Ozone oxidation catalyst for degradation of organic wastewater and preparation method thereof

Abstract

The invention discloses an ozone oxidation catalyst for degradation of organic wastewater, wherein the ozone oxidation catalyst is prepared from the following raw materials by the mass percentage: 93-96.5% of an active powder, 0.3-1% of graphite, 1.2-3% of a pore forming agent, and 2-3% of a binder, wherein the sum of the mass percentages of the components is 100%. The contradiction between the 'catalyst activity' of a conventional catalyst and 'obtaining of high strength by high temperature roasting' is solved effectively; the resistance of the catalyst in operation is greatly reduced, and the operation cost is saved for users; at the same time, the bulk density has a certain decrease compared with that of a conventional catalyst, the raw materials are saved for manufacturers, the production cost is reduced and good practical results are achieved.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to an ozone oxidation catalyst for organic waste water degradation and a preparation method thereof. Background technique [0002] Catalytic ozonation water treatment technology is an advanced oxidation technology based on ozone. It combines the strong oxidation of ozone with the adsorption and catalytic properties of catalysts, which can effectively solve the problem of incomplete degradation of organic matter in sewage and open up new opportunities for COD emission standards. a new way. The heterogeneous catalytic ozonation method uses an ozone oxidation catalyst to accelerate the oxidation reaction between the liquid phase and the gas phase under normal pressure. The catalyst exists in a solid state and is installed in the oxidation reaction tower or reaction pool. It is easy to separate from water and has less secondary pollution. Therefore, more and more people pay more and ...

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Problems solved by technology

Catalysts are used for sewage treatment, so higher strength is required, and the preparation method to increase strength is generally achieved by high-temperature roasting above 600°C, but roasting the active components of existing catalysts above 600°C will cause activity attenuation. Iron oxide or manganese oxide will form iron aluminate, manganese aluminate, iron titanate and manganese titanate with carrier alumina or titanium oxide at high temperature, which will make the active components iron oxide and manganese oxide deteriorate, thus making the organic wastewater The degradation rate activity is greatly reduced, that is, "catalyst activity" and "high-temperature roasting to obtain high strength" are contradictory entities

In addition, the following defects still exist in the application of existing solid columnar or spherical product catalysts: the solid catalyst has a large resistance during operation, and the power required to transport low-concentration ozone increases, resulting in an increase in operating costs; Larger consumption of raw materials and higher production costs

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