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Catalyst for catalytic oxidation of NO and preparation method thereof

A catalytic oxidation and catalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problems of high maintenance costs, acceleration, and difficult design of special catalytic reactors and other problems, to achieve the effect of low cost, simple preparation process and strong industrial application value

Active Publication Date: 2011-12-14
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both of the above two methods need to use external conditions to accelerate the catalytic reaction process, the maintenance cost is high, and the energy utilization rate is low. At the same time, the design of a special catalytic reactor is also a difficulty

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The catalyst for catalyzing the oxidation of NO produced according to the present invention, wherein the mass percent content of each component is: manganese (5.65), copper (4.35), titanium (60), and the rest is oxygen. The molar ratio of manganese and copper is 1.5:1. Specific steps are as follows:

[0020] 1 Prepare carrier titanium dioxide by sol-gel method: 0.128mol of acetylacetone (C 6 h 8 o 2 ) by adding 0.064mol of tetrabutyl titanate (Ti(OC 4 h 9 ) 4 ), then add ethanol, and stir at room temperature for 2 hours to obtain a sol. The sol was concentrated in a water bath at 60°C for 6 hours, then dried at 120°C for 6 hours, and finally calcined in air at 500°C for 3 hours to obtain carrier titanium dioxide;

[0021] 2 Load active components by impregnation method: dissolve a certain amount of manganese acetate and copper nitrate in an appropriate amount of deionized water to prepare an impregnation solution, then weigh a certain amount of carrier titanium d...

Embodiment 2

[0023] The catalyst for catalyzing the oxidation of NO produced according to the present invention, wherein the mass percent content of each component is: manganese (5.65), copper (4.35), titanium (60), and the rest is oxygen. The molar ratio of manganese and copper is 1.5:1. Concrete preparation steps are identical with embodiment 1. The difference is that when the carrier titanium dioxide is prepared by the sol-gel method, the sol is concentrated in a water bath at 60°C for 6 hours, then dried at 100°C for 6 hours, and finally roasted in the air at 500°C for 3 hours to obtain the carrier titanium dioxide ; When the impregnation method is used to load the active components, after impregnation at room temperature for 3 hours, then dry at 100°C for 6 hours, and finally bake at 250°C in air for 4 hours. Get a catalyst.

Embodiment 3

[0025] The catalyst for catalyzing the oxidation of NO produced according to the present invention, wherein the mass percent content of each component is: manganese (6.34), copper (3.66), titanium (60), and the rest is oxygen. The molar ratio of manganese and copper is 2:1. Concrete preparation steps are identical with embodiment 1. The difference is that when the carrier titanium dioxide is prepared by the sol-gel method, the sol is concentrated in a water bath at 60°C for 8 hours, then dried at 100°C for 8 hours, and finally roasted in the air at 450°C for 4 hours to obtain the carrier titanium dioxide ; When the impregnation method is used to load the active components, after impregnation at room temperature for 4 hours, then dry at 100°C for 10 hours, and finally bake at 350°C in air for 2 hours. Get a catalyst.

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Abstract

The invention discloses a catalyst used for catalytically oxidizing NO and a preparation method thereof. Manganese oxide and copper oxide are taken as active components of the catalyst and titanium dioxide is taken as a carrier. The manganese oxide and copper oxide which belong to P-type semiconductors are taken as the active components, thereby obviously promoting the activity of the catalyst atlow temperature and meanwhile overcoming the problem of steam and SO2 influence on the catalyst easily caused by a single active component. The catalyst has the advantages that the cost is low, the preparation process is simple, the environment is protected, the assistance of other external condition is unnecessary in a catalytic reaction process, the industrial application value is high, and thecatalyst can be applied to a catalytic oxidation-chemical absorption method for treating the SO2 and NOx in fire coal smoke.

Description

technical field [0001] The invention relates to a catalyst for catalytic oxidation of NO and a preparation method thereof. The catalyst can be used for treating NOx discharged from mobile sources or stationary sources, and belongs to the technical field of air pollution control. Background technique [0002] With the rapid development of my country's thermal power industry, SO 2 and NO x emissions are increasing. Through years of hard work, SO 2 The momentum of pollution has been gradually curbed, but NO x has not been effectively controlled. Therefore, in governance SO 2 Pollution while enhancing NO x The control of air pollution is one of the urgent problems to be solved in the current air pollution control. Current industrial applications of SO 2 and NO x The advanced control technology is mainly "SCR+WFGD" combination. This process model cannot meet the needs of development gradually because of its large equipment investment and high operating costs. NO in fl...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J23/72B01D53/86B01D53/56
Inventor 钟秦何川李小海
Owner NANJING UNIV OF SCI & TECH
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