Micropore ceramic catalyst and preparation method thereof

A technology of microporous ceramics and catalysts, applied in the field of microporous ceramic catalysts and their preparation, can solve the problems of high proportion of PM2.5, difficult filtration, large gaps, etc., and achieve the effect of high SCR catalytic activity

Active Publication Date: 2015-04-29
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large gaps between ordinary filter fibers, it is difficult to filter fine particles (PM2.5, PM10) with small particle sizes.
Although my country has not yet tested the PM2.5 emissions of cement enterprises, Gore in the United States found that PM2.5 accounts for a very high proportion of the total dust in the study

Method used

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  • Micropore ceramic catalyst and preparation method thereof
  • Micropore ceramic catalyst and preparation method thereof

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preparation example Construction

[0037] see figure 1 , a preparation method of microporous ceramic catalyst, comprising the following steps:

[0038] S101: Preparation of Microporous Ceramic Matrix

[0039] Select SiC, SiO 2 、Al 2 o 3 At least one of the materials is aggregate, then doped with a binder and a pore-forming agent, and prepared into a plate-type microporous ceramic through sintering to obtain a microporous ceramic matrix;

[0040] S102: TiO 2 coating preparation

[0041] Tetrabutyl titanate Ti(OC 4 o 9 ) 4 As raw material, ethanol as solvent, acetylacetone as complexing agent to prepare TiO 2 Sol, TiO prepared on microporous ceramic surfaces by the LBL (layer-by-layer self-assembly) method 2 Coating, drying and calcining to obtain a microporous SCR catalyst carrier;

[0042] S103: SCR catalyst active component loading

[0043] The catalyst active component is supported on the surface of the microporous SCR carrier by the solution impregnation method to obtain a microporous ceramic loa...

Embodiment 1

[0049] A preparation method of microporous ceramic catalyst: comprising the following steps:

[0050] (1) Preparation of microporous ceramic matrix

[0051] SiC:SiO with a mass ratio of 1:1:1 2 :Al 2 o 3 The mixture is aggregate, doped with sodium hydroxymethylcellulose (accounting for 1% of the total mass of the aggregate), oleic acid (accounting for 3% of the total mass of the aggregate), monoethanolamine (accounting for 1% of the total mass of the aggregate), Carbon black and methyl methacrylate-styrene copolymer (accounting for 8% of the total aggregate mass, carbon black: methyl methacrylate-styrene copolymer = 1:1) or sintered at 1150 ° C to prepare a plate Microporous ceramics, obtaining a microporous ceramic matrix;

[0052] (2)TiO 2 coating preparation

[0053] Weigh tetrabutyl titanate Ti(OC 4 o 9 ) 4 , ethanol as a solvent, the molar ratio of ethanol to tetrabutyl titanate is 9:1, add complexing agent acetylacetone (the molar ratio of acetylacetone: tetrabu...

Embodiment 2

[0059] (1) Preparation of microporous ceramic matrix

[0060] Select SiC as the aggregate, doped with silicone (accounting for 2% of the total mass of the aggregate), oleic acid (accounting for 3% of the total mass of the aggregate), carbon black and polystyrene microspheres (accounting for 5% of the total mass of the aggregate, Carbon black: polystyrene microsphere mass ratio = 3:1), after sintering at a high temperature of 1000 ° C, it is prepared into plate-type microporous ceramics, and a microporous ceramic matrix is ​​obtained;

[0061] (2)TiO 2 coating preparation

[0062] Tetrabutyl titanate Ti(OC 4 o 9 ) 4 As a raw material, a mixture of ethanol and water is used as a solvent (solvent: tetrabutyl titanate molar ratio=6:1, and the volume ratio of ethanol and water is 8:1), and acetylacetone is used as a complexing agent (acetylacetone: titanic acid Tetrabutyl molar ratio=1:1), and inhibitor citric acid solution (citric acid: tetrabutyl titanate molar ratio=1:5), p...

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PUM

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Abstract

The invention discloses a micropore ceramic catalyst and a preparation method thereof. The micropore ceramic catalyst takes at least one material of SiC, SiO2 and Al2O3 as an aggregate to prepare a microporous ceramic substrate, a TiO2 coating is prepared through a sol-gel method, and MnOx-CeO2 is loaded as a catalyst active component through a dipping or spraying way. The preparation method provided by the invention comprises the following steps: (1), preparing the microporous ceramic substrate; (2), preparing the TiO2 coating; (3), loading the SCR catalyst active component; (4), roasting the catalyst. The catalyst provided by the invention can be mounted behind a dirt catcher at the tail end of a cement kiln, can be used for effectively removing fine particles in flue gas, and has relatively high SCR catalytic activity.

Description

technical field [0001] The invention relates to the field of emission reduction of air pollutants in the cement industry, in particular to a microporous ceramic catalyst and a preparation method thereof. Background technique [0002] With the expansion of industrial production scale and the rapid expansion of the number of motor vehicles, fine particulate matter (PM2.5), nitrogen oxides (NO x ) and other air pollutants are increasing year by year, and the impact on ecology and the environment is becoming more and more obvious. The issue of air pollution control has become one of the nationally focused issues. Air pollutants such as PM2.5 and NOx mainly come from fossil fuel combustion, grinding, transportation and other processes, and the main emission industries include coal-fired power plants, cement industry, metallurgical industry, etc. In order to achieve emission reduction goals and meet environmental protection requirements, various industries have also upgraded thei...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/224B01D49/00B01D53/86B01D53/56
Inventor 房晶瑞汪澜
Owner CHINA BUILDING MATERIALS ACAD
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