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Preparation method of high-vanadium honeycomb type SCR denitration catalyst

A denitrification catalyst, honeycomb technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of adding enough, and achieve easy operation, strong practicability, and large load capacity Effect

Inactive Publication Date: 2015-01-28
CHENGDU DONGFANG KWH ENVIRONMENTAL PROTECTION CATALYSTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the one-time loading volume of the carrier is certain, it is affected by the active component V 2 o 5 Solubility, the traditional process is difficult to add enough active components in this one-time batching, so that V in the catalyst 2 o 5 over 1% (converted to V 2 o 5 After the mass fraction, the same below) content

Method used

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  • Preparation method of high-vanadium honeycomb type SCR denitration catalyst
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  • Preparation method of high-vanadium honeycomb type SCR denitration catalyst

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Effect test

Embodiment 1

[0029] Select a honeycomb-shaped SCR denitration catalyst monomer after one-time calcination and code it as 1#, and measure its V by XRF 2 o 5 The content is 0.26%. If designing a single V 2 o 5 The content is adjusted to 1.00%, the monomer pore volume of the measured monomer is 0.25cm3 / g, and the formula 1 is used to calculate the V 2 o 5 Concentration is (1.00-0.26) * 10 / 0.25=29.60g / l impregnating liquid. Its concentration is 29.37g / l to detect with spectrophotometer. Continue to follow the method step to completely immerse the monomer in the impregnating liquid for 30 minutes, use The pump maintains a slow and continuous flow of impregnating liquid through the cells' pores. The monomer was taken out, and the remaining impregnating solution on the surface of the catalyst was filtered. The impregnated monomer is put into a drying furnace and a calcination furnace for drying and calcination. After taking out the monomer after calcination, measure the V of its monomer wi...

Embodiment 2

[0031] Select a honeycomb-shaped SCR denitration catalyst monomer after one-time calcination and code it as 2#, and measure its V by XRF 2 o 5 The content is 0.51%. If designing a single V 2 o 5 The content is adjusted to 1.71%, and the pore volume of the monomer is measured to be 0.27cm3 / g, and the formula 1 is used to calculate the V 2 o 5 Concentration of (1.71-0.51) * 10 / 0.26 = 46.15g / l impregnating solution. Prepare 400KG of impregnating solution, and use a spectrophotometer to detect its concentration as 46.58g / l. Continue to completely impregnate the monomer in the impregnating solution according to the method steps For 30 minutes in the liquid, use a pump to keep the impregnating liquid flowing slowly and continuously through the pores of the monomer. The monomer was taken out, and the remaining impregnating solution on the surface of the catalyst was filtered. The impregnated monomer is put into a drying furnace and a calcination furnace for drying and calcinati...

Embodiment 3

[0033] Select a honeycomb-shaped SCR denitration catalyst monomer after one-time calcination and code it as 3#, and measure its V by XRF 2 o 5 The content is 0.51%. If designing a single V 2 o 5 The content is adjusted to 1.90%, the pore volume of the monomer is measured to be 0.31cm3 / g, and the formula 1 is used to calculate the V 2 o 5 Concentration of (1.90-0.51) * 10 / 0.31 = 44.48g / l impregnating liquid. Configure impregnating liquid 400KG, use a spectrophotometer to detect its concentration as 43.94g / l. Continue to completely impregnate the monomer in the impregnating For 30 minutes in the liquid, use a pump to keep the impregnating liquid flowing slowly and continuously through the pores of the monomer. The monomer was taken out, and the remaining impregnating solution on the surface of the catalyst was filtered. The impregnated monomer is put into a drying furnace and a calcination furnace for drying and calcination. Take out the calcined monomer, and use XRF to m...

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Abstract

The invention discloses a preparation method of high-vanadium honeycomb type SCR denitration catalyst. The preparation method comprises the following steps: sampling, detecting the content of V2O5 before and after preparation, detecting pore volume, working out the concentration of steeping fluid, preparing steeping fluid, and steeping in catalyst. According to the invention, the content of V2O5 on the inner wall is detected through the catalyst, and the high-vanadium honeycomb type SCR denitration catalyst can be prepared by adding effective components of the catalyst in a steeping manner repeatedly and quantitatively; after the method is adopted, the detection method is further simplified, so that the preparation process is optimized, and the efficiency is improved.

Description

technical field [0001] The invention belongs to catalyst design and preparation methods, in particular to a preparation method of a high-vanadium-content honeycomb SCR denitration catalyst, and in particular to a preparation method of a high-vanadium-content honeycomb SCR denitration catalyst that can be measured repeatedly and accurately. Background technique [0002] In recent years, the SCR selective reduction denitrification system has been selected for denitrification treatment of power plant tail gas. Most of the SCR selective reduction and denitrification systems nowadays use V 2 o 5 The metal oxide catalyst of the V-Ti-W system constructed by the main active ingredient. Therefore, the loading of the main active substances and co-catalysts on the monomer plays a vital role in the exhaust gas purification effect and catalytic efficiency. [0003] The traditional process uses the equal volume method to complete the catalyst production through one batching, kneading, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22B01J37/02B01D53/90B01D53/56
Inventor 廖新李晓勇刘忠彬郑鸥
Owner CHENGDU DONGFANG KWH ENVIRONMENTAL PROTECTION CATALYSTS
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