A wide temperature window denitration catalyst and its preparation method and application

A denitration catalyst, wide temperature technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of catalyst poisoning, short catalyst service life, etc., achieve easy operation, low preparation cost, and reduce waste heat. effect of loss

Active Publication Date: 2017-01-04
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the purposes of the present invention is to provide a wide temperature window denitrification V x o y -CeO 2 -ZrO 2 catalyst

Method used

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  • A wide temperature window denitration catalyst and its preparation method and application
  • A wide temperature window denitration catalyst and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0042] A Wide Temperature Window Denitration VxOy-CeO 2 -ZrO2 Catalyst A is calculated according to the molar ratio of the contained metal elements V, Ce, and Zr, wherein V:Ce:Zr is 0.2:1:1. The preparation method of this catalyst comprises the steps:

[0043] (1) 14.47gCe(NO 3 ) 3 ·6H 2 O and 14gZr(NO 3 ) 4 ·5H 2 O is dissolved in deionized water, and a polytetrafluoroethylene stirring rod is used at a water temperature of 60-70°C, and the stirring rate is controlled at 600-1000rpm. During the stirring process, ammonia water with a concentration of 20% is slowly dripped in as a precipitant to make the pH of the mixture The value reached between 10-11 and was left to stand for 2-3 hours to obtain complete precipitation.

[0044] The amount of soluble cerium salt, soluble zirconium salt, ammonia water and deionized water used in the above preparation process is calculated by molar ratio, that is, cerium in soluble cerium salt: zirconium in soluble zirconium salt: ammonia...

Embodiment 2

[0054] A Wide Temperature Window Denitration VxOy-CeO 2 -ZrO 2 Catalyst A, calculated by the mol ratio of contained metal element V, Ce, Zr, wherein V: Ce: Zr is 0.2: 1: 1 The preparation method of this catalyst comprises the steps:

[0055] (1) 14.47gCe(NO 3 ) 3 ·6H 2 O and 14gZr(NO 3 ) 4 ·5H 2 O is dissolved in deionized water, and a polytetrafluoroethylene stirring rod is used at a water temperature of 60-70°C, and the stirring rate is controlled at 600-1000rpm. During the stirring process, ammonia water with a concentration of 20% is slowly dripped in as a precipitant to make the pH of the mixture The value reached between 10-11 and was left to stand for 2-3 hours to obtain complete precipitation.

[0056] The amount of soluble cerium salt, soluble zirconium salt, ammonia water and deionized water used in the above preparation process is calculated by molar ratio, that is, cerium in soluble cerium salt: zirconium in soluble zirconium salt: ammonia in ammonia water: ...

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Abstract

The invention relates to a wide-temperature-window denitration catalyst and a preparation method and application of the wide-temperature-window denitration catalyst. The wide-temperature-window denitration catalyst is composed of a carrier and an active component. The carrier is composed of CeO2 and ZrO2 in a blended mode, wherein the particle size of CeO2 and ZrO2 ranges from 20 nm to 40 nm. The active component is one of V2O5, V3O5 and VO2 or V2O3 or a mixture of two or more of V2O5, V3O5 and VO2 or V2O3. Ammonium metavanadate, cerous nitrate and zirconium nitrate are used as a precursor, and the wide-temperature-window denitration catalyst is prepared through the combination of the co-precipitation method and the impregnation method and can be applied to the flue gas denitration process. Compared with the prior art, the wide-temperature-window denitration catalyst and the preparation method and application of the wide-temperature-window denitration catalyst have the advantages that the preparation cost is low, industrial popularization is facilitated, and the good denitration effect is achieved when the wide-temperature-window denitration catalyst is applied to flue gas with the temperature ranging from 250 DEG C to 450 DEG C.

Description

technical field [0001] The invention relates to the field of wide temperature window flue gas denitrification, in particular to a wide temperature window denitrification catalyst and its preparation method and application. Background technique [0002] NOx is one of the important air pollutants emitted by coal-fired power plants, and is an important cause of acid rain and photochemical smog. Preliminary estimates show that during the "12th Five-Year Plan" period, the NO x Emissions will reach around 12 million tons. Since the type of acid rain in my country has changed from sulfuric acid acid rain to nitric acid and sulfuric acid mixed acid rain, it has caused great harm to the environment and human health. Therefore, NO x The control of air pollutants has become the focus of the work of air pollutant control in the national "Twelfth Five-Year Plan". [0003] Take NH 3 Selective catalytic reduction denitration technology (SCR technology) as a reducing agent is an effect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/22B01D53/90B01D53/56
Inventor 潘卫国高燕武郭瑞堂张强王青山陈其林杨柠志卢臣子
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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