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Cerium copper titanium composite oxide catalyst for flue gas denitration, preparation method and using method

A technology of composite oxides and catalysts, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of selectivity, sulfur resistance, poor water resistance, and activity low cost, simple use conditions and strong adaptability

Active Publication Date: 2011-01-26
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of poor activity of catalysts reported in the past, or poor selectivity, sulfur resistance, and water resistance, and provide a cerium-copper-titanium composite oxide catalyst for flue gas denitrification and its preparation and Instructions

Method used

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  • Cerium copper titanium composite oxide catalyst for flue gas denitration, preparation method and using method
  • Cerium copper titanium composite oxide catalyst for flue gas denitration, preparation method and using method

Examples

Experimental program
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Effect test

Embodiment 1

[0025] 4g Ce(SO 4 ) 2 4H 2 O, 2.47g CuSO 4 ·5H 2 O and 19.00g Ti(SO 4 )2·2H 2 O was dissolved in deionized water, and 20% concentrated ammonia water was added dropwise at a rate of 0.3mL / min under stirring conditions to adjust the pH=9.5. After washing and filtering to remove sulfate ions, place it in a water bath at 80°C for 4 hours, and place it in a vacuum drying oven. Dry at 50°C for 12 hours and then dry at 110°C for 4 hours. Finally, the sample was calcined at 500° C. for 5 hours to obtain the catalyst sample. All samples were sieved into 40-60 mesh size particles and powder for later use.

Embodiment 2

[0027] Put 0.05g of the catalyst powder sample of Example 1 into a physical / chemical adsorption apparatus for BET testing. The test was carried out by the AUTOSORB-1-C physical / chemical adsorption instrument produced by Quanta Corporation of the United States. The BET result shows that the specific surface area of ​​the catalyst is 170.6m 2 / g, the total pore volume is 0.458cc / g, and the average pore diameter is

Embodiment 3

[0029] A certain amount of catalyst powder sample of Example 1 is taken, and X-ray diffraction is performed on the sample, and its diffraction pattern is analyzed to obtain the composition of the material, the structure and shape of the atomic molecules inside the material. The test instrument is X`Pert PRO from PANalytical Company. Analyzing Diffraction Patterns figure 1 It can be seen that the catalyst is in an amorphous form, without the existence of anatase crystal form and copper oxide crystal, and the three elements of cerium, copper and titanium are widely and uniformly distributed on the catalyst, which proves that the catalyst has a cerium-copper-titanium composite oxide crystal structure.

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Abstract

The invention discloses a cerium copper titanium composite oxide catalyst for flue gas denitration and a preparation method. The catalyst comprises the following components: CeO2, CuO and TiO2. The catalyst is prepared by a coprecipitation method and can promote the generation of an ideal denitration effect. The catalyst has the advantages that: 1) the catalyst has the high activity for the catalytic reduction of nitric oxides in flue gas; 2) the adaptive temperature window of the catalyst is wide, namely the catalyst has certain activity within the integral temperature range from 150 to 450 DEG C; 3) the operating performance of the catalyst under the condition of SO2 and H2O can be improved effectively, and the catalyst has the strong adaptivity to severe working conditions in the presence of sulfur dioxide, water and the like and has the wide application range; 4) raw materials for preparation are easy to obtain, a preparation process is simple and the cost of the catalyst is low.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a cerium-copper-titanium composite oxide catalyst used for flue gas denitrification and a preparation and use method. Background technique [0002] Nitrogen oxides (NOx) are recognized as one of the three main air pollutants, and the photochemical smog generated by the reaction with hydrocarbons seriously endangers human health; in addition, NOx is also a major cause of acid rain. According to statistics, from 2000 to 2005, the annual growth rate of NOx emissions was as high as 10%. In 2005, the total national NOx emissions exceeded 19 million tons. If no further control measures are taken, nitrogen oxides will reach about 29 million tons in 2020. Nearly 70% of my country's nitrogen oxide emissions come from the direct combustion of coal, and the power industry is a large coal-burning household in my country, so thermal power plants are one of the ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01D53/90B01D53/56
Inventor 高翔骆仲泱岑可法倪明江宋浩吴卫红钟毅张涌新徐甸施正伦周劲松方梦祥余春江王树荣程乐鸣王勤辉
Owner ZHEJIANG UNIV
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