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Water-resistant sulfur-resistant flue gas denitrification powder catalyst, preparation method and application of flue gas denitrification powder catalyst

A technology of catalyst and denitration powder, which is applied in the field of catalyst preparation, can solve the problems of poor stability and low denitrification efficiency, achieve good hydrophobicity, improve water and sulfur resistance stability, and excellent water and sulfur resistance performance

Active Publication Date: 2016-01-06
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] According to the existing anti-SO of low temperature denitrification catalyst 2 and H 2 O the problem of low denitrification efficiency and poor stability, the object of the present invention is to provide a water-resistant and sulfur-resistant low-temperature flue gas denitrification powder catalyst, preparation method and application thereof, and the catalyst is guaranteed to have high denitrification activity. , has good water and sulfur resistance stability

Method used

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  • Water-resistant sulfur-resistant flue gas denitrification powder catalyst, preparation method and application of flue gas denitrification powder catalyst
  • Water-resistant sulfur-resistant flue gas denitrification powder catalyst, preparation method and application of flue gas denitrification powder catalyst
  • Water-resistant sulfur-resistant flue gas denitrification powder catalyst, preparation method and application of flue gas denitrification powder catalyst

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Experimental program
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Effect test

Embodiment 1

[0073] (1) Configure titanyl sulfate, manganese nitrate, copper nitrate, nickel nitrate, cerium nitrate solution and 10wt% sodium carbonate solution, mix titanyl sulfate, manganese nitrate, copper nitrate, nickel nitrate and cerium nitrate solution evenly to obtain a mixed solution , control the molar ratio of Ti, Mn, Cu, Ni, Ce in the mixed solution to be 1:0.4:0.2:0.02:0.1. In a constant temperature water bath at 25°C, add the above-mentioned mixture of titanium, manganese, copper, nickel, and cerium salts dropwise with sodium carbonate solution to completely precipitate titanium, manganese, copper, nickel, and cerium ions. 3h, filter and wash, dry at 110°C for 5h, and bake at 500°C for 5h.

[0074] Weigh the titanium-manganese-copper-nickel-cerium catalyst synthesized by the co-precipitation method, place it in a round-bottomed flask, and then weigh a certain amount of tetraethyl orthosilicate, the quality of tetraethyl orthosilicate being 0.1% of the mass of the catalyst. ...

Embodiment 2

[0076] (1) configure titanyl sulfate, manganese nitrate, ferric nitrate, copper nitrate, zirconium oxychloride, cerium nitrate solution and 10wt% sodium carbonate solution; , cerium nitrate solution mixed evenly to obtain a mixed solution, control the molar ratio of the six elements Ti, Mn, Fe, Cu, Zr and Ce in the mixed solution to be 1:0.2:0.1:0.2:0.01:0.1; in a constant temperature water bath at 25°C , add the above-mentioned titanium manganese iron copper zirconium cerium salt mixture dropwise with sodium carbonate solution to completely precipitate titanium, manganese, iron, copper, zirconium and cerium ions. Filter and wash, dry at 110°C for 5h, and bake at 500°C for 5h.

[0077] Weigh the titanium manganese iron copper zirconium cerium catalyst synthesized by co-precipitation method, put it in a round bottom flask, then weigh a certain amount of tetraethyl orthosilicate, the tetraethyl orthosilicate mass accounts for 2.5% of the catalyst. It was dissolved in the organi...

Embodiment 3

[0079] (1) configure titanyl sulfate, manganese acetate, ferric nitrate, copper nitrate, zirconium oxychloride, cobalt nitrate solution and 10wt% sodium carbonate solution; and cobalt nitrate to obtain a mixed solution, and control the molar ratio of Ti, Mn, Fe, Cu, Zr, and Co in the mixed solution to 1:0.3:0.01:0.1:0.1:0.1; in a constant temperature water bath at 25°C , add dropwise the above-mentioned titanium manganese iron copper zirconium cobalt salt mixed solution with sodium carbonate solution to completely precipitate titanium, manganese, iron, copper, zirconium and cobalt ions, control pH=9~11 after dropping, stir for 3h Filter and wash, dry at 110°C for 5h, and bake at 500°C for 5h.

[0080] Weigh the titanium manganese iron copper zirconium cobalt catalyst synthesized by the co-precipitation method, put it in a round bottom flask, and then weigh a certain amount of simethicone oil, the mass of simethicone oil accounts for 6.5% of the catalyst. It was dissolved in t...

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Abstract

The invention relates to a water-resistant sulfur-resistant flue gas denitrification powder catalyst, a preparation method and an application of the flue gas denitrification powder catalyst. The catalyst comprises main components including titanium dioxide, manganese oxide and auxiliaries, wherein the auxiliaries are two of or a combination of more than two of zirconium oxide, copper oxide, molybdenum oxide, cerium oxide, iron oxide, nickel oxide, cobalt oxide, niobium oxide and tungsten oxide; the mole ratio of Mn to Ti is 0.01-1.0, and the mole ratio of metal in the auxiliaries to titanium metal elements is 0.01-1.0. The catalyst is covered with one silicon dioxide coating or more silicon dioxide coatings. The catalyst is prepared with a coprecipitation method, can be used for an NH3-SCR (selective catalytic reduction) purification process of nitric oxide in flue gas in a fixed source or a moving source, adopts non-toxic and harmless raw materials and has the advantages that the preparation method is simple and convenient, the catalytic activity is high, the active window is wide, the water-resistant and sulfur-resistant stability is good, environment protection is realized and the like.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a water-resistant and sulfur-resistant flue gas denitrification powder catalyst, a preparation method and an application thereof. Background technique [0002] With the development of my country's economy, the energy consumption, especially the consumption of fossil energy, has increased significantly. Correspondingly, the degree of air pollution is also increasing day by day, and the energy structure dominated by coal is the main factor affecting the quality of my country's air environment. At present, more than 95% of thermal power plants in my country are mainly coal-fired, and it is difficult to change in the short term. Sulfur dioxide, carbon dioxide, nitrogen oxides and dust emitted during coal combustion account for 87%, 71%, 67% and 60% of my country's emissions, respectively. my country's energy consumption accounts for 8% to 9% of the world's ...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01D53/86B01D53/56
Inventor 张鑫陈志坤吕一品高金森
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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