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Metallic oxide mixture catalyzer for purifying organic waste gas and method of preparing the same

A technology for organic waste gas and oxides, applied in the direction of metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as complicated procedures and very thin preparations, and achieve The effect of simple preparation process, simple manufacturing equipment, and simplified economy

Active Publication Date: 2010-06-23
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To improve this stability, Al 2 o 3 Precursor water solubles, that is, slurry, are generally prepared very thinly, and have to be coated and dried many times, and the process is complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Measure 100 ml of 10% nitric acid solution, heat it with an induction cooker and boil it. Take a size of 30mm (diameter) * 50mm (height) cordierite ceramic honeycomb with a specification of 300 holes / inch 2 (47 holes / cm 2), weighed 29.1801 grams, put it into the boiled nitric acid solution, and continued to heat for 3 hours. The cordierite honeycomb ceramic was taken out, rinsed with pure water until its pH=6-7, dried in air at 200° C. for 2 hours, and then allowed to cool naturally.

[0031] Weigh 1.0213 g of alumina sol with a purity of 60%, add 7 ml of pure water, and stir to dissolve the alumina sol completely. In addition, 2.1686 grams, 2.6102 grams and 1.3061 grams of Cu(NO) with a purity of 98% were weighed respectively. 3 ) 2 , Ni(NO 3 ) 2 and Co(CH 3 COO) 2 , 1.5294 grams of 50% pure Mn (NO 3 ) 4 , dissolve and stir until a mixed salt solution A is formed uniformly.

[0032] Then weigh 0.2366 g, 0.0623 g and 0.0102 g of cerium lanthanum zirconium pr...

Embodiment 2

[0038] Weigh the honeycomb ceramic carrier with the specifications described in Example 1, its weight is 30.0988 grams, and carry out nitric acid strengthening pretreatment according to the conditions and steps of Example 1.

[0039] Weigh 2.6336 grams of alumina sol with a purity of 60%, add 7 ml of pure water, and stir to dissolve the alumina sol completely. In addition, 1.8349 grams, 1.4724 grams and 0.7368 grams of Cu(NO) with a purity of 98% were weighed respectively. 3 ) 2 , Ni(NO 3 ) 2 and Co(CH 3 COO) 2 , 0.8628 g of 50% Mn (NO 3 ) 4 , dissolve and stir until a mixed salt solution A is formed uniformly. Then weigh 0.7322 g, 0.2357 g and 0.0342 g of cerium lanthanum zirconium precursor Ce(NO 3 ) 3 ·6H 2 O, La㈩O 3 ) 3 ·6H 2 and ZrO(N0 3 ) 2 ·2H 2 O; the aluminum glue and the mixed salt of cerium, lanthanum and zirconium are respectively dissolved and then mixed to form a coating slurry B, and finally the mixed salt solution A and the coating slurry B are ...

Embodiment 3

[0045] Weigh the honeycomb ceramic carrier with the specifications described in Example 1, its weight is 30.2645 grams, and carry out nitric acid strengthening pretreatment according to the conditions and steps of Example 1.

[0046] Weigh 3.1778 grams of alumina sol with a purity of 60%, add 7 ml of pure water, and stir to dissolve the alumina sol completely. In addition, 1.7122 grams, 2.0608 grams and 1.5469 grams of Cu(NO) with a purity of 98% were weighed respectively. 3 ) 2 , Ni(NO 3 ) 2 and Co(CH 3 COO) 2 , 1.2076 grams of 50% pure Mn (NO 3 ) 4 , dissolve and stir until a mixed salt solution A is formed uniformly. Then weigh 0.4786 g, 0.1401 g and 0.0447 g of the cerium lanthanum zirconium precursor Ce(NO 3 ) 3 ·6H 2 O, La (NO 3 ) 3 ·6H 2 O and ZrO (NO 3 ) 2 ·2H 2 O; the aluminum glue and the mixed salt of cerium, lanthanum and zirconium are respectively dissolved and then mixed to form a coating slurry B, and finally the mixed salt solution A and the coa...

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Abstract

The present invention relates to a catalyst of a metal oxide compound used for organic exhaust gas purification, and a preparation method for the catalyst. The catalyst uses the cordierite honeycomb ceramic intensively pretreated with the nitric acid as a carrier, and an active aluminum oxide coating modified by a mixed oxide of cerium, lanthanum and zirconium, and an active component comprising a plurality of metallic oxide mixtures are loaded on the carrier in a lump. For the catalyst preparation method, heat treatment is conducted on the carrier with the nitric acid, the concentration of which is 5 to 15 percent; after a specific surface area of the carrier is increased, the coating, which comprises and is loaded with the mixed oxide active component, is immersed in a lump. The catalyst is provided with the large specific surface area. The active component is a transition metal oxide mixture, which comprises no noble metal. Moreover, the catalyst is provided with the excellent performance and the low cost, and can be spread and applied easily. The catalyst is provided with the high catalytic combustion efficiency for the organic exhaust gas comprising benzene, toluene, dimethybenzene, polycyclic aromatic hydrocarbon and so on, and the ignition temperature is low. Thus, the catalyst is widely applicable for purification of the industrial organic exhaust gas. The technique ofone-time immersion, drying and calcination is adopted, so the manufacture equipment needed is simple.

Description

technical field [0001] The invention relates to a catalyst for purifying organic waste gas and a preparation method thereof, in particular to a metal oxide mixture catalyst for purifying organic waste gas and a preparation method thereof. Background technique [0002] Organic waste gas discharged from industry is one of the main sources of air pollution. For example, the organic waste gas discharged from enameled wire production contains benzene, toluene, xylene and polycyclic aromatic hydrocarbons, etc.; Contains trimethylbenzene and tetramethylbenzene. If these waste gases are directly discharged without treatment, they will cause great harm to human health. At present, the treatment methods used for these organic waste gases include absorption method, thermal combustion method and catalytic combustion method. Among them, the catalytic combustion method can obtain a good purification effect in the treatment of organic waste gas, so it has been widely used. [0003] Most...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889B01D53/44
Inventor 叶代启付名利关绣娟
Owner SOUTH CHINA UNIV OF TECH