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A pb-modified co-oxide matrix n 2 oDecomposition catalyst, its preparation method and application

An oxide and catalyst technology, applied in the field of environmental protection catalytic materials and air pollution control, can solve problems such as poor impurity performance, and achieve the effect of strong tolerance and high catalyst activity

Active Publication Date: 2017-01-18
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] In order to solve the existing N in the prior art 2 O decomposition catalyst against CO 2 and SO 2 The problem of poor impurity performance, the present invention provides a kind of N 2 O decomposition catalyst, not only for N 2 O catalytic decomposition has high activity, and in the catalytic N 2 During the decomposition of O, for CO 2 , SO 2 It has strong tolerance to other impurity gases, and can operate at a lower temperature (around 300°C)

Method used

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  • A pb-modified co-oxide matrix n <sub>2</sub> oDecomposition catalyst, its preparation method and application
  • A pb-modified co-oxide matrix n <sub>2</sub> oDecomposition catalyst, its preparation method and application
  • A pb-modified co-oxide matrix n <sub>2</sub> oDecomposition catalyst, its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0036] 0.40 g of Pb(NO 3 ) 2 and 8.73 g Co(NO 3 ) 2 ·6H 2 O is miscible in 150 mL of distilled water at 40°C. Add 0.5M Na at the same temperature dropwise to the mixture under vigorous stirring 2 CO 3 After the solution reaches pH=9.3, stop adding Na 2 CO 3 The solution was stirred for two hours. Then the obtained precipitate was separated by suction filtration, and the precipitate was repeatedly washed with distilled water until the filtrate was neutral. Finally, the filter cake was dried at 110° C. for 4 hours, and calcined at 500° C. in air for 3 hours. Finally, the obtained powder solids were pressed into tablets and sieved into 20-40 meshes to obtain the S(1) catalyst, and the Pb content was 10 wt.% based on PbO.

Embodiment 2

[0038] Repeat Example 1, but with 0.10 grams of Pb (NO 3 ) 2 Instead of 0.40 gram of Pb(NO 3 ) 2 , to obtain S(2) catalyst. The mass percentage of Pb content calculated as PbO is 2.7wt.%.

Embodiment 3

[0040] Repeat Example 1, but with 0.30 gram of Pb(NO 3 ) 2 Instead of 0.40 gram of Pb(NO 3 ) 2 , to obtain S(3) catalyst. The mass percentage of Pb content calculated as PbO is 7.7wt.%.

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Abstract

The invention relates to a Pb modified Co oxide matrix N2O decomposition catalyst. The Pb modified Co oxide matrix N2O decomposition catalyst is a compound of PbO and Co oxide matrix, and the percentage by weight of PbO in the catalyst is 2.7-21.7wt%. The Pb modified Co oxide matrix N2O decomposition catalyst can be prepared by adopting a coprecipitation method and impregnating the Co oxide matrix with soluble salt solution of Pb. The Pb modified Co oxide matrix N2O decomposition catalyst has high activity on N2O catalytic decomposition and has strong tolerance on foreign gases such as CO2 and SO2 in a N2O catalytic decomposition process; Meanwhile, the Pb modified Co oxide matrix N2O decomposition catalyst can operate at a low temperature (about 300 DEG C) and still can maintain high catalytic activity.

Description

technical field [0001] The present invention relates to a kind of N 2 O decomposition catalysts, especially related to an anti-CO 2 and SO 2 The catalyst for impurities and its preparation method and application belong to the technical fields of environmental protection catalytic materials and air pollution control. Background technique [0002] N 2 O is commonly known as laughing gas. It is produced in large quantities in nitric acid and adipic acid production projects. Hydrocarbon selective catalytic reduction (HC-SCR) and hydrogen selective catalytic reduction (H 2 -SCR) process, will also produce a large amount of N due to the low selectivity of the corresponding catalyst 2 O. N 2 O is a far better than NO x more toxic and far more toxic than CO 2 and CH 4 Gases with a stronger greenhouse effect. In order to protect the atmospheric environment, the N produced in the above process must be 2 O is effectively eliminated. [0003] Effectively eliminate N in the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89B01D53/86B01D53/56
CPCY02C20/10
Inventor 王新平马木提江·吐尔逊于海彪
Owner DALIAN UNIV OF TECH