Manganese-based composite oxide catalyst for catalytically decomposing ozone, and preparation method of manganese-based composite oxide catalyst
A composite oxide, catalytic decomposition technology, applied in the field of manganese-based composite oxide catalyst and its preparation, can solve the problems of poor moisture resistance, short life, high cost of precious metals, etc., to achieve good moisture resistance, reduce hazards, and catalyst life long effect
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Embodiment 1
[0053] Embodiment 1 Precipitation method prepares manganese-based composite oxide catalyst
[0054] Dissolve manganese nitrate and ferric nitrate in water respectively, prepare a solution with a molar ratio of Mn / Fe of 1 and mix well, add excess urea to the solution, and continuously stir at 90°C for 12 hours, then perform suction filtration and wash for 3 The filter cake was obtained for the first time, and the filter cake was dried in an oven at 100°C for 10 hours, and finally calcined in air at 500°C for 5 hours in a muffle furnace to obtain a powdered catalyst. The prepared catalyst was pressed into tablets, crushed, sieved, and 20-40 meshes were taken for later use, which was called catalyst A.
Embodiment 2
[0055] Embodiment 2 Precipitation method prepares manganese-based composite oxide catalyst
[0056] Dissolve manganese chloride and copper sulfate in water respectively, prepare a solution with a Mn / Cu molar ratio of 0.2 and mix uniformly, slowly add excess sodium carbonate to the solution while stirring, then separate by suction filtration and wash to obtain a filter cake. The filter cake was dried in an oven at 120°C for 5 hours, and finally calcined in air at 300°C for 24 hours in a muffle furnace to obtain a powdered catalyst. The prepared catalyst is pressed into tablets, ground, sieved, and 20-40 meshes are taken for later use.
Embodiment 3
[0057] Embodiment 3 Precipitation method prepares manganese-based composite oxide catalyst
[0058] Dissolve manganese nitrate, copper sulfate and nickel nitrate in water respectively, prepare a solution with a molar ratio of Mn / (Cu+Ni) of 0.5 and mix evenly, slowly add excess sodium carbonate to the solution while stirring, then vacuum filter and wash The filter cake was obtained 4 times, and the filter cake was put into an oven and dried at 80°C for 36 hours, and finally roasted in air at 800°C for 3 hours in a muffle furnace to obtain a powdered catalyst. The prepared catalyst is pressed into tablets, ground, sieved, and 20-40 meshes are taken for later use.
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