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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.

Pending Publication Date: 2021-04-27
SHENZHEN TIANDEYI ENVIRONMENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most of the mature catalyst products on the market are gamma alumina sphere-supported catalysts. In actual use, this type of catalyst has problems such as large wind resistance, easy deactivation under high humidity, low purification and degradation efficiency, and inconvenient loading.

Method used

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  • Integral ozonolysis catalyst and preparation method thereof
  • Integral ozonolysis catalyst and preparation method thereof
  • Integral ozonolysis catalyst and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0046] refer to figure 1 , the preparation method of the monolithic ozonolysis catalyst comprises the following steps:

[0047] Step S10, mixing the aqueous solution of the active metal salt 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 oxide and iron oxide 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 hierarchically porous silicon-based materials and One or more of MCM-41 molecular sieves; silica-alumina molecular sieves include one or more of ZSM-5 molecular...

Embodiment 1

[0069] The catalyst in this example includes a carrier and a coating. Wherein, 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 iron nitrate, and the coating materials are hierarchical porous silicon-based materials.

[0070] The active metal oxide is dissolved in deionized water to make an aqueous solution of an active metal salt with a mass concentration of 20wt%; the coating material is added to ethanol, and ultrasonically dispersed into a coating material-alcohol suspension with a mass concentration of 40wt% . The aqueous solution of the active metal salt prepared above and the coating material-alcohol suspension were mixed according to the weight ratio of 3:6 to form a mixed solution. After 90 g of the mixed solution was ultrasonically treated for 30 min, 30 g of gamma alumina, 2 g of a binder, and 10 g of a pore-forming agent were sequentially a...

Embodiment 2

[0072] The catalyst in this example includes a carrier and a coating. Wherein, 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 iron nitrate, and the coating material is MCM-41 molecular sieve.

[0073] The active metal oxide is dissolved in deionized water to make 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 according to the weight ratio of 4:6 to form a mixed solution. After 100 g of the mixed solution was ultrasonically treated 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 added to it, so that th...

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Abstract

The invention discloses an integral ozonolysis catalyst and a preparation method thereof. The integral ozonolysis catalyst comprises a cordierite ceramic honeycomb carrier and a coating applied to the surface of the cordierite ceramic honeycomb carrier, and the coating comprises active metal oxide, gamma aluminum oxide and a coating material; wherein the coating material comprises at least one of a silicon-based mesoporous material and a silicon-aluminum molecular sieve. According to the invention, the cordierite ceramic honeycomb is selected as a carrier, and the cordierite ceramic honeycomb has a regular pore structure and a large specific surface area, so the wind resistance of the catalyst is well reduced, and the decomposition efficiency is improved; at least one of a silicon-based mesoporous material and a silicon-aluminum molecular sieve is selected as a coating material, and the surface of a carrier is coated with the coating material, so that the catalyst has a rich microcosmic surface structure, the catalyst has rich active sites, water vapor is more easily separated from the active sites under high humidity, and the catalyst is ensured to still have considerable decomposition efficiency under high humidity.

Description

technical field [0001] The invention relates to the technical field of waste gas treatment, in particular to an integral ozone decomposition catalyst and a preparation method thereof. Background technique [0002] Ozone pollution exists widely in our living environment and is very harmful to the human body. The technologies for ozone treatment in the industry mainly include activated carbon method, thermal decomposition method, chemical liquid absorption method, and catalytic decomposition method. Among them, catalytic decomposition method is efficient, safe, stable and economical, and is currently the most ideal method for ozone decomposition. [0003] At present, most of the mature catalyst products on the market are gamma alumina sphere-supported catalysts. In actual use, this type of catalyst has problems such as large wind resistance, easy deactivation under high humidity, low purification and degradation efficiency, and inconvenient loading. Contents of the invention...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J29/04B01J29/80B01J29/48B01J37/02B01J37/00B01J37/08B01D53/86B01D53/66
CPCB01J23/8892B01J29/045B01J29/80B01J29/48B01J23/002B01J37/0215B01J37/0018B01J37/082B01D53/8675B01J29/041B01J29/40B01J2523/00B01D2257/106B01J2523/31B01J2523/72B01J2523/842Y02A50/20
Inventor 庾荣辉
Owner SHENZHEN TIANDEYI ENVIRONMENT TECH
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