Honeycomb ceramic support and preparation method thereof

A honeycomb ceramic carrier and powder technology, used in ceramic products, catalyst carriers, chemical instruments and methods, etc., can solve the problems of high toxicity and secondary pollution of materials, improve thermal shock resistance, prolong service life, The effect of improving catalytic performance

Active Publication Date: 2019-03-29
CHENGDE RENHE MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, vanadium-titanium system catalysts are commonly used in denitrification systems. This material is highly toxic, so it will cause secondary pollution in the production, use and disposal of waste products.

Method used

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  • Honeycomb ceramic support and preparation method thereof
  • Honeycomb ceramic support and preparation method thereof

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preparation example Construction

[0061] In the preparation method of the illite powder, the natural illite mineral is used as a raw material, and the powder is firstly processed through crushing and grinding. Preferably, the particle size distribution D97 of the powder is 40 μm˜500 μm.

[0062] Preferably, the mass percentage of illite in the natural illite mineral is greater than or equal to 20%.

[0063] After obtaining the powder, activate the powder at 300-500°C, preferably at 410-500°C; then, attach a solution containing functional elements to the activated powder On, illite functional powder is obtained. The solution containing functional elements is attached to the surface or inside of the activated powder.

[0064] Preferably, the solution containing functional elements is attached to the activated powder by spraying or spraying. The functional element is one or more selected from Ce, Pt and Pd. The mass of the functional elements is 0.05%-0.1% of the mass of the illite functional powder.

[0065...

Embodiment 1

[0084] Prepare binder: mix water and methyl cellulose at a mass ratio of 97:3 to obtain a binder. Use after 24 hours.

[0085] Making green body: weigh 10 parts of illite functional powder, Al 2 o 3 43 parts, 19 parts of MgO and 22 parts of water are mixed evenly, and the particle size is 5-11 μm. Then add 1 part of sawdust powder, 0.1 part of aluminum stearate, 0.5 part of tung oil, 0.1 part of glycerin, and 1 part of binder, stir evenly, and press it into a cylindrical shape under 100 MPa, wherein the honeycomb hole is 400 holes / square inch, and the wall thickness 0.15mm. The molded body was dried in a microwave oven at 70°C for 40 minutes.

[0086] Firing the green body: the heating rate is controlled at 3-5°C / min, the temperature is raised to 1345-1355°C and kept at 1345-1355°C for 4 hours to obtain a honeycomb ceramic carrier.

Embodiment 2

[0088] Prepare the binder: mix water and methyl cellulose at a mass ratio of 95:3 to obtain the binder. Use after 24 hours.

[0089] Making green body: weigh 13 parts of illite functional powder, Al 2 o 3 40 parts, 17 parts of MgO and 25 parts of water are mixed evenly, and the particle size is 5-11 μm. Then add 3 parts of wood powder, 0.3 parts of aluminum stearate, 1 part of tung oil, 0.5 parts of glycerin, and 3 parts of binder and stir evenly, and press it into a cylindrical shape under 90 MPa, wherein the honeycomb hole is 400 holes / square inch, and the wall thickness 0.15mm. The molded body was dried in a microwave oven at 80°C for 45 minutes.

[0090] Firing the green body: the heating rate is controlled at 3-5°C / min, the temperature is raised to 1395-1405°C, and the temperature is kept at 1395-1405°C for 3 hours to obtain a honeycomb ceramic carrier.

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Abstract

The invention relates to the field of environmental protection and particularly relates to a honeycomb ceramic support and a preparation method thereof. The honeycomb ceramic support is prepared through burning the following ingredients in parts by weight: 5-30 parts of illite functional powder, 35-50 parts of Al2O3, 10-30 parts of MgO, 0-5 parts of pore former, 0-5 parts of binder, 0-0.5 part ofsurfactant, 0-2 parts of lubricant, 0-1 part of plasticizer and 20-35 parts of water. According to the honeycomb ceramic support and the preparation method thereof, through cooperation among all the ingredients, the disadvantage that the temperature range of burning is narrow is changed, a burning temperature and a coefficient of thermal expansion are reduced, the thermal shock resistance of the honeycomb ceramic support is improved, and the effects of light weight and high strength are achieved. The strength of a denitration catalyst is enhanced, the catalysis performance of the catalyst is improved, the consumption of the catalyst is lowered, the service life of the catalyst is prolonged, and the cost of denitration treatment is reduced.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a honeycomb ceramic carrier and a preparation method thereof. Background technique [0002] With the improvement and strict control of the country's flue gas emission standards, the flue gas must be denitrified. At present, vanadium-titanium system catalysts are commonly used in denitrification systems. This material is highly toxic, so it will cause secondary pollution in the production, use and disposal of waste products. Therefore, a denitrification product using rare elements as a catalyst has emerged, which needs to be coated on a carrier. The improvement of carrier quality can ensure the long-term effectiveness of catalysis to the greatest extent. [0003] This puts forward higher requirements on the catalyst carrier, such as: high positive compressive strength, good coating effect and long service life. Contents of the invention [0004] The technical problem t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/195C04B38/06B01J32/00B01J23/04B01J23/10
CPCC04B35/195C04B38/0006C04B38/0675C04B38/068B01J23/002B01J23/04B01J23/10C04B2235/6562C04B2235/6567C04B2235/9607C04B2235/96C04B2235/3206
Inventor 郎宝龙隋英丹
Owner CHENGDE RENHE MINING CO LTD
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