Integral ozonolysis catalyst and preparation method thereof
An ozonolysis, integrated technology, applied in catalyst activation/preparation, molecular sieve catalysts, separation methods, etc., can solve the problems of low purification and degradation efficiency, large wind resistance, and inconvenient filling.
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[0046] see figure 1 , the preparation method of the monolithic ozone decomposition catalyst comprises the following steps:
[0047] In step S10, the aqueous solution of the active metal salt is mixed with the coating material-alcohol suspension to form a mixed solution.
[0048] In this embodiment, the aqueous solution of the active metal salt and the coating material-alcohol suspension are mixed to form a mixed solution, wherein the active metal can be copper, nickel, cobalt, iron, manganese, etc., and the active metal salt in this embodiment is preferably manganese acetate and ferric nitrate to form manganese oxides and iron oxides after subsequent steps; the coating material includes at least one of silicon-based mesoporous materials and silicon-aluminum molecular sieves, wherein the silicon-based mesoporous materials include hierarchical porous silicon-based materials and One or more of MCM-41 molecular sieves; silica-alumina molecular sieves include one or more of ZSM-5 ...
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[0068] Example 1
[0069] The catalyst of this example includes a carrier and a coating. The carrier is a cordierite ceramic honeycomb; the coating includes active metal oxides, gamma alumina and coating materials, the active metal oxides are manganese acetate and ferric nitrate, and the coating materials are hierarchical porous silicon-based materials.
[0070] Dissolving the active metal oxide in deionized water to prepare an aqueous solution of active metal salt with a mass concentration of 20 wt %; adding the coating material into ethanol, and ultrasonically dispersing into a coating material-alcohol suspension with a mass concentration of 40 wt % . The aqueous solution of the active metal salt prepared above and the coating material-alcohol suspension were mixed in a weight ratio of 3:6 to form a mixed solution. After taking 90g of mixed solution ultrasonically treated for 30min, 30g of gamma alumina, 2g of binder, and 10g of pore-forming agent were successively added t...
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[0071] Example 2
[0072] The catalyst of this example includes a carrier and a coating. Wherein, the carrier is a cordierite ceramic honeycomb; the coating includes active metal oxide, gamma alumina and a coating material, the active metal oxide is manganese acetate and ferric nitrate, and the coating material is MCM-41 molecular sieve.
[0073] The active metal oxide is dissolved in deionized water to prepare an aqueous solution of active metal salt with a mass concentration of 5wt%; the coating material is added to ethanol, and ultrasonically dispersed into a coating material-alcohol suspension with a mass concentration of 30wt% . The aqueous solution of the active metal salt prepared above and the coating material-alcohol suspension were mixed in a weight ratio of 4:6 to form a mixed solution. After taking 100 g of the mixed solution and ultrasonically treating it for 1 min, 13.6 g of gamma alumina, 0.5 g of a binder, and 3.4 g of a pore-forming agent were sequentially a...
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