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NiO hollow sphere catalyst for catalyzing N2O to directly decompose as well as preparation method and application of NiO hollow sphere catalyst

A technology of hollow spheres and catalysts, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, separation methods, etc., can solve the problems of low activity, achieve the effects of promoting adsorption, good application prospects, and avoiding complicated steps

Inactive Publication Date: 2017-12-22
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For the current traditional transition metal oxide catalysts to N 2 The problem that the activity of O catalytic decomposition is low, the object of the present invention is to provide a kind of to N 2 Catalyzed decomposition of O with high efficiency oxide catalyst and preparation method thereof

Method used

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  • NiO hollow sphere catalyst for catalyzing N2O to directly decompose as well as preparation method and application of NiO hollow sphere catalyst
  • NiO hollow sphere catalyst for catalyzing N2O to directly decompose as well as preparation method and application of NiO hollow sphere catalyst
  • NiO hollow sphere catalyst for catalyzing N2O to directly decompose as well as preparation method and application of NiO hollow sphere catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] a) Take 10ml of 0.5mol / L nickel nitrate solution, 20ml of 1mol / L glycine solution and 15ml of 1mol / L sodium sulfate solution, add deionized water, add 10ml of 4mol / L hydroxide dropwise under stirring at room temperature Sodium solution, forming a blue transparent solution;

[0023] b) Stirring the blue transparent solution obtained in step a) in a water bath at 40°C for 30 minutes, transferring the resulting mixed solution to a hydrothermal reaction kettle, performing a hydrothermal reaction at 180°C for 24 hours, and then cooling down to room temperature;

[0024] c) The reaction solution obtained in step b) was suction filtered, washed, dried at 120°C for 12 hours, and then calcined in a muffle furnace at 400°C for 4 hours to prepare a NiO hollow sphere catalyst.

Embodiment 2

[0026] a) Take 10ml 1mol / L nickel nitrate solution, 10ml 2mol / L glycine solution and 15ml 2mol / L sodium sulfate solution, add deionized water, add 60ml 2mol / L sodium hydroxide drop by drop under stirring at room temperature solution, forming a blue transparent solution;

[0027] b) Stirring the blue transparent solution obtained in step a) in a water bath at 20°C for 90 minutes, transferring the resulting mixture to a hydrothermal reaction kettle, performing a hydrothermal reaction at 140°C for 36 hours, and then cooling down to room temperature;

[0028] c) The reaction solution obtained in step b) was suction filtered, washed, dried at 120°C for 24 hours, and then calcined in a muffle furnace at 350°C for 8 hours to prepare a NiO hollow sphere catalyst.

Embodiment 3

[0030] a) Take 10ml 1mol / L nickel nitrate solution, 25ml 2mol / L glycine solution and 30ml 2mol / L sodium sulfate solution, add deionized water, add 50ml 2mol / L sodium hydroxide drop by drop under stirring at room temperature solution, forming a blue transparent solution;

[0031] b) Stirring the blue transparent solution obtained in step a) in a 30°C water bath for 60 minutes, transferring the resulting mixed solution to a hydrothermal reaction kettle, performing a hydrothermal reaction at 160°C for 30 hours, and then cooling down to room temperature;

[0032] c) The reaction solution obtained in step b) was suction filtered, washed, dried at 120°C for 24 hours, and then calcined in a muffle furnace at 500°C for 4 hours to prepare a NiO hollow sphere catalyst.

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Abstract

The invention relates to a NiO hollow sphere catalyst for catalyzing N2O to directly decompose as well as a preparation method and application of the NiO hollow sphere catalyst, belonging to the technical field of environmental catalysis. The NiO hollow sphere catalyst is prepared by using a hydrothermal method, and has good activity when being used for enabling the greenhouse gas N2O to be directly decomposed into N2 and O2; when the space velocity is 120,000h<-1>, the N2O can be completely decomposed by means of catalysis at the temperature of 350 DEG C; furthermore, the O2 seldom affects the activity of the catalyst. The NiO hollow sphere catalyst prepared by the method can be used for purifying the tail gas produced in the production of chemical products such as nitric acid as well as the N2O discharged from the tail gas of motor vehicles, thus having wide application prospects.

Description

technical field [0001] The invention relates to a highly efficient catalytic N 2 The NiO hollow sphere directly decomposed by O and its preparation and application, the catalyst can be used to purify the tail gas in the production of chemical products such as nitric acid and the N emitted in the exhaust gas of motor vehicles 2 O, belongs to the field of environmental catalysis technology. Background technique [0002] N 2 As a typical greenhouse gas, O has a global warming potential (GWP) of CO 2 310 times; in addition, N 2 The average lifetime of O is about 150 years, and it has a serious damage effect on the ozone layer in the troposphere. [0003] The production of industrial adipic acid, nitric acid and fertilizers, as well as the treatment of motor vehicle exhaust (such as the use of three-way catalysts) will produce N 2 O. With the development of industry, N 2 The concentration of O is increasing year by year. Therefore, how to effectively control and eliminate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J37/10B01J37/08B01J35/08B01D53/86B01D53/56C01G53/04
CPCB01D53/8628C01G53/04B01J23/755B01J37/088B01J37/10B01D2257/402B01D2258/01C01P2004/34C01P2004/04C01P2004/03C01P2004/61B01J35/397B01J35/40B01J35/51Y02C20/10
Inventor 刘志明王猛何芳周子正
Owner BEIJING UNIV OF CHEM TECH
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