Ozone decomposition catalyst and method of producing the same

Abstract

The invention relates to a catalyst for ozone decomposition and a method for preparing the same. The catalyst uses activated carbon particles or activated carbon fiber as a carrier, and uses manganese, nickel, silver, and cerium as active components of the catalyst. The method for preparing the catalyst comprises the following steps: A. mixing the same volume of a manganese nitrate solution, a nickel nitrate solution, a silver nitrate solution and a cerium nitrate solution to prepare an active component solution; B. selecting the activated carbon particles or the activated carbon fiber as the catalyst carrier, immersing the carrier in the prepared active component solution, and then taking out the carrier for washing and drying; C. taking out the carrier and immersing the carrier in a sodium carbonate solution; and D. taking out the carrier for washing, drying, and baking to obtain a finished product of the catalyst. The method for preparing the catalyst has the advantages of simple process, high ozone decomposition efficiency, low cost, stable performance, long service life, and wide application prospect.

Description

[0001] Involved areas [0002] The invention relates to an ozone decomposition catalyst and a preparation method thereof. Background technique [0003] Ozone is a strong oxidant and a broad-spectrum bactericidal disinfectant. It can be widely used in various water quality treatment, medical hygiene, food preservation, and removal of refractory substances. However, due to the low utilization rate of ozone, it is often used in actual use. Produces large amounts of residual ozone. If the residual ozone is directly discharged into the atmosphere, it will inevitably cause environmental pollution. In addition, the ozone generated from the engine room, copier and high-voltage discharge will also directly affect the ambient air. When the ozone concentration exceeds 0.06mg m -3 It will cause certain harm to the human body. Therefore, it is very necessary to treat ozone before it is discharged and convert it into harmless substances. [0004] At present, the catalyst active componen...

AI Technical Summary

Problems solved by technology

The technical solutions proposed in these patent applications all use noble metal components. This type of catalyst has better catalytic decomposition performance, but its cost is high, and the ozone decomposition process will be strongly inhibited when water vapor exists. After a period of use, it must be heated and regenerated. Larger limit

There is also a transition metal oxide catalyst, which is a relatively cheap ozonolysis catalyst, such as K.Kodama (Chinese translation: Kedama) in its patent application is to load transition metal oxides CoOx and NiOx to silica gel Catalysts obtained above are particularly effective in deodorizing, decolorizing, sterilizing, and decomposing residual ozone after decomposing organic matter, but their decomposition efficiency is low, their service life is short, and there must be a certain water vapor environment during use. High, difficult to promote the use of

In addition, manganese compound catalyst is also a kind of catalyst that has been studied more. Oyama (Chinese translation: Ou Yama) et al. 2 o 3 MnO 2 The conclusion of the best activity, since most of the researchers' work is to contain MnO 2 It is modified on the basis of the catalyst, but the preparation process is relatively complicated and the application conditions are limited in the ozone catalyst made by this method, which still cannot meet the needs.