A kind of cerium manganese catalyst that decomposes ozone under wide temperature and high space velocity, preparation method and application

Abstract

The invention provides a cerium-manganese catalyst for decomposing ozone at a wide temperature and high space velocity, a preparation method and an application thereof. The cerium-manganese catalyst has the following chemical composition: CeMn a o x , the CeMn a o x The value of a is selected from natural numbers between 6 and 15, and the cerium-manganese catalyst is mainly Mn 2 o 3 and CeO 2 of composite oxides. The preparation method comprises: mixing a solution containing cerium source and manganese source with excess urea, reacting to obtain a precipitated product, washing the precipitated product until the pH is neutral, drying, and roasting to obtain a cerium-manganese catalyst. The cerium-manganese catalyst can be applied to the conditions of wide temperature and high space velocity to efficiently decompose ozone for a long time; The problem of ozone pollution in the air, and can be applied to high-altitude aircraft to solve the problem of ozone pollution.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to a cerium-manganese catalyst, a preparation method and an application, in particular to a cerium-manganese catalyst for decomposing ozone at a wide temperature and high space velocity, a preparation method and an application. Background technique [0002] Ozone (O 3 ) and oxygen (O 2 ) is an allotrope of oxygen, which has a special fishy smell and is lavender in color. It has a double-edged sword effect on the environment on which human beings depend. In the stratosphere, ozone can resist the harmful ultraviolet rays that directly irradiate the earth. However, near the surface, ozone will have varying degrees of impact on the human skin, immune system, and nervous system. Therefore, we must attach great importance to the hazards of ozone. [0003] On October 1, 2015, the U.S. Environmental Protection Agency (EPA) tightened the ozone emission standard from 75ppb to 70ppb. my coun...

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Problems solved by technology

[0006] In view of the deficiencies in the prior art, the object of the present invention is to provide a cerium-manganese catalyst for decomposing ozone at a wide temperature and high space velocity, a preparation method and an application. The preparation method of the catalyst is simple, the process flow is short, and it can be applied to a wide temperature Under the conditions of high space speed and high airspeed, and suitable for wide humidity conditions, it can efficiently decompose various ozone-containing gases for a long time, and is expected to be used on the outer surface of buildings or motor vehicle radiators to solve the problem of ozone pollution in the atmosphere, and can Applied to high-altitude aircraft to solve the problem of ozone pollution

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