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Non-noble metal composite oxide catalyst as well as preparation method and application thereof

A technology of composite oxides and non-noble metals, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of expensive precious metals and reduce treatment costs , increase the site area, and the effect of efficient oxidation reaction

Pending Publication Date: 2022-06-14
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst uses expensive precious metals and is not suitable for stationary source flue gas treatment applications with huge flue gas emissions

Method used

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  • Non-noble metal composite oxide catalyst as well as preparation method and application thereof
  • Non-noble metal composite oxide catalyst as well as preparation method and application thereof
  • Non-noble metal composite oxide catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 16

[0080] Example 1 6.4%CuO-8.5%WO 3 / CeO 2 Catalyst preparation and activity evaluation

[0081] Take 86.8g cerium nitrate Ce(NO 3 ) 3 ·6H 2 O and 180g urea were placed in a beaker, and deionized water was added to dissolve to make a 2L mixed solution. The mixed solution was heated to boiling under stirring conditions (500 rpm). After boiling for a certain period of time, the solution became cloudy and precipitated. After stirring for 2 hours under the boiling state, the obtained mixture was subjected to suction filtration to separate the precipitate from the mother liquor; the precipitate was washed twice with deionized water, and finally the filter cake was drained and transferred to an oven, and dried at 100 ° C for 15 hours , and then put it in a muffle furnace, calcined at 500 °C for 2 hours to obtain CeO 2 powder.

[0082] Preparation of 6.4%CuO-8.5%WO by Impregnation Method 3 / CeO 2 catalyst. First, 15g CeO was mixed with stirring 2The powder was suspended in ...

Embodiment 2

[0084] Example 2 6.3%CuO-9.3%Cr 2 O 3 / Ce 0.5 Zr 0.5 O 2 Catalyst preparation and activity evaluation

[0085] Take 54.8g cerium ammonium nitrate (NH 4 ) 2 Ce(NO 3 ) 6 , 100ml of 1M zirconium nitrate solution and 180g of urea were placed in a beaker, and deionized water was added to dissolve to make a 2L mixed solution. The mixed solution was heated to boiling under stirring conditions (500 rpm). After boiling for a certain period of time, the solution became cloudy and precipitated. After stirring for 2 hours under the boiling state, the obtained mixture was subjected to suction filtration to separate the precipitation from the mother liquor; the precipitation was washed twice with deionized water, and finally the filter cake was rinsed with isopropanol and dried, and then transferred to a vacuum oven. Dry at 60°C for 15 hours, then put it in a muffle furnace, and bake at 500°C for 2 hours to obtain Ce with a Ce / Zr molar ratio of 1:1 0.5 Zr 0.5 O 2 powder.

[00...

Embodiment 3

[0088] Example 3 5.4% MnO 2 -8.6%WO 3 / Ce 0.8 Zr 0.2 O 2 Catalyst preparation and activity evaluation

[0089] Weigh 393gZr (NO 3 ) 4 ·3H 2 O is placed in a beaker, and a certain amount of deionized water is added to heat to dissolve, and the volume is adjusted to 1L to obtain a 1M zirconium nitrate solution. Take 87.68g cerium ammonium nitrate (NH 4 ) 2 Ce(NO 3 ) 6 , 40ml of 1M zirconium nitrate solution and 180g of urea were placed in a beaker, and deionized water was added to dissolve to make a 2L mixed solution. The mixed solution was heated to boiling under stirring conditions (500 rpm). After boiling for a certain period of time, the solution became cloudy and precipitated. After stirring for 2 hours under the boiling state, the obtained mixture was subjected to suction filtration to separate the precipitation from the mother liquor; the precipitation was washed twice with deionized water, and finally the filter cake was rinsed with isopropanol and dried, an...

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Abstract

The invention discloses a non-noble metal composite oxide catalyst which is characterized by comprising a first component, a second component and a third component, the first component is selected from at least one of Cr2O3, V2O5, MoO3, WO3 and Nb2O5; the second component is selected from at least one of MnO2, Co2O3, Fe2O3, NiO and CuO; and the third component is selected from at least one of cerium oxide and cerium-zirconium composite oxide. The non-noble metal composite oxide catalyst can simultaneously catalyze the reaction of selectively reducing nitrogen oxide by ammonia and the oxidation reaction of carbon monoxide, so that NO and CO can be simultaneously catalytically eliminated on the same catalytic bed layer, and the removal efficiency can simultaneously reach 90% or above.

Description

technical field [0001] The application relates to a non-precious metal composite oxide catalyst, which belongs to the field of catalysts. Background technique [0002] With the widespread application of flue gas desulfurization and denitrification facilities, the total emissions of SO2 and NOx in flue gas have been effectively controlled. There is a certain concentration of carbon monoxide (CO) in flue gas at the same time. In recent years, the emission of CO in flue gas has been paid more and more attention. As we all know, CO is a toxic gas to humans and animals, and it is very easy to combine with hemoglobin in the blood to weaken the oxygen transport capacity of hemoglobin. CO has an important impact on the atmospheric environment: CO will photochemically react with VOCs and NOx, resulting in the increase of ozone concentration; CO is the most important active substance in the stratosphere. The control gas of OH free radicals can control OH and Almost all trace gases i...

Claims

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Application Information

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IPC IPC(8): B01J23/888B01J23/86B01J23/34B01J23/847B01J23/885B01D53/86B01D53/56
CPCB01J23/888B01J23/868B01J23/34B01J23/8474B01J23/885B01J23/8472B01D53/865
Inventor 程昊王树东张学彬
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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