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Honeycombed catalyst for low-temperature denitration and preparation method

A honeycomb catalyst and low-temperature denitrification technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of inability to meet the technical requirements of low-temperature denitrification and the decline in catalytic efficiency, and achieve good acid resistance. Sulfur corrosion performance, increased load capacity and adhesion, and improved activity

Inactive Publication Date: 2015-12-30
海南海控特玻科技有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The relevant provisions of my country's Environmental Protection Law and the environmental protection standards of various industries have gradually increased the requirements for the denitration treatment of industrial boiler combustion flue gas. From the perspective of industrial boilers and flue gas waste heat utilization, there is a huge technical demand space for low-temperature denitrification technology. The catalyst used in the low-temperature denitrification process is the core technology point of the process; the main components of the existing denitrification catalyst are activated carbon, Cu / Mg / Al, CuO / Al 2 o 3 and other components, the effective catalytic reaction temperature is above 300°C, but below 300°C, the catalytic efficiency drops significantly, which cannot meet the technical requirements of low-temperature denitrification; the key

Method used

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  • Honeycombed catalyst for low-temperature denitration and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Carrier activation:

[0021] Weigh 1000g of zeolite powder and dissolve it in a nitric acid solution with a mass fraction of 20%. Dissolve it completely. Use a constant temperature water bath at 80°C to continuously heat and oscillate for 5 hours, then filter out the zeolite powder and wash the zeolite powder with deionized water until The pH value of the washing waste liquid is between 7 and 7.5, and then the zeolite powder is dried by controlling the temperature in an oven at 110°C to obtain activated zeolite powder for use;

[0022] (2) Loading of active ingredients:

[0023] Weigh titanium dioxide, ferric nitrate, and manganese nitrate to be 1250g, 625g, and 250g respectively, add a mixed solution formed by deionized water and 25% ammonia water according to the volume ratio of 1:1, and the usage amount of the mixed solution makes the active components completely Just dissolve; add 250g of the activated zeolite powder prepared in (1) after stirring continuously ...

Embodiment 2

[0027] (1) Carrier activation: the same as in Example 1.

[0028] (2) Active ingredient load: same as Example 1.

[0029] (3) Catalyst molding:

[0030] Weigh the catalyst initial material prepared in (2) 830g， Get stearic acid, methacrylic acid-2-carboxyethyl ester, glass fiber again 51g, 41g, 62g , Mix well to form a mixture, then add deionized water, the amount of deionized water used is to make the above mixture just become muddy. Afterwards, the muddy mixture is subjected to vacuum mud refining, aged under constant temperature and humidity conditions, shaped, dried, and calcined in a tunnel kiln until fully dried to make a honeycomb-shaped new low-temperature denitrification catalyst.

Embodiment 3

[0032] (1) Carrier activation: the same as in Example 1.

[0033] (2) Active ingredient load: same as Example 1.

[0034] (3) Catalyst molding:

[0035] Weigh 830g of the initial catalyst material prepared in (2), and then take stearic acid, 2-carboxyethyl methacrylate, and glass fiber as 60g, 49g, and 65g respectively, and fully mix to form a mixture, and then add deionized water , the amount of deionized water used is to make the above mixture just become muddy. Afterwards, the muddy mixture is subjected to vacuum mud refining, aged under constant temperature and humidity conditions, shaped, dried, and calcined in a tunnel kiln until fully dried to make a honeycomb-shaped new low-temperature denitrification catalyst.

[0036] , sample catalyst experiment and test result calculation

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Abstract

The invention belongs to the technical field of catalyst preparation, discloses a honeycombed catalyst for low-temperature denitration and a preparation method. The honeycombed catalyst for low-temperature denitration comprises components in percentage by weight as follows: 82.29%-88.64% of a catalyst primary material, 3.29%-6.16% of a surfactant, 2.24%-5.08% of a crosslinking agent and 4.28%-6.96% of a reinforcing agent. The catalyst primary material, the surfactant, the crosslinking agent and the reinforcing agent are added to deionized water, and a muddy mixture is formed; the muddy mixture is subjected to mud smelting in vacuum, a product is aged, molded and dried under constant temperature and humidity conditions and calcined in a tunnel kiln until the product is dried sufficiently, and the honeycombed catalyst for low-temperature denitration is prepared. The honeycombed catalyst for low-temperature denitration has higher catalytic activity at the temperature of 180-300 DEG C and has the characteristics of good water resistance, acid and sulfur corrosion resistance capacity, high thermal stability, high catalytic activity, high mechanical strength and large specific surface area.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and discloses a honeycomb catalyst for low-temperature denitrification and a preparation method. Background technique [0002] With the continuous improvement of our country's environmental protection awareness and the further improvement and implementation of the Environmental Protection Law, we have gradually realized that NO in flue gas X Harm to the atmospheric environment and human beings, while NO X It mainly comes from the aerobic combustion of fuel, among which the air-assisted combustion of industrial boilers produces NO X One of the sources, for the NO produced by the combustion of industrial boilers X Governance and the improvement of governance efficiency need to be resolved urgently. The relevant provisions of my country's Environmental Protection Law and the environmental protection standards of various industries have gradually increased the requirements for the den...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01D53/86B01D53/60
Inventor 贺建雄姜宏赵会峰费晓勇谢东恒黄小叶张振华潘国治
Owner 海南海控特玻科技有限公司
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