Ozone oxidation ammonia gas catalyst, preparation method and application thereof

Abstract

The invention relates to an ozone oxidation ammonia gas catalyst as well as a preparation method and application thereof, and belongs to the technical field of environment-friendly chemical industry. The catalyst is composed of a carrier, an active component and an auxiliary component. The carrier is a molecular sieve or activated carbon. The active component is copper oxide and / or manganese oxide. The auxiliary components are ferric oxide and titanium oxide. The preparation method of the catalyst comprises the following steps: adding salt of active components and and ferric salt into water, conducting stirring and dissolving to obtain a metal salt solution, adding a carrier and titanium dioxide into the solution, continuously conducting stirring, dropwise adding a precipitator into the solution to co-precipitate the salt of the active components and ferric salt, stopping dropwise adding the precipitator when the pH value of the metal salt solution reaches 7.5-8.3, washing the obtained precipitate with water, conducting filtering, drying and molding, and then conducting roasting at 300-450 DEG C for 3-6 hours to obtain the catalyst. The catalyst is combined with ozone for use, and can be applied to ammonia gas purification.

Description

technical field [0001] The invention relates to an ozone oxidation catalyst for ammonia gas, a preparation method and application thereof. The catalyst can combine ozone at room temperature to remove ammonia gas in the environment, and belongs to the technical field of environmental protection chemical industry. Background technique [0002] With the rapid development of social industrialization and the increasing frequency of human activities, the problem of environmental pollution has become increasingly serious. The decomposition of domestic waste and interior decoration, etc., cause the indoor ammonia and benzene content to exceed the standard, which seriously threatens human health. The effective degradation and treatment of various inorganic and organic pollutants is an urgent problem to be solved at present. [0003] Ammonia is a colorless gas with a pungent smell. After being inhaled into the lungs, it easily enters the blood through the alveoli, combines with hemogl...

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Problems solved by technology

The absorption method is to use acidic agents to react with ammonia gas, which requires a large amount of chemical agents; the adsorption method is to use activated carbon and other adsorbents to adsorb ammonia gas, but the adsorption amount is small, frequent replacement, and high maintenance costs; the combustion method is mainly used for In industry, it is suitable for high-temperature and high-concentration organic waste gas, but not suitable for removing ammonia at room temperature; photocatalytic removal of ammonia requires light source and low light utilization rate, and the removal rate of ammonia is not high

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