A kind of gas-phase in-situ oxidation preparation method of MN-CE-FE-CO four-way catalytic function PPS filter material

Abstract

The invention discloses a gas-phase in-situ oxidation preparation method of Mn-Ce-Fe-Co four-way catalytic functional PPS filter material. The surface viscosity of polyphenylene sulfide (PPS) is modified by the agent. After impregnation, adsorption, and secondary low-temperature drying and dehydration, gas-phase oxidation occurs in contact with ozone at a concentration of 10mg / L-240mg / L, and the active metal ions are directly filtered on the PPS. The surface of the material fiber is oxidized in situ into a highly catalytically active oxide form, and the preparation of the Mn-Ce-Fe-Co four-way catalytic function PPS filter material is completed. The preparation method of the present invention takes gas-phase oxidation as the core innovation point, has wide sources of materials, simple and stable gas storage, simple safety leakage inspection, and high production safety.

Description

technical field [0001] The present invention relates to a preparation method of a catalytic functional filter material, in particular to a gas-phase in-situ oxidation preparation method of a Mn-Ce-Fe-Co quaternary catalytic functional PPS filter material, so as to realize the integration of dust removal, denitrification and mercury removal , for NO in industry, smelting industry and coal-fired power plants x Catalysis and HgO oxidation removal. Background technique [0002] NO x It is one of the four major air pollutants in my country, and is the main culprit that causes acid rain and various respiratory diseases. The current control method is SCR technology. The commonly used catalyst is titanium vanadium commercial denitrification catalyst, and mercury and its compounds are The most toxic heavy metal pollutants in nature can cause serious damage to the human central nervous system, immune system, kidneys, and skin in a small amount. The control method is mostly flue activ...

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Problems solved by technology

[0002] NO x It is one of the four major air pollutants in my country, and is the main culprit that causes acid rain and various respiratory diseases. The current control method is SCR technology. The commonly used catalyst is titanium vanadium commercial denitrification catalyst, and mercury and its compounds are The most toxic heavy metal pollutants in nature can cause serious damage to the human central nervous system, immune system, kidneys, and skin in a small amount. The control method is mostly flue activated carbon injection technology, whether it is NO x NH 3 -SCR is still a flue activated carbon injection technology for Hg. The construction cost of a single device is high, the reaction conditions are poor, and the service life is short. Therefore, it is necessary to develop a combined pollutant removal technology under low temperature conditions.

[0003] In the invention patent with the application number CN201710655390.X, a "chitosan-coated manganese dioxide-ferric oxide / PPS composite denitrification filter material and its preparation method" is disclosed. The method is to combine MnO 2 -Fe 2 o 3 Catalyst metal oxides are directly loaded onto the PPS filter material by ultrasonic waves, and then a layer of chitosan film is coated on the surface of the loaded PPS filter material to improve the MnO 2 , Fe 2 o 3 However, the main problems of this method are: 1. The chitosan film will cover the catalytic active sites on the surface while covering the surface of the PPS filter material, reducing the catalytic activity of the filter material; 2. With MnO 2 , Fe 2 o 3 PPS filter material impregnated with particle suspension not only has a slow adsorption rate, but also has poor surface load uniformity and low dispersion due to large particles;

[0004] In the invention patent with the application number 201710679961.3, a "composite filter material with in-situ loading denitrification and anti-sulfur catalyst and its preparation method" is disclosed. In this method, sodium dodecylbenzenesulfonate is selected to activate and modify the PPS filter material. Then add cobalt ions to adsorb on the surface of the filter material, and finally use potassium dichromate as an oxidant to generate Cr on the surface of the filter material. 2 o 3 and CoO x To prepare denitrification and anti-sulfur functional composite filter material, but the potassium dichromate oxidant used in this process is a toxic chemical, and there will be major safety hazards, high chemical treatment costs and environmental pollution during industrial production

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