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

A composite oxide, catalytic combustion technology, used in metal/metal oxide/metal hydroxide catalysts, combustion methods, physical/chemical process catalysts, etc. problems, to achieve good practical significance and economic value, good VOCs adsorption capacity, and the effect of a wide range of sources.

Active Publication Date: 2017-08-04
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the impregnation method is often used to load the catalyst. However, the catalyst prepared by this method is easy to fall off, which affects the stability and service life of the catalyst.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Take 18.9ml 0.1mol / L Co(NO 3 ) 3 Solution and 37.8ml 0.3mol / L Mn(NO 3 ) 2 The solution is prepared as a Co-Mn mixed salt solution for use.

[0040] Weigh 20g of attapulgite, reflux and stir with 6mol / L hydrochloric acid at 40°C for 2h, then wash with deionized water until neutral to obtain modified ATP, dry and ball mill for use.

[0041] In a water bath at 80°C, add 16g of modified ATP to the Co-Mn mixed salt solution while stirring, stir for 3h, then dry in a 110°C oven for 6h, and then bake in a muffle furnace at 500°C for 3h, with a heating rate of 2°C / min, the Co-Mn / ATP powder catalyst was prepared.

[0042] Put the catalyst prepared above into a ball mill, and take it out after ball milling at 300r / min for 2h. Add 0.5g polyvinyl alcohol, 0.4g glycerol, 1g polyethylene glycol and 5g deionized water to the solid after ball milling to make mud, put it into a vacuum mud mixer for refining, knead at 900mbar for 10min, and mix The prepared mud was put into a dark...

Embodiment 2

[0051] According to the molar ratio of Mn and Ce elements 1:2, take 48.1ml of 0.1mol / L Mn(NO 3 ) 2 solution and 48.1ml of 0.2mol / L Ce(NO 3 ) 3 The solution is prepared as a mixed salt solution for use.

[0052] Weigh 20 g of attapulgite, reflux and stir with 3 mol / L hydrochloric acid at 60°C for 1 h, then wash with deionized water until neutral to obtain modified ATP, dry and ball mill for use.

[0053] Add 16 g of treated attapulgite to the mixed salt solution of Mn and Ce while stirring, stir for 4 hours, put it in an oven at 110°C to dry overnight, and then put it in a muffle furnace at 500°C for 3 hours to obtain Mn-Ce / ATP powder catalyst.

[0054] Put the catalyst prepared above into a ball mill, and take it out after ball milling at 300r / min for 2h. Add 0.7g polyvinyl alcohol, 0.4g glycerol, 1.2g polyethylene glycol and 4g deionized water to the solid after ball milling to make mud, put it into a vacuum mud mixer for refining, kneading vacuum degree 800mbar, kneadi...

Embodiment 3

[0061] According to the molar ratio of Cu and Co elements 1:2, pipette 8.9ml of 0.1mol / L Cu(NO 3 ) 2 solution, 8.9ml 0.2mol / L Co(NO 3 ) 2 The solution is prepared as a mixed salt solution for use.

[0062] Weigh 20 g of attapulgite, soak it in 30% nitric acid for 2 hours, wash it with deionized water until neutral to obtain modified ATP, dry it and ball mill it for use.

[0063] While stirring, add 20 g of treated attapulgite to the mixed salt solution of Cu and Co, stir for 4 hours, put it in an oven at 110°C to dry overnight, and then put it in a muffle furnace at 500°C for 3 hours to obtain Cu-Co / ATP powder catalyst.

[0064] Put the catalyst prepared above into a ball mill, and take it out after ball milling at 300r / min for 2h. Add 0.6g polyvinyl alcohol, 1.3g polyethylene glycol, 0.1g hard fatty acid and 5g deionized water to the solid after ball milling to make mud, put it into a vacuum mud mixer for refining, kneading vacuum degree 850mbar, kneading time After 12...

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Abstract

The invention discloses a non-noble metal composite oxide monolithic catalytic combustion catalyst and a preparation method thereof. The preparation method comprises the following steps: preferably selecting soluble salt solutions of more than two of Mg, Ti, Mn, Co, Cu, La, Ce and Zr and loading onto modified attapulgite (ATP); drying and roasting to prepare a composite oxide powder type catalyst; then uniformly grinding the prepared powder type catalyst and adding an additive and water; after sufficiently stirring, mixing, kneading and ageing to obtain plastic mud; and extruding and molding by a mold, cutting, drying and roasting to finally obtain the honeycomb-shaped composite oxide monolithic catalytic combustion catalyst. The catalyst provided by the invention has the advantages of high mechanical strength, good chemical stability, low raw material cost, simple preparation process and the like and has a good removal effect on catalytic combustion of low-concentration organic waste gas, especially alcohols, benzene compounds and carboxylates.

Description

technical field [0001] The invention relates to a non-noble metal composite oxide catalyst, in particular to a non-noble metal composite oxide monolithic catalytic combustion catalyst and a preparation method thereof, as well as the application of the catalyst in VOCs catalytic combustion. Background technique [0002] Volatile organic compounds (VOCs) are a class of chemical substances with high toxicity and serious air pollution effects. VOCs are widely present in the production process and industrial tail gas of petrochemical, smelting, printing and dyeing industries. There are many types and complex components, including more than 300 kinds of compounds, some hydrocarbons, carboxylic acid esters and halogenated hydrocarbon compounds VOCs It is extremely harmful to human health and the ecological environment, so the reduction and elimination of VOCs has become a serious problem that needs to be solved urgently. [0003] According to the nature, concentration, economic be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J23/75B01J23/889B01J35/04F23G7/07
CPCF23G7/07B01J23/002B01J23/34B01J23/75B01J23/8892B01J35/56
Inventor 管国锋孟杰高鹏飞万辉方帆喻家欢
Owner NANJING UNIV OF TECH
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