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Method for preparing nitrous oxides selectivity reduction catalyst on metal alloy carrier

A metal alloy, nitrogen oxide technology, applied in the field of nitrogen oxide selective reduction catalyst, can solve the problems of high light-off temperature and poor purification effect, and achieve low light-off temperature, high conversion efficiency, high and low temperature light-off characteristics Effect

Inactive Publication Date: 2011-08-17
CHANGCHUN JLU KENUO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of the invention can solve the problems of high light-off temperature and poor purification effect of the SCR (Selective Catalytic Reduction) catalyst of the current diesel vehicle

Method used

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  • Method for preparing nitrous oxides selectivity reduction catalyst on metal alloy carrier
  • Method for preparing nitrous oxides selectivity reduction catalyst on metal alloy carrier
  • Method for preparing nitrous oxides selectivity reduction catalyst on metal alloy carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Mix ammonia water with a mass concentration of 25%, hydrogen peroxide with a mass concentration of 30%, and deionized water at a volume ratio of 1:2:6, completely immerse the metal alloy carrier in the mixed solution, ultrasonically clean for 1 hour, and then dry ; then the mass concentration is 35% hydrochloric acid, mass concentration is 30% hydrogen peroxide and deionized water are mixed in a volume ratio of 1: 2: 6, the carrier is completely immersed in the mixed solution, the pickling time is 5 minutes, and then Drying; immerse the pickled metal alloy carrier completely in deionized water, and ultrasonically clean it for 1 hour to remove residual acid ions on the surface, and then dry; finally, completely immerse the above metal alloy carrier in absolute ethanol, and ultrasonically clean 1 hour, then dry. Burn at 800°C for 2 hours and cool at room temperature.

[0040] The nitrates of each substance in the sol-gel solution and distilled water are prepared into a m...

Embodiment 2

[0043] Mix ammonia water with a mass concentration of 25%, hydrogen peroxide with a mass concentration of 30%, and deionized water at a volume ratio of 1:2:6, completely immerse the metal alloy carrier in the mixed solution, ultrasonically clean for 1 hour, and then dry ; then the mass concentration is 35% hydrochloric acid, mass concentration is 30% hydrogen peroxide and deionized water are mixed in a volume ratio of 1: 2: 6, the carrier is completely immersed in the mixed solution, the pickling time is 5 minutes, and then Drying; immerse the pickled metal alloy carrier completely in deionized water, and ultrasonically clean it for 1 hour to remove residual acid ions on the surface, and then dry; finally, completely immerse the above metal alloy carrier in absolute ethanol, and ultrasonically clean 1 hour, then dry. Burn at 900°C for 2 hours and cool at room temperature.

[0044] The nitrates of each substance in the sol-gel solution and distilled water are prepared into a m...

Embodiment 3

[0047] Mix ammonia water with a mass concentration of 25%, hydrogen peroxide with a mass concentration of 30%, and deionized water at a volume ratio of 1:2:6, completely immerse the metal alloy carrier in the mixed solution, ultrasonically clean for 1 hour, and then dry ; then the mass concentration is 35% hydrochloric acid, mass concentration is 30% hydrogen peroxide and deionized water are mixed in a volume ratio of 1: 2: 6, the carrier is completely immersed in the mixed solution, the pickling time is 5 minutes, and then Drying; immerse the pickled metal alloy carrier completely in deionized water, and ultrasonically clean it for 1 hour to remove residual acid ions on the surface, and then dry; finally, completely immerse the above metal alloy carrier in absolute ethanol, and ultrasonically clean 1 hour, then dry. Burn at 900°C for 1 hour and cool at room temperature.

[0048] The nitrates of each substance in the sol-gel solution and distilled water are prepared into a mi...

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Abstract

The invention belongs to a field of diesel-engined car tail gas cleaning and relates to a method for preparing a catalyst with optimized performance on metal alloy support for selectively reducing nitrogen oxide. The method includes preparing nickel nitrate solution, manganese nitrate solution, copper nitrate solution, cobalt nitrate solution, ferric nitrate solution, cerium nitrate solution and chromium nitrate solution with the distilled water as solvent; selecting 2-4 kinds of solutions from the solutions and mixing with silver nitrate solution or palladium nitrate of equivalent volume to prepare catalyst solution; dip-coating the catalyst solution on a glass ceramic coating of metal alloy support by; air-drying the coated metal carrier at room temperature; drying at 120-180 DEG C; repeating the coating and the drying for 5-8 times; and calcining at 600-1,000 DEG C for 1-5h to activate and mold. The method has the advantages of low cost, good initiation and catalytic characteristiceffect.

Description

technical field [0001] The invention belongs to the field of diesel vehicle exhaust purification, and relates to a method for preparing a performance-optimized nitrogen oxide selective reduction catalyst on a metal alloy carrier Background technique [0002] With the air pollution becoming more and more serious, the environmental protection in the world has attracted people's great attention. The control technology of diesel vehicle exhaust pollution is an important environmental problem that must be solved to prevent air pollution. Pollutant NO emitted by diesel vehicles X It is a harmful gas that seriously pollutes the atmospheric environment. It can form photochemical smog under light induction, endanger the human respiratory system, destroy the high-altitude ozone layer, and is also one of the important causes of acid rain. Therefore, for NO in diesel vehicles X Catalytic purification is a hot spot in the research of motor vehicle exhaust purification. As the most pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89B01D53/94B01D53/56
Inventor 韩炜王婧姝牛晓巍华伦郭淑丽张典齐智国刘光辉
Owner CHANGCHUN JLU KENUO TECH CO LTD
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