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Prepn process of multifunctional honeycomb ceramic filter element

A technology of honeycomb ceramics and filter elements, which is applied in the field of functional ceramics preparation technology, can solve the problems of desulfurization agent failure, reduce the strength of ceramics, etc., achieve the effect of low manufacturing cost and improve photocatalytic activity

Inactive Publication Date: 2007-12-19
SHANDONG UNIV OF TECH
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Problems solved by technology

This will not only reduce the strength of the ceramic, but also cause partial failure due to the oxidation of the desulfurizer caused by high temperature sintering. TiO 2 The catalyst will change from an active anatase phase to a nearly inactive rutile phase at temperatures above 700 °C

Method used

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Embodiment Construction

[0014] Step 1. Preparation of honeycomb ceramics: industrial alumina powder with W100 label produced by Shandong Aluminum Plant, kaolin produced in Suzhou with a particle size of no more than 43 μm, and talc powder with a particle size of no more than 43 μm produced by Haicheng Talc Mineral. : 43:43 weight ratio, mixed in turn, squeezed mud, extruded honeycomb ceramic green body after the mud material is stale, dried and kept in a high-temperature furnace at 1390°C for 4 hours to obtain honeycomb ceramics.

[0015] Step 2. TiO 2 / ZnFe 2 o 4 Preparation of mixed sol: Mix acetylacetone: tetrabutyl titanate: dehydrated alcohol with a volume ratio of 0.5:1:4 and stir for 30 minutes, then add the same volume of dehydrated alcohol water and a small amount of nitric acid to adjust the volume of the above mixed solution. The pH value is 2, and then stirred in a constant temperature water bath at 72°C so that the viscosity is 7mPa·S to form a stable titanium dioxide sol; ferric nitra...

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Abstract

The preparation process of multifunctional honeycomb ceramic filter element includes the step of preparing honeycomb ceramic and the step of preparing nanometer photocatalytic desulfurizing film on the honeycomb ceramic. The honeycomb ceramic is prepared with industrial alumina powder, kaolin powder and talcum powder in the weight ratio of 14 to 43 to 43, and through mixing, squeezing, ageing, extruding to form the biscuit, drying and sintering in a high temperature furnace at 1390 deg.c for 4 hr. The honeycomb ceramic filter element is prepared through sol-gel process to prepare TiO2 sol and ZnFe2O4 sol, mixing into stable mixture sol, applying the mixture sol onto honeycomb ceramic, drying, calcining at 500 deg.c for 1 to form one film layer, repeating the applying-drying-calcining process for 3-6 times to prepare the honeycomb ceramic filter element with excellent functions of eliminating harmful gases and desulfurizing.

Description

Technical field [0001] The invention provides a preparation process of a honeycomb ceramic purifier which not only has the function of filtering but also has the function of degrading organic matter and harmful gas, and belongs to the technical field of preparation process of functional ceramics. Background technique [0002] Honeycomb ceramics is a kind of porous functional ceramics, which contains a large number of pores, so it has the characteristics of huge porosity, pore surface area and adjustable pore shape. Therefore, the method of using honeycomb ceramics to remove particulate impurities and harmful and toxic substances is becoming more and more widely used. Honeycomb ceramics are composed of aggregates and binders, which are fired at high temperatures using traditional molding techniques. The honeycomb ceramic filter used to filter automobile exhaust, purify flue gas and purify water, in addition to requiring high strength, good high temperature thermal shock resi...

Claims

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Application Information

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IPC IPC(8): C04B35/16C04B35/622C04B38/00B01J21/06B01J32/00B01J35/04
Inventor 许珂敬
Owner SHANDONG UNIV OF TECH
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