High-strength manganese oxide granular catalyst and preparation process thereof

A granular catalyst and preparation technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, dispersed particle separation, etc., can solve problems such as catalyst low-temperature poisoning failure, low-temperature flue gas denitrification, etc.

Pending Publication Date: 2021-05-18
NANJING WEIHENG EXPERIMENTAL EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problems of low temperature flue gas denitrification, especially for high humidity, SO 2 In the flue gas environment, there is the problem of catalyst poisoning and

Method used

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  • High-strength manganese oxide granular catalyst and preparation process thereof
  • High-strength manganese oxide granular catalyst and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Take each raw material according to the proportioning ratio, wherein, the quality of manganese carbonate is 500kg, the secondary particle diameter of the manganese carbonate is less than 10 μm, and the surface area is more than 50 μm 2 / g, sulfate radical content in manganese carbonate <1wt%, alkali and alkaline earth metal oxide content <1wt%; Clay is kaolin, quality is 50kg; 30% silica sol quality is 100kg; Organic binder is hydroxypropyl carboxymethyl The base cellulose has a mass of 10 kg; and the inorganic fiber is 30 kg of alkali-free glass fiber chopped strands, with a diameter of 15-30 μm and a length of 3-7 mm.

[0033] (2) Place the above-mentioned manganese carbonate powder and clay raw meal powder weighed in a high-speed mixer, add water and mix at a high speed to obtain a relatively uniform material;

[0034] (3) The above-mentioned obtained material is joined in a strong kneader, and an inorganic binder, an organic binder, and inorganic fibers are adde...

Embodiment 2

[0040] (1) Take each raw material according to the proportioning ratio, wherein the manganese carbonate quality is 300kg, the manganese carbonate secondary particle size is less than 10 μm, and the surface area is more than 50 μm 2 / g, sulfate radical content in manganese carbonate <1wt%, alkali and alkaline earth metal oxide content <1wt%; clay is montmorillonite, quality is 200kg; 30% aluminum sol quality is 150kg; Organic binder is polyvinyl alcohol , the mass is 10 kg; and the inorganic fiber is 10 kg of aluminum silicate fiber, the diameter is 15-30 μm, and the length is 3-7 mm.

[0041] (2) Place the above-mentioned manganese carbonate powder and clay raw meal powder weighed in a high-speed mixer, add water and mix at a high speed to obtain a relatively uniform material;

[0042] (3) the above-mentioned obtained material is joined in a strong kneader, and an organic binder and glass fibers are added to carry out strong kneading to form manganese carbonate mud;

[0043] ...

Embodiment 3

[0048] (1) Take each raw material according to the proportioning ratio, wherein the manganese carbonate quality is 400kg, the manganese carbonate secondary particle size is less than 10 μm, and the surface area is more than 50 μm 2 / g, sulfate radical content<1wt% in manganese carbonate, alkali and alkaline earth metal oxide content<1wt%; Clay is sepiolite, and quality is 150kg; 40% silica sol quality is 150kg; Organic binder is field fine powder , the mass is 15 kg; and the inorganic fiber is 10 kg of alumina fiber, the diameter is 15-30 μm, and the length is 3-7 mm.

[0049] (2) Place the above-mentioned manganese carbonate powder and clay raw meal powder weighed in a high-speed mixer, add water and mix at a high speed to obtain a relatively uniform material;

[0050] (3) the above-mentioned obtained material is joined in a strong kneader, and an organic binder and glass fibers are added to carry out strong kneading to form manganese carbonate mud;

[0051] (4) Put the mang...

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Abstract

The invention discloses a high-strength manganese oxide granular catalyst, which is characterized by comprising the following raw material components by weight: 50-70% of manganese carbonate, 10-30% of clay, 10-20% of an inorganic binder, 1-5% of an organic binder and 3-10% of inorganic fiber. The invention also discloses a preparation process of the high-strength manganese oxide particle catalyst. The process comprises the following steps: selecting a manganese carbonate precursor with special composition requirements, mixing the manganese carbonate precursor with high-surface-area clay, an inorganic binder and water to form a mixture, adding glass fiber and an organic binder into a kneading machine, and carrying out strong kneading to obtain corresponding manganese carbonate pug; and in a two-stage vacuum extruder, carrying out vacuum extrusion and cutting to obtain green body pug particles, and drying and roasting to obtain manganese oxide catalyst particles. The catalyst provided by the invention has excellent denitration efficiency.

Description

technical field [0001] The invention belongs to the technical field of environment-friendly catalytic materials and air pollution control, and more specifically relates to a high-strength manganese oxide particle catalyst and a preparation process thereof. Background technique [0002] Nitrogen oxides (NO x ) is one of the causes of pollutants such as smog and acid rain. Mercury can damage the human nervous system and seriously endanger human health and the ecological environment. Coal-fired power plants and cement plants as NO x The two largest stationary sources of emissions, as well as trace amounts of zero-valent mercury, have become key industries for air pollution control. As the ultra-low emission of pollutants is imperative, the emission limit of nitrogen oxides shall not be higher than 150mg / m 3 , the content of mercury and its compounds shall not exceed 0.05mg / m 3 . At present, the composition of flue gas pollutants emitted by industries such as coal-fired pow...

Claims

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Application Information

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IPC IPC(8): B01J23/34B01J35/02B01D53/86B01D53/56
CPCB01J23/34B01J35/026B01D53/8628B01D2251/2062
Inventor 余剑杨娟李长明许启成
Owner NANJING WEIHENG EXPERIMENTAL EQUIP CO LTD
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