SCR granular catalyst substrate and preparation method thereof

A catalyst and granular technology, which is applied in the field of SCR granular catalyst matrix and its preparation, can solve the problems of activated carbon discomfort and other problems, and achieve the effects of low cost, simple preparation process and good loading effect

Inactive Publication Date: 2009-07-08
CPI YUANDA ENVIRONMENTAL PROTECTION ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the catalyst needs to be calcined on the substrate loaded with active components during the production process, and activated carbon obviously cannot be calcined at high temperature, so activated carbon is not suitable for use as a substrate for SCR catalysts

Method used

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  • SCR granular catalyst substrate and preparation method thereof
  • SCR granular catalyst substrate and preparation method thereof
  • SCR granular catalyst substrate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In this embodiment, the SCR granular catalyst substrate includes the following components by mass percentage:

[0030] Base material 88%

[0031] Binder 5%

[0032] Structural aid 4%

[0033] water 3%

[0034] Wherein, the base material is silicon carbide, the binder is carboxymethyl cellulose, and the structural aid is glass fiber.

[0035] The preparation method of the present embodiment comprises the following steps:

[0036] a. Add carboxymethyl cellulose, glass fiber and water to silicon carbide, stir for 1 hour to evenly form catalyst matrix raw materials;

[0037] b. Complete the airtight aging of the evenly stirred catalyst matrix raw materials in a sealed plastic bag for 24 hours, so that the adhesive and the raw materials are evenly combined;

[0038] c. Compress the stale catalyst substrate raw material, and dry it at 105°C for 6 hours, so that the water absorption rate is less than or equal to 1%;

[0039] d. Calcining the dried catalyst substrate raw ...

Embodiment 2

[0043] In this embodiment, the SCR granular catalyst substrate includes the following components by mass percentage:

[0044] Base material 93%

[0045] Binder 3%

[0046] Structural aid 1%

[0047] water 3%

[0048] Wherein, the matrix material is silicon carbide, the binder is starch, and the structural aid is carbon fiber.

[0049] The preparation method of the present embodiment comprises the following steps:

[0050] a. Add starch, carbon fiber and water to the silicon carbide, and stir for 1 hour to evenly form the catalyst matrix raw material;

[0051] b. Put the homogeneously stirred catalyst matrix raw materials in a sealed plastic bag to complete airtight aging for 12 hours, so that the adhesive and raw materials can be evenly combined;

[0052] c. Compress the stale catalyst substrate raw material, and dry it at 105°C for 2 hours, so that the water absorption rate is less than or equal to 1%;

[0053] d. Calcining the dried catalyst substrate raw material at 1...

Embodiment 3

[0057] In this embodiment, the SCR granular catalyst substrate includes the following components by mass percentage:

[0058] Base material 80%

[0059] Binder 8%

[0060] Structural aid 4%

[0061] Water 8% of which,

[0062] The matrix material is silicon carbide, the binder is polyvinyl alcohol, and the structural aid is glass fiber.

[0063] The preparation method of the present embodiment comprises the following steps:

[0064] a. Add polyvinyl alcohol, glass fiber and water to the silicon carbide, stir for 1 hour to evenly form the catalyst matrix raw material;

[0065] b. Put the homogeneously stirred catalyst matrix raw materials in a sealed plastic bag to complete airtight staleness for 48 hours, so that the adhesive and raw materials can be evenly combined;

[0066] c. Compress the stale catalyst substrate raw material, and dry it at 105°C for 8 hours, so that the water absorption rate is less than or equal to 1%;

[0067] d. Calcinate the dried catalyst substr...

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Abstract

The invention discloses an SCR granular catalyst matrix and a preparation method thereof. The matrix is composed of the following components in accordance with mass percent: 80-93% matrix, 3-8% binder, 1-4% structure promoter and 3-8% water. The SCR granular catalyst matrix is obtained by uniformly stirring, closely ageing, press forming, drying and calcining. The invention is prepared by employing the easily obtained matrix, binder and structure promoter in simple process, which has good loading effect on the active component, can fit all the preparation processes of the catalyst on each stage, is low in cost, simple in preparation technology and fit for industry promotion and large-scale production capability formation, thus is fit for promoting air pollution control.

Description

technical field [0001] The invention relates to a catalyst technology, in particular to an SCR granular catalyst substrate and a preparation method thereof. Background technique [0002] With the rapid development of science and technology, more and more attention is paid to the impact on the environment, and the requirements for environmental emission standards are becoming more and more stringent. It is these requirements that have led to the large-scale industrial application of SCR and SNCR processes. The combination of existing process technologies and low NOx boilers can greatly reduce the exhaust volume of NOx, which can also effectively reduce the concentration of ground ozone and Acid rain pollution. [0003] Developing countries such as my country have not yet taken practical and effective treatment measures for NOx emission pollution in flue gas. Existing denitrification equipment has high investment and operating costs, complicated process, difficult operation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/224B01J21/04B01J21/00B01J35/02B01J35/04B01D53/56B01D53/86
Inventor 杨剑杜云贵刘清才刘艺董凌燕隋建才洪燕丁小红吴其荣
Owner CPI YUANDA ENVIRONMENTAL PROTECTION ENG
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