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Wear-resistant catalyst and preparation method thereof

A catalyst and wear-resistant technology, applied in the field of catalytic denitrification, can solve the problems of low catalyst strength and small application range of the catalyst, and achieve the effects of improving activity and stability, widening the temperature window, and enhancing wear resistance

Active Publication Date: 2020-04-10
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalyst has a small application range and a low catalyst strength, and the pulverization is relatively fast in industrial use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) First, 75.38g of nano-SiC powder was dispersed into 500mL of ethylene glycol solution to form solution a, and 29.86g of pseudo-boehmite was dissolved in 100mL of deionized water to obtain solution b. Subsequently, solution b was added to solution a, and continued to stir for 30 minutes to form a uniform suspension, which was spray-dried in a spray-drying molding device. The temperature in the spray-drying furnace was set at 350°C, the outlet temperature was 250°C, and the outlet pressure was 4Mpa. Naturally cooled to room temperature to obtain Al 2 o 3 @SiC microspheres were washed three times each with deionized water and ethanol. Then the prepared Al 2 o 3 @SiC microspheres and 99.47g ammonium fluoride, 33.16g [Bmim][HSO 4 ] were mixed and added to deionized water for ultrasonication and magnetic stirring for 2h, then the suspension was transferred to a hydrothermal kettle and heated to 200°C for 2h. After the reaction kettle is naturally cooled to room tempe...

Embodiment 1-2

[0049] NO removal experiment: The catalyst A was heated to 350°C with an electric heating device, and the experiment lasted for 2 hours. The NO emission was measured every 30 minutes, and the average value was 93ppm. The removal rate of NO is 84.5%.

Embodiment 1-3

[0051] NO removal experiment: The catalyst A was heated to 400°C with an electric heating device, and the experiment lasted for 2 hours. The NO emission was measured every 30 minutes, and the average value was 76ppm. The removal rate of NO is 87.3%.

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PUM

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Abstract

The invention discloses a wear-resistant catalyst and a preparation method thereof. The catalyst takes mesoporous SiC microspheres as a carrier and a manganese copper oxide as an active component, andthe method comprises the steps: firstly, fully mixing pseudo-boehmite and nano silicon carbide powder, and performing spray drying forming to obtain a mixed microsphere carrier; then carrying out chemical etching processing on the microspheres by using a processing agent under a hydrothermal condition to obtain the mesoporous SiC microspheres; and finally, sequentially adding a copper salt and amanganese salt, and uniformly mixing to obtain the catalyst disclosed by the invention. According to the present invention, the catalyst carrier is the mesoporous silicon carbide microspheres, the mesoporous structure with the uniform pore size is beneficial for a reactant to achieve active sites so as to improve the activity and the stability of the catalyst, and the preparation method enhances the dispersity of the active components Mn and Cu and improves the activity of the catalyst.

Description

technical field [0001] The invention belongs to the technical field of catalytic denitrification, and in particular relates to a wear-resistant catalyst and a preparation method thereof. Background technique [0002] Utility power plants and other stationary fuel combustion facilities such as industrial boilers, waste incinerators, and manufacturing plants are significant sources of air pollutants from the combustion process. Among the pollutants formed by these stationary combustion sources, nitrogen oxides are of particular concern. Nitrogen oxides, also known as NO x gas, mainly consisting of nitric oxide (NO) and nitrogen dioxide (N0 2 is NO x normal composition). These compounds play an important role in atmospheric reactions that cause harmful particulate matter, ground-level ozone (smog), acidifying nitrate deposits (acid rain), ozone depletion, and the greenhouse effect. Therefore, NO from stationary combustion sources x It has been subject to increasingly stri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/224B01J35/02B01J35/08B01J35/10B01J37/08B01J37/00B01D53/86B01D53/56B01J35/00
CPCB01J37/0018B01J27/224B01D53/8628B01J35/51B01J35/40B01J35/647Y02A50/20
Inventor 魏立彬衡华周波刘一李源张宏科
Owner WANHUA CHEM GRP CO LTD
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