Preparation method of modified TiO2 carrier loaded V-Mo denitration catalyst

A denitration catalyst and carrier-loaded technology, which is applied in the field of preparation of denitration catalysts, can solve the problems of catalyst denitration activity reduction, deactivation, poor stability, etc.

Active Publication Date: 2022-05-31
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But in the process of using, it is found that its stability is poor, especially in SO 2 In the presence of

Method used

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  • Preparation method of modified TiO2 carrier loaded V-Mo denitration catalyst
  • Preparation method of modified TiO2 carrier loaded V-Mo denitration catalyst
  • Preparation method of modified TiO2 carrier loaded V-Mo denitration catalyst

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Effect test

Embodiment 1

[0027] A preparation method of a Ge-Mn-Ti carrier loaded V-Mo denitration catalyst, the steps are as follows:

[0028] (1) Preparation of germanium manganese titanium (Ge-Mn-Ti) composite carrier: 10.0158g (according to 5gTiO 2 Calculate the amount of other substances) titanyl sulfate is completely dissolved in 100mL of deionized water, heated and stirred in a water bath at 60°C for 0.5h, and 0.0262g of germanium oxide is dissolved in 10mL of 3.5% ammonium bicarbonate aqueous solution to obtain GeO 2 Solution, 0.6140g manganese acetate (C 4 h 6 MnO 4 4H 2 O) be dissolved in 10mL deionized water to obtain manganese acetate solution, and slowly drop GeO2 into the flask through two titration funnels respectively. 2 (Ge:Ti=0.004:1) solution and manganese acetate (Mn:Ti=0.04:1) solution, then slowly add 30mL of ammonia water (25%) dropwise and keep stirring for 2h, so that the pH value of the solution is greater than 9, and the resulting precipitate Suction filtration and wash...

Embodiment 2

[0032]A preparation method of a Ge-Ti carrier loaded V-Mo denitration catalyst, the steps are as follows:

[0033] (1) Preparation of germanium-titanium (Ge-Ti) composite carrier: 10.0161g of titanium source (titanyl sulfate) was completely dissolved in 100mL of deionized water, heated and stirred in a water bath at 60°C for 0.5h, and 0.0263g of germanium oxide was dissolved in 3.5% ammonium bicarbonate in water to get GeO 2 Solution, slowly drop GeO into the flask through the titration funnel 2 Solution and ammonia solution (30mL, 25%) were stirred for 2h to make the pH value of the solution greater than 9, and the precipitate was suction-filtered and washed with deionized water until neutral to obtain a germanium-titanium composite precipitate, which was then dried in a drying oven at 120°C 12h, and then placed in an air atmosphere tube furnace at a constant temperature of 500°C for 4h to prepare a catalyst carrier. use N 2 The BET specific surface area of ​​the carrier m...

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Abstract

The invention provides a preparation method of a modified TiO2 carrier loaded V-Mo denitration catalyst, and belongs to the technical field of low-temperature flue gas pollutant control. According to the catalyst, germanium-manganese modified TiO2 or germanium modified TiO2 is adopted as a carrier to load a vanadium-molybdenum composite oxide, while the crystal form of TiO2 is stabilized, the electron synergistic effect between the carrier and an active component is modulated, the active component is adsorbed by the carrier through an impregnation method, the mass ratio of V2O5 to the carrier in the obtained catalyst is 3%, and the mass ratio of V2O5 to the carrier is 5%. The mass ratio of MoO3 to the carrier is 6%. The denitration catalyst prepared by the invention has relatively high low-temperature denitration efficiency and relatively good sulfur resistance, is suitable for removal of nitrogen oxides in flue gas, and has the advantages of low temperature, high efficiency and high stability.

Description

technical field [0001] The invention relates to the technical field of low-temperature flue gas pollutant control, in particular to a modified TiO 2 A method for preparing a denitration catalyst loaded with V-Mo on a carrier. Background technique [0002] Nitrogen oxides (NOx) are the main pollutants in the air, and the pollution of the environment will mainly lead to a series of problems such as acid rain, photochemical smog, thinning of the ozone layer and global warming. Therefore, the governments of various countries have increasingly strict requirements on the content of NOx in the exhaust gas. my country has formulated / revised a series of emission thresholds for NOx content in exhaust gas, and various regions have also formulated stricter NOx emission requirements according to local development, especially for NOx emissions in low-temperature flue gases such as metallurgical coking plants, cement factories, and glass factories. Require. Traditional stationary source ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/28B01D53/86B01D53/56
CPCB01J23/28B01D53/8628Y02A50/20
Inventor 陈红萍李泽清梁英华张鑫丰
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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