Preparation of copper and cobalt codoped manganese-based catalyst and application of catalyst to low-concentration ozonolysis

An ozone decomposition and catalyst technology, which is applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, separation methods, etc., can solve the problem of insufficient stable performance, short service life and moisture resistance of ozone decomposition catalysts. It can improve catalytic activity and water resistance, long service life and strong moisture resistance.

Inactive Publication Date: 2019-01-25
GUANGDONG POLYTECHNIC OF ENVIRONMENTAL PROTECTION ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This solves the problems of insufficient stability, short service life and poor moisture resistance of the existing technical indicators of ozonolysis catalysts.

Method used

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  • Preparation of copper and cobalt codoped manganese-based catalyst and application of catalyst to low-concentration ozonolysis
  • Preparation of copper and cobalt codoped manganese-based catalyst and application of catalyst to low-concentration ozonolysis
  • Preparation of copper and cobalt codoped manganese-based catalyst and application of catalyst to low-concentration ozonolysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Dissolve 0.948g of potassium permanganate in 30mL of deionized water and stir for 30min to form homogeneous phase A. Dissolve 2.208 g of manganese acetate in 30 mL of deionized water and stir for 30 min to form a homogeneous phase B. Then in the state of continuous stirring, liquid A and liquid B are uniformly mixed, and then 0.0192g of copper nitrate solid and 0.0291g of cobalt nitrate solid are added to the above-mentioned homogeneously mixed solution, and after ultrasonic dissolution is complete, they are transferred to a 150mL hydrothermal reactor, The temperature was 140° C. for 2 hours, and cooled naturally after the reaction. The precipitate was obtained by centrifugation, washed several times with deionized water and dried overnight. Then put the catalyst material in 2mol / L nitric acid for acid treatment for 15min, and dry it for later use. Add 1ml of PTFE emulsion (60%) to deionized water at a ratio of 1:30, then add 200mg of the above-mentioned catalyst powd...

Embodiment 2

[0021] Dissolve 1.58g of potassium permanganate in 50mL of deionized water and stir for 30min to form homogeneous phase A. Dissolve 3.68g of manganese acetate in 50mL of deionized water and stir for 30min to form a homogeneous phase B. Then, in the state of continuous stirring, liquid A and liquid B are uniformly mixed, and then 0.032 g of copper nitrate solid and 0.05 g of cobalt nitrate solid are added to the uniformly mixed solution, and after ultrasonic dissolution is complete, they are transferred to a 150 mL hydrothermal reaction kettle. The temperature was 140° C. for 2 hours, and cooled naturally after the reaction. The precipitate was obtained by centrifugation, washed several times with deionized water and dried overnight. Then put the catalyst material in 5mol / L nitric acid for acid treatment for 15min, and dry it for later use. Add 1ml of PTFE emulsion (60%) to deionized water at a ratio of 1:30, then add 200mg of the above-mentioned catalyst powder to the dilute...

Embodiment 3

[0023] Dissolve 1.58g of potassium permanganate in 50mL of deionized water and stir for 30min to form homogeneous phase A. Dissolve 3.68g of manganese acetate in 50mL of deionized water and stir for 30min to form a homogeneous phase B. Then, in the state of continuous stirring, liquid A and liquid B are uniformly mixed, and then 0.032 g of copper nitrate solid and 0.05 g of cobalt nitrate solid are added to the uniformly mixed solution, and after ultrasonic dissolution is complete, they are transferred to a 150 mL hydrothermal reaction kettle. The temperature was 160°C for 4 hours, and cooled naturally after the reaction. The precipitate was obtained by centrifugation, washed several times with deionized water and dried overnight. Then put the catalyst material in 2mol / L hydrochloric acid for acid treatment for 30min, and dry it for later use. Add 1ml of PTFE emulsion (60%) to deionized water at a ratio of 1:30, then add 200mg of the above-mentioned catalyst powder to the di...

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Abstract

The invention discloses preparation of a copper and cobalt codoped manganese-based catalyst with high stability and water-resistant capability and application of the catalyst to low-concentration ozonolysis, and belongs to the technical field of ozone purification catalysts. An efficient water-resistant ozonolysis catalyst is prepared by using copper, cobalt and manganese as active ingredients bya hydro-thermal method. In the preparation process, a certain quantity of potassium permanganate and manganese acetate are respectively dissolved in de-ionized water to form a uniform solution; then,a manganese acetate solution is slowly added into the potassium permanganate solution; uniform stirring is performed to form a uniform solution; copper nitrate solid and cobalt nitrate solid are addedinto the uniform solution; ultrasonic uniform stirring is performed; then, the solution is transferred into a hydrothermal reaction kettle; the temperature is regulated to be 150 DEG C; reaction is performed for 2h; after the reaction is finished, natural cooling is performed; after centrifugal washing and acid treatment drying are performed, the final material is obtained. The preparation methodis simple and convenient; the materials can be easily obtained; the problem of poor water resistant capability of a catalyst in the existing process is solved; the preparation process is simple; thematerials can be easily obtained; good industrial application prospects are realized.

Description

technical field [0001] The invention belongs to the technical field of ozone purification catalysts, and in particular relates to an efficient moisture-resistant ozone decomposition catalyst and a preparation method thereof. Background technique [0002] Ozone is a strong oxidant and a broad-spectrum bactericidal disinfectant, which is used in many aspects. During use, due to the low utilization rate, a large amount of residual ozone is often generated indoors. These low concentrations of ozone will endanger human health. my country's "Ambient Air Quality Standard GB3095-2012" stipulates that the first and second standards are that the average value of 1 hour is not more than 0.16 and 0.20mg / m 3 (about 0.08 and 0.10ppm), while "Indoor Air Quality Standard GB / T 18883-2002" stipulates that the average value of indoor air in one hour is not more than 0.16mg / m 3 . [0003] At present, the removal methods of ozone mainly include activated carbon method, thermal decomposition m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01D53/86B01D53/66
CPCB01D53/8675B01J23/8892
Inventor 涂舜恒王克亮邹海英王静张栖姚伟卿胡金梅
Owner GUANGDONG POLYTECHNIC OF ENVIRONMENTAL PROTECTION ENG
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