR catalyst and weight percentage, which is applied in the field of SCR catalyst and its preparation, can solve the problems of poor low-temperature activity, achieve high-temperature activity, large tail gas catalytic reaction area, and improve low-temperature activity

Inactive Publication Date: 2013-09-25
ANHUI ACT BLUE ENVIRONMENTAL PROTECTION CO LTD
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  • Abstract
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Problems solved by technology

[0004] However, traditional SCR catalysts still have the problem of poor low-temperature activity in actual use. Therefore, for the NO X emission, there is an urgent need to develop catalysts with excellent low-temperature activity and high-temperature activity

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  • SCR (Semiconductor Control Rectifier) catalyst and preparation method thereof
  • SCR (Semiconductor Control Rectifier) catalyst and preparation method thereof

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Embodiment Construction

[0023] The SCR catalyst of the present invention mainly comprises: copper acetate of 30.30% by weight, cerium nitrate of 15.15% by weight, metatungstic acid of 18.9% by weight, metavanadic acid of 7.57% by weight, oxalic acid of 18.9% by weight and Percentage 9.18% titanium dioxide.

[0024] In order to further improve the low-temperature activity of the SCR catalyst, 3% to 8% of copper, 2% to 5% of vanadium, 4% to 8% of tungsten, 5% to 8% of cerium, 15% to 20% titanium, using copper, vanadium, titanium, tungsten as active components, cerium as additives, to achieve.

[0025] The preparation method of SCR catalyst comprises the steps:

[0026] a) Put copper acetate and cerium nitrate in the reaction kettle a according to the above weight ratio, and mix them uniformly to obtain a mixed solution a;

[0027] b) Put metatungstic acid, metavanadic acid and oxalic acid in the reaction kettle b according to the above weight ratio, and mix them uniformly to obtain a mixed soluti...

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Abstract

The invention discloses an SCR (Semiconductor Control Rectifier) catalyst and a preparation method thereof. The SCR catalyst is characterized by comprising the following ingredients in percentage by weight: 30.30% of cupric acetate, 15.15% of cerous nitrate, 18.9% of metatungstate, 7.57% of metavanadate, 18.9% of oxalic acid and 9.18% of titanium dioxide. SCR catalyst is obtained by mixing cupric acetate to obtain a mixture solution a, mixing the metatungstate, the metavanadate and the oxalic acid to obtain a mixture solution b, subsequently mixing the mixture solution a with the mixture solution b to obtain a mixture solution c, adding titanium dioxide into the mixture solution c to obtain aqueous slurry, and finally coating the aqueous slurry on a cordierite honeycomb ceramic carrier for roasting. The SCR catalyst contains cupric acetate, cerous nitrate, metatungstate, metavanadate, oxalic acid and titanium dioxide, so that the SCR catalyst has the characteristics of excellent low-temperature activity and high high-temperature activity.

Description

technical field [0001] The invention relates to an SCR catalyst and a preparation method thereof, in particular to an SCR catalyst with high catalytic reaction efficiency, excellent low-temperature activity and high-temperature activity in the temperature range of 200-500° C. and a preparation method thereof. Background technique [0002] With the rapid development of my country's economy and the continuous growth of energy consumption, the energy consumption mode dominated by fossil fuels has led to the emission of nitrogen oxides (NO X ) and other hazards continue to aggravate, so effective control of NO X Emissions are an important part of environmental governance. [0003] At present, selective catalytic reduction technology is the most widely used NO X removal technique. According to different reducing agents, it can be divided into ammonia selective catalytic reduction of NO X Selective catalytic reduction of NO with hydrocarbons X technology. Among them, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38B01D53/86B01D53/56
Inventor 刘屹朱庆朱弢朱志强成薛峰
Owner ANHUI ACT BLUE ENVIRONMENTAL PROTECTION CO LTD
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