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Flue gas denitrification powder catalyst as well as preparation method and application thereof

A technology of catalyst and denitrification powder, which is applied in the direction of chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of insufficient long-term stability, poor catalyst activity, narrow temperature window, etc., and achieve excellent resistance to SO2 and Effects of water vapor poisoning performance, high space velocity, and excellent long-term stability

Inactive Publication Date: 2015-11-25
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to develop a new environmentally friendly, green, high-efficiency low-temperature SCR denitrification catalyst, overcome the poor catalyst activity, narrow temperature window, and insufficient long-term stability of the existing denitrification catalysts in low-temperature flue gas containing sulfur dioxide (100ppm) and water vapor (10%) , the object of the present invention is to provide a low-temperature (100-200°C) flue gas denitrification powder catalyst, preparation method and application thereof. -1 ), low-concentration sulfur dioxide (100ppm) and water vapor (10%) in low-temperature flue gas NO x The conversion rate is high, and the preparation method of the catalyst is simple and easy

Method used

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  • Flue gas denitrification powder catalyst as well as preparation method and application thereof
  • Flue gas denitrification powder catalyst as well as preparation method and application thereof
  • Flue gas denitrification powder catalyst as well as preparation method and application thereof

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Embodiment 1

[0050] (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.

[0051] (2) In a constant temperature water bath at 25°C, add the above-mentioned titanium manganese copper nickel cerium salt mixture dropwise with sodium carbonate solution to completely precipitate titanium, manganese, copper, nickel, and cerium ions. 11. Stir for 3 hours at a stirring speed of 500 rpm, and leave to age for 6 hours. Suction filter the obtained precipitated suspension to obtain a filter cake, then add an appropriate amount of deionized water to the filter cake for beating, stirring, and suction filtration, and repeat the washing for 3 times in this way to obtain titanium manganese copp...

Embodiment 2

[0054] (1) configure titanyl sulfate, manganese nitrate, ferric nitrate, copper nitrate, zirconium oxychloride, cerium nitrate solution and 10wt% sodium carbonate solution; and the cerium nitrate solution are uniformly mixed to obtain a mixed solution, and the molar ratio of the six elements of Ti, Mn, Fe, Cu, Zr and Ce in the mixed solution is controlled to be 1:0.2:0.1:0.2:0.01:0.1;

[0055] (2) In a constant temperature water bath at 25°C, add the above-mentioned titanium, manganese, iron, copper, zirconium and cerium salt mixture dropwise with sodium carbonate solution to completely precipitate titanium, manganese, iron, copper, zirconium, and cerium ions, and control the pH after the addition is completed. = 9-11, stir for 3 hours at a stirring speed of 500 rpm, and leave to age for 6 hours. Suction filter the obtained precipitated suspension to obtain a filter cake, then add an appropriate amount of deionized water to the filter cake for beating, stirring, and suction fi...

Embodiment 3

[0058] (1) configure titanyl sulfate, manganese acetate, ferric nitrate, copper nitrate, zirconium oxychloride, cobalt nitrate solution and 10wt% sodium carbonate solution; and cobalt nitrate are uniformly mixed to obtain a mixed solution, and the molar ratio of the six elements of Ti, Mn, Fe, Cu, Zr and Co in the mixed solution is controlled to be 1:0.3:0.01:0.1:0.1:0.1;

[0059] (2) In a constant temperature water bath at 25°C, add the above-mentioned titanium, manganese, iron, copper, zirconium and cobalt salt mixture dropwise with sodium carbonate solution to completely precipitate titanium, manganese, iron, copper, zirconium, and cobalt ions. pH = 9-11, stirred for 3 hours at a stirring speed of 500 rpm, and aged for 6 hours. Suction filter the obtained precipitated suspension to obtain a filter cake, then add an appropriate amount of deionized water to the filter cake for beating, stirring, and suction filtration, and repeat the washing for 3 times in this way to obtain ...

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Abstract

The invention relates to a flue gas denitrification powder catalyst as well as a preparation method and application thereof. The catalyst comprises titanium dioxide and manganese oxide serving as main components, as well as auxiliaries which are any three or a combination of three or more in oxides of zirconium, copper, molybdenum, cerium, ferrum, nickel, cobalt, niobium and tungsten, wherein the molar ratio of Mn to Ti is equal to 0.01-1.0, and the molar ratio of each metal in the auxiliaries to a titanium element is equal to 0.01-1.0 independently. The catalyst is prepared through a co-precipitation method. The catalyst can be applied to purification with selective catalytic reduction of nitric oxide (NH3-SCR) in flue gas with a fixed source and a moving source. The catalyst prepared from the non-poisonous harmless raw materials has the advantages of convenient preparation method, high catalytic activity, high N2 selectivity, wide active window, resistance to low-concentration SO2 poisoning and water vapor poisoning, environmental friendliness, etc.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a flue gas denitrification powder catalyst, a preparation method and an application thereof. Background technique [0002] With the development of my country's economy, energy consumption, especially petrochemical energy consumption, 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. [0003] 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 total, but NO x The emissions a...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01D53/56B01D53/86B01D53/94
Inventor 张鑫陈志坤吕一品高金森
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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