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Nanorod-like low-temperature denitration catalyst and preparation method thereof

A nano-rod-shaped, low-temperature denitration technology, applied in chemical instruments and methods, heterogeneous catalyst chemical elements, physical/chemical process catalysts, etc., can solve the problems of high cost, pollution caused by production and use, and difficult disposal of waste catalysts. To achieve the effect of improving activity, uniform distribution, and reducing agglomeration

Active Publication Date: 2016-06-01
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its application field is limited to specific industries such as coal-fired power plants, and its cost is high. It will cause pollution during production and use, and it is difficult to dispose of spent catalysts. The reaction temperature is also limited to above 350°C.

Method used

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  • Nanorod-like low-temperature denitration catalyst and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0032] A nanorod-shaped low-temperature denitration catalyst, the preparation method of which comprises the following steps:

[0033] 1) After mixing tetra-n-butyl titanate, absolute ethanol, glacial acetic acid and ethyl acetoacetate evenly, add template agent (the molar ratio of hexadecyltrimethylammonium bromide and polyethylene glycol 600 is 1: 0.3), stir evenly to get TiO 2 Sol, wherein the molar ratio of tetrabutyl titanate, absolute ethanol, glacial acetic acid, ethyl acetoacetate and templating agent is 1:3:0.5:0.3:0.5;

[0034] 2) Dissolve manganese acetate hydrate in distilled water to prepare manganese acetate solution, wherein the molar ratio of manganese acetate tetra-n-butyl titanate is 0.35:1, the concentration of manganese acetate solution is 0.5mol / L, manganese acetate and tetrabutyl titanate The molar ratio of the Mn element and the Ti element introduced by the ester is 0.3; under stirring conditions, the manganese acetate solution will be dripped into the T...

Embodiment 2

[0042] A nanorod-shaped low-temperature denitration catalyst, the preparation method of which comprises the following steps:

[0043] 1) After mixing tetra-n-butyl titanate, absolute ethanol, glacial acetic acid and ethyl acetoacetate evenly, add template agent (the molar ratio of hexadecyltrimethylammonium bromide and polyethylene glycol 600 is 1: 0.4), stir evenly to get TiO 2 Sol, wherein the molar ratio of tetrabutyl titanate, absolute ethanol, glacial acetic acid, ethyl acetoacetate and templating agent is 1:3.5:0.6:0.4:1.0;

[0044] 2) Dissolve manganese acetate hydrate in distilled water to prepare manganese acetate solution, wherein the molar ratio of manganese acetate to tetra-n-butyl titanate is 0.4:1, the concentration of manganese acetate solution is 0.5mol / L, manganese acetate and tetra-n-butyl titanate The molar ratio of the Mn element and the Ti element introduced by butyl ester respectively is 0.4; 2 In the sol, the dropping speed is 2 seconds / drop, and the s...

Embodiment 3

[0051] A nanorod-shaped low-temperature denitration catalyst, the preparation method of which comprises the following steps:

[0052] 1) After mixing tetra-n-butyl titanate, absolute ethanol, glacial acetic acid and ethyl acetoacetate evenly, add template agent (the molar ratio of hexadecyltrimethylammonium bromide and polyethylene glycol 600 is 1: 0.5), stir evenly to get TiO 2 Sol, wherein the molar ratio of tetrabutyl titanate, absolute ethanol, glacial acetic acid and ethyl acetoacetate and templating agent is 1:4:0.7:0.5:1.5;

[0053] 2) Dissolve manganese acetate hydrate in distilled water to prepare manganese acetate solution, wherein the molar ratio of manganese acetate to tetra-n-butyl titanate is 0.45:1, the concentration of manganese acetate solution is 0.5mol / L, manganese acetate and tetra-n-butyl titanate The molar ratio of Mn element and Ti element that butyl ester introduces respectively is 0.5; Under agitation condition, will drop by constant pressure dropping...

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Abstract

The invention discloses a nanorod-like low-temperature denitration catalyst. TiO2 of anatase is taken as a carrier and manganite is taken as an active component; the length-diameter ratio of nanorod is (10 to 20):1. The nanorod-like low-temperature denitration catalyst is prepared by adopting an improved sol-gel method and is particularly prepared by the following steps of firstly, uniformly mixing and stirring tetra-n-butyl titanate, ethanol, acetic acid and ethyl acetoacetate, adding a template agent for fully stirring, dropping a manganese acetate solution into a mixed solution, and dropping while stirring; after the dropping is finished, continuously stirring, and then heating an obtained solution in a water bath to obtain a gel substance; drying the gel substance, performing roasting treatment on the dried gel substance, and finally performing ultraviolet radiation on a product to obtain a final product. Compared with a traditional MnOx / TiO2 low-temperature denitration catalyst, the nanorod-like low-temperature denitration catalyst prepared by a preparation method disclosed by the invention has the characteristics of better nanorod-like structure, greater specific surface area, more Lewis acid sites, higher lattice oxygen content, high removal rate of nitrogen oxide and the like.

Description

technical field [0001] The invention belongs to the field of industrial flue gas treatment, and in particular relates to a nano-rod low-temperature denitrification catalyst and a preparation method thereof. Background technique [0002] NO x It is one of the main components of industrial flue gas emissions, and is the chief culprit of acid rain, photochemical pollution and other phenomena. With the increasing emissions, nitrogen oxides have seriously affected the normal life of human beings. With my country's "Twelfth Five-Year Plan" strict requirements on flue gas emission standards, flue gas treatment, especially the reduction of nitrogen oxides, is imminent. [0003] At present, the more mature nitrogen oxide emission reduction technologies mainly include: selective non-catalytic reduction (SNCR), selective catalytic reduction (SCR) and staged combustion. Among them, selective catalytic reduction technology (SCR) is currently the most widely used stationary source fuel ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J35/10B82Y30/00B82Y40/00B01D53/86B01D53/56
CPCB01D53/8628B82Y30/00B82Y40/00B01J23/34B01J2523/00B01J35/60B01J2523/47B01J2523/72
Inventor 谢峻林崔海峰何峰李凤祥方德胡华
Owner WUHAN UNIV OF TECH
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