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High-performance cerium titanium loaded zirconium oxide catalyst for flue gas denitrification and preparation method thereof

A zirconia and catalyst technology, which is applied in the field of cerium-titanium-supported zirconia catalyst and its preparation, can solve the problems of restricting the wide application of catalysts, poor high-temperature thermal stability, narrow operating temperature window, etc., and achieve excellent denitrification activity and high thermal stability , good thermal stability

Inactive Publication Date: 2016-07-06
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there are still deficiencies in this type of catalyst, such as active component V 2 o 5 It is toxic, has a narrow operating temperature window, and generates a large amount of greenhouse gas N at high temperature 2 O, poor thermal stability at high temperature, etc. These shortcomings restrict the wide application of this type of catalyst in the actual purification of flue gas from coal-fired power plants and exhaust gas from motor vehicles

Method used

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  • High-performance cerium titanium loaded zirconium oxide catalyst for flue gas denitrification and preparation method thereof
  • High-performance cerium titanium loaded zirconium oxide catalyst for flue gas denitrification and preparation method thereof
  • High-performance cerium titanium loaded zirconium oxide catalyst for flue gas denitrification and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1. Preparation of CeTi support

[0021] Dissolve 0.81g of cerium nitrate and 9.12g of titanium sulfate in 350mL of distilled water, stir magnetically at room temperature for 30min to mix evenly, then add concentrated ammonia water drop by drop, the concentration of concentrated ammonia water is 13.2mol L -1 , adjust the pH to 10, at 90 o Magnetic stirring in C water bath for 3h to make the precipitation complete, aging for 24h, suction filtration, washing, filter cake at 120 o C dried for 12h, ground evenly, in the air atmosphere in the muffle furnace at 550 o C is calcined for 6 hours to obtain a cerium-titanium solid solution carrier, which is marked as CeTi.

Embodiment 21Z

[0022] Example 2. 1ZrO 2 / Preparation of CeTi catalyst

[0023] Mix 1 g of CeTi carrier with ultrapure water, stir for 30 min, add 0.82 mL of 0.1 mol L -1 Zirconium nitrate solution, continue to stir for 30min, at 90 o Stir and evaporate to dryness in a C oil bath; put the sample at 120 o C drying 12h, grinding, 500 under air atmosphere in a tube furnace o C is roasted for 6h to get 1ZrO 2 / CeTi catalyst. Its XRD measurement result sees figure 1 , H 2 -TPR assay results see figure 2 , the denitrification performance test results are shown in image 3 .

Embodiment 33Z

[0024] Example 3. 3ZrO 2 / Preparation of CeTi catalyst

[0025] Mix 1 g of CeTi carrier with ultrapure water, stir for 30 min, add 2.51 mL of 0.1 mol L -1 Zirconium nitrate solution, continue to stir for 30min, at 90 o Stir and evaporate to dryness in a C oil bath; put the sample at 120 o C drying 12h, grinding, 500 under air atmosphere in a tube furnace o C is roasted for 6h to get 3ZrO 2 / CeTi catalyst. Its XRD measurement result sees figure 1 , H 2 -TPR assay results see figure 2 , the denitrification performance test results are shown in image 3 .

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Abstract

The invention discloses a cerium titanium loaded zirconium oxide catalyst.A carrier of the catalyst is an anatase-uniform cerium titanium solid solution, and zirconium oxide as an active ingredient exists on the surface of the carrier in a highly-dispersive state.The cerium titanium loaded zirconium oxide catalyst has the advantages of high thermostability and excellent oxidation-reduction performance.The catalyst has high activity and selectivity in NH3 selective catalytic reduction NO reaction and has potential application value in the field of denitrification.The invention discloses a preparation method of the catalyst.

Description

technical field [0001] The invention relates to a cerium-titanium-loaded zirconia catalyst for flue gas denitrification and a preparation method thereof. Background technique [0002] Nitrogen oxides (NOx) are one of the main pollutants that form smog, and are also the main pollutants that cause acid rain and photochemical smog, which are extremely harmful to the ecological environment and human health. NOx emissions come mainly from stationary sources (such as flue gas from large coal-fired power plants) and mobile sources (such as motor vehicle exhaust). With the rapid development of my country's economy, the energy structure with coal as the main fuel and the rapid development of the automobile industry have directly led to a sharp increase in my country's nitrogen oxide emissions in recent years, and its treatment has become urgent. In NOx emission control technology, NH 3 Selective catalytic reduction of NOx technology for reducing agent (i.e. NH 3 -SCR technology), ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10B01J37/03B01J37/02B01D53/86B01D53/56
CPCB01D53/8628B01D2258/0283B01J23/10B01J37/0201B01J37/031
Inventor 齐蕾汤琦武笑颖
Owner UNIV OF JINAN
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