Preparation method of mesoporous titanium dioxide ball supported Mn-Ce-W compound oxide denitration catalyst

A technology of mesoporous titanium dioxide and composite oxides, which is applied in the direction of metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of low-temperature activity, etc., and achieve improved Anti-toxicity, high catalytic activity, effect of improving catalytic activity and stability

Active Publication Date: 2014-09-03
SHANGHAI UNIV +1
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  • Application Information

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Problems solved by technology

Patent No. CN103084182A discloses a vanadium-free denitration catalyst, which uses Fe 2 o 3 -CeO 2 As the active component, TiO 2 as the carrier, in the middle and high temperature section (250~500 o C) The denitrification efficiency reaches more than 80%, but the low temperature activity is not outstanding

Method used

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  • Preparation method of mesoporous titanium dioxide ball supported Mn-Ce-W compound oxide denitration catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Take tetraisopropyl titanate and add solvent acetone to prepare a solution with a concentration of 0.005 mol / L, stir at room temperature for 30 min, then transfer the solution to a hydrothermal kettle, and control the filling rate at 60%. o C for 12 h, the product was collected by filtration, washed 3 times with deionized water and solvent, at 60 o C drying, the product is placed in a tube furnace, with 2 o C / min rate of heating up to 400 o C. After calcination for 2 h, mesoporous titanium dioxide balls were obtained after cooling in the furnace. Take the mesoporous titanium dioxide ball, add deionized water with a mass ratio of 1:20 to the mesoporous titanium dioxide ball, and then add manganese acetate, cerium nitrate, and ammonium metatungstate to make the mass of manganese oxide, cerium oxide, and tungsten The mass of oxide accounts for 10%, 10%, and 5% of the total mass respectively, and the rest is titanium dioxide. The mixed solution is stirred at 90 o C was e...

Embodiment 2

[0023] Take tetraisopropyl titanate and add solvent acetone to prepare a solution with a concentration of 0.01 mol / L, stir at room temperature for 30 min, and then transfer the solution to a hydrothermal kettle with the filling rate controlled at 70%. o C for 12 h, the product was collected by filtration, washed 3 times with deionized water and solvent, at 60 o C drying, the product is placed in a tube furnace, with 2 o C / min rate of heating up to 500 o C. After calcination for 2 h, mesoporous titanium dioxide balls were obtained after cooling in the furnace. Take the mesoporous titanium dioxide ball, add deionized water with a mass ratio of 1:30 to the mesoporous titanium dioxide ball, and then add manganese nitrate, cerium nitrate, and ammonium metatungstate to make the mass of manganese oxide, cerium oxide, and tungsten The oxide mass accounts for 5%, 10%, and 5% of the total mass respectively, and the rest is titanium dioxide. The mixed solution is stirred at 90 o C was...

Embodiment 3

[0026] Take tetrabutyl titanate and add solvent ethanol to prepare a solution with a concentration of 0.01 mol / L, stir at room temperature for 30 min, then transfer the solution to a hydrothermal kettle, and control the filling rate at 70%. o C for 12 h, the product was collected by filtration, washed 3 times with deionized water and solvent, at 60 o C drying, the product is placed in a tube furnace, with 2 o C / min rate of heating up to 400 oC, calcined for 4 h, and the mesoporous titanium dioxide balls were obtained after cooling with the furnace. Take the mesoporous titanium dioxide ball, add deionized water with a mass ratio of 1:50 to the mesoporous titanium dioxide ball, and then add manganese nitrate, cerium chloride, and ammonium tungstate to make the mass of manganese oxide, cerium oxide, and tungsten The mass of oxide accounts for 10%, 5%, and 5% of the total mass respectively, and the rest is titanium dioxide. The mixed solution is stirred at 90 o C was evaporated...

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Abstract

The invention relates to a preparation method of a denitration catalyst and relates to the technique field of preparation of supported denitration catalysts and the field of environment protection. The denitration catalyst takes a mesoporous titanium dioxide ball as a carrier and cerium tungsten manganese oxides as active ingredients. According to the key points of the preparation method, the mesoporous titanium dioxide ball is used as the carrier; three ingredients, namely cerium, tungsten and manganese, are supported on the surface of the mesoporous titanium dioxide ball by using an impregnation method so as to realize uniform dispersion and strong interactions of cerium, tungsten and manganese, and finally the efficient denitration catalyst is obtained through calcining. The catalyst has a mesoporous structure, so that the specific surface area of the catalyst is remarkably enlarged; by using multiple-ingredient cooperation effect, the catalytic activity of the catalyst is effectively improved; the temperature window is widened; the preparation method has the advantage of being environmentally friendly, simple in production technique and suitable for large scale industrial production, and can be used for removing nitric oxide emitted from a fixed source and a mobile source.

Description

technical field [0001] The invention relates to a method for preparing a supported catalyst based on mesoporous titanium dioxide spheres, which belongs to the technical field of nitrogen oxide purification in environmental protection. The catalyst can be used for removing nitrogen oxides emitted from stationary sources and mobile sources. Background technique [0002] Nitrogen oxides emitted by coal-fired power plants and motor vehicles are one of the main pollutants in the atmosphere. They are the culprits that cause acid rain and photochemical smog that damage the natural environment and biological health. research topics. Selective catalytic reduction (SCR) technology is the most mature among the commonly used nitrogen oxide removal technologies, among which NH 3 The research on catalytic technology as reducing agent is the most common. Vanadium-titanium catalysts have become the main commercial catalysts because of their excellent catalytic performance, but due to their...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J35/08B01D53/90B01D53/56
Inventor 张登松施利毅扈航高瑞华李红蕊张剑平
Owner SHANGHAI UNIV
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