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Honeycomb type cerium-zirconium-tungsten-titanium based denitration catalyst and preparation method thereof

A denitrification catalyst, honeycomb technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, heterogeneous catalyst chemical elements, etc., can solve the problems of secondary pollution, production and use pollution, high cost of recycling and treatment, and achieve The effect of improving catalyst activity, increasing thermal stability and sulfur resistance, and widening the temperature window

Inactive Publication Date: 2016-12-07
无锡市华东电力设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the traditional commercial SCR catalyst is V2O5-WO3 / TiO2 catalyst, using V2O5 as the active component, and V2O5 is a highly toxic oxide, which will cause serious pollution during production and use
At the same time, after the life of the V2O5-WO3 / TiO2 catalyst ends, due to the high cost of recovery and treatment, a large number of recovered catalysts are disposed of by burial, and the highly toxic V2O5 attached to the surface forms a potential secondary pollution to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 50Kg of ammonium metatungstate to deionized water to prepare a 5% ammonium metatungstate aqueous solution; then add 5Kg of citric acid as a solubilizing and dispersing agent to the ammonium metatungstate aqueous solution to obtain a mixed solution, and then Add 950Kg of titanium dioxide to the above mixed solution to obtain a suspension, dry the suspension at 60°C for 12 hours, and roast at 500°C for 6 hours to obtain titanium-tungsten powder for use. Weigh 50Kg of cerium nitrate and 30Kg of zirconium nitrate, add 100Kg of deionized water, dissolve at 80°C as the active component solution for use. Take 600Kg of titanium-tungsten powder prepared above, 2Kg of wood pulp, 35.5Kg of glass fiber, 6.5Kg of scallop powder, 4.2Kg of stearic acid, 9.125Kg of fumed silica, 350Kg of deionized water and put the above active component solution into Mix in a mixer, add ammonia water to the mud during the mixing process, and adjust the pH of the mud to 9.2. Then, put the obtained...

Embodiment 2

[0030] Add 50Kg of ammonium metatungstate to deionized water to prepare a 5% ammonium metatungstate aqueous solution; then add 5Kg of citric acid as a solubilizing and dispersing agent to the ammonium metatungstate aqueous solution to obtain a mixed solution, and then Add 950Kg of titanium dioxide to the above mixed solution to obtain a suspension, dry the suspension at 60°C for 12 hours, and roast at 500°C for 6 hours to obtain titanium-tungsten powder for use. Weigh 50Kg of cerium nitrate and 34.1Kg of zirconium oxychloride, add 105Kg of deionized water, and dissolve at 80°C as the active component solution for later use. Take 600Kg of titanium-tungsten powder prepared above, 2Kg of wood pulp, 35.5Kg of glass fiber, 6.5Kg of scallop powder, 4.2Kg of stearic acid, 9.125Kg of fumed silica, 350Kg of deionized water and put the above active component solution into Mix in a mixer, add ammonia water to the mud during the mixing process, and adjust the pH of the mud to 9.2. Then, ...

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PUM

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Abstract

The invention discloses a honeycomb type cerium-zirconium-tungsten-titanium based denitration catalyst and a preparation method thereof. The honeycomb type cerium-zirconium-tungsten-titanium based denitration catalyst is obtained by the following steps: preparation of titanium-tungsten powder, preparation of an active component solution, preparation of a mud material, filtering and presqueezing, preparation of a denitration mud blank, and calcination. The denitration catalyst has the advantages of better denitration activity, water resistance and sulfur tolerance.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a honeycomb cerium-zirconium-tungsten-titanium-based denitration catalyst and a preparation method thereof. Background technique [0002] my country's coal-fired power plants emit a large amount of nitrogen oxides, and the existence of nitrogen oxides will cause acid rain, photochemical smog, ozone layer holes and other hazards. Therefore, in the face of increasingly stringent nitrogen oxide emission standards, we have developed a Flue gas denitrification technology is of great significance to my country's environmental pollution control. At present, the widely used and mature nitrogen oxide control technology is selective catalytic reduction (SCR) denitrification technology, in which the catalyst cost accounts for 40% to 60% of the total investment of SCR denitrification projects. It can be seen that the catalyst is the core of the SCR denitrification technology an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/30
CPCB01J23/002B01J23/30B01J37/0018B01J37/0236B01J2523/00B01J35/56B01J2523/3712B01J2523/48B01J2523/69
Inventor 丁建峰
Owner 无锡市华东电力设备有限公司
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