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Ceramic honeycombed catalyst capable of purifying organic waste gas and preparation method thereof

A ceramic honeycomb, organic waste gas technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. problems, to achieve the effect of prolonging contact time, improving stability and prolonging life.

Inactive Publication Date: 2012-10-31
WUXI WEIFU ENVIRONMENT PROTECTION CATALYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These volatile organic waste gases cause serious pollution to the environment and endanger human health, so they must be purified
[0003] At present, the technical route for the treatment of organic waste gas is mainly incineration, which is divided into direct combustion and catalytic combustion. However, the problems of high energy consumption and incomplete treatment encountered in direct combustion make it rarely used in actual projects. Adoption, catalytic combustion has high removal efficiency and is easy to operate. It is a more commonly used method at present.
[0004] At present, the catalysts used in the catalytic combustion method at home and abroad are mainly divided into two types: precious metal type and composite oxide type. Catalysts are mainly metal oxides such as Cu and Mn. This type of catalyst is cheap and can achieve the effect of a noble metal catalyst under certain conditions. However, this type of catalyst has the obvious disadvantage of poor durability, which also makes this type of catalyst practical. restricted

Method used

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  • Ceramic honeycombed catalyst capable of purifying organic waste gas and preparation method thereof
  • Ceramic honeycombed catalyst capable of purifying organic waste gas and preparation method thereof
  • Ceramic honeycombed catalyst capable of purifying organic waste gas and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1 Ceramic honeycomb catalyst A1 for purifying organic waste gas

[0021] The ceramic honeycomb carrier is a 50-mesh cube with a shape of 100mm*100mm*100mm;

[0022] (1) Preparation of coating slurry: Weigh 3500 grams of deionized water, add 1200 grams of alumina, 600 grams of cerium-zirconium composite oxide (the molar ratio of cerium to zirconium is 3:1), 400 grams of cerium nitrate, and stir. Evenly, until the nitrate is completely dissolved, use a ball mill to ball mill the slurry with a particle size D90 of less than 20 microns, and dropwise add palladium nitrate containing 15% of palladium during stirring to obtain a slurry for coating;

[0023] (2) Coating and drying: After weighing the 300-mesh cordierite honeycomb ceramic carrier with a long axis of 100 mm, a wide axis of 100 mm, a height of 100 mm, and a volume of 1 L, soak it in the coating slurry obtained in step (1) and stay for 1 to 3 s. , take out at a speed of 10~150mm / s; bake the cordierite hone...

Embodiment 2

[0029] Example 2 Ceramic honeycomb catalyst A2 for purifying organic waste gas

[0030] The specific preparation method is basically the same as Example 1 of this part, except that the mesh number of the carrier is 100 meshes. The results of catalyst activity evaluation and bed temperature test are shown in Table 1.

Embodiment 3

[0031] Example 3 Ceramic honeycomb catalyst A3 for purifying organic waste gas

[0032] The specific preparation method is basically the same as that of Example 1 of this part, the difference is that the mesh number of the carrier is 200 meshes. The results of catalyst activity evaluation and bed temperature test are shown in Table 1.

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Abstract

The invention relates to a ceramic honeycombed catalyst capable of purifying organic waste gas and a preparation method of the ceramic honeycombed catalyst, belonging to the technical field of purifying industrial waste gas by a catalytic burning method. According to the ceramic honeycombed catalyst, ceramic honeycomb is taken as a framework shape, and one or several oxides of mixtures of aluminum oxide, cerium oxide and cerium-zirconium melt body and the like is / are taken as a coating; and one or two of Pt and Pd is / are taken as an active component(s). The ceramic honeycombed catalyst has the advantages that the utilized air resistance is small, the contact between exhaust air flow and the surface of the coating is prolonged, the conversion rate of the framework is increased by the ceramic honeycomb carrier, the catalyst cost is lowered effectively, meanwhile, meanwhile, the stability of the catalyst is improved, the changing frequency and the using cost of the catalyst are lowered.

Description

technical field [0001] The invention relates to a ceramic honeycomb catalyst for purifying organic waste gas and a preparation method thereof, belonging to the technical field of purifying industrial waste gas by a catalytic combustion method. Background technique [0002] Organic waste gas refers to organic compounds whose saturated vapor pressure is greater than 70Pa at room temperature and whose boiling point is within 260°C under normal pressure. It is mainly produced in chemical and petroleum waste gas industries, petroleum and chemical product storage tank gas, printing and paint production waste gas, and extraction waste gas. , wood retorting waste gas and pharmaceutical factory waste gas. These volatile organic waste gases cause serious pollution to the environment and endanger human health, and must be purified. [0003] At present, the technical route of organic waste gas treatment is mainly incineration, which is divided into direct combustion and catalytic combu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J35/04B01J23/63F23G7/07
Inventor 曾德智刘洋王刚张辉张杰陈阳董沛泓张徐民王为民邱祎源陆建强盛丽萍张明涛袁芳芳胡芳芳张云贾莉伟褚霞王家明
Owner WUXI WEIFU ENVIRONMENT PROTECTION CATALYST
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