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Low temperature flue gas denitration catalyst and preparation method thereof

A denitrification catalyst and low-temperature flue gas technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problem of no catalyst found, achieve excellent denitrification effect, low production cost, and easy implementation

Active Publication Date: 2015-12-09
JIANGSU XI YANGYANG ENVIRONMENTAL PROTECTION EQUIP SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Catalyst is the core of flue gas denitrification technology, and the most effective catalyst has not been found in the world so far.

Method used

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  • Low temperature flue gas denitration catalyst and preparation method thereof
  • Low temperature flue gas denitration catalyst and preparation method thereof
  • Low temperature flue gas denitration catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The preparation method of the low-temperature flue gas denitrification catalyst of the present invention comprises the following steps:

[0045] 1. Preparation of TiO 2 -SiO 2 composite oxide carrier

[0046] (a) take by weighing 16gTiOSO 4 Adding temperature is in the water bath of 40~80 ℃, stirring and dissolving, add 20g silica sol (containing 30wt% SiO 2 ), stirring and standing for 1h to obtain a mixed solution;

[0047] (b) Add dropwise 25wt% ammonia solution in the mixed solution, control the pH value to be 10-11, and generate a suspension;

[0048] (c) The resulting suspension is left standing at 40° C. for 10 h; then filtered and washed to obtain a precursor material;

[0049] (d) drying the obtained precursor material at 110° C. for 10 h, and grinding the dried solid into powder;

[0050] (e) Calcinate the ground powder at 550°C for 5h, and then sieve the obtained powder to obtain TiO with less than 100 mesh 2 -SiO 2 Composite oxide support, among them...

Embodiment 2

[0073] MnOx-CeO 2 / TiO 2 -SiO 2 The synthesis steps of low-temperature flue gas denitrification catalyst are basically the same as in Example 1, only the amount of cerium nitrate added is changed, and 0.504g of cerium nitrate and the prepared 2gMnOx / TiO 2 -SiO 2 Catalyst, obtain target product: MnOx-CeO 2 / TiO 2 -SiO 2 Low temperature flue gas denitrification catalyst. where CeO 2 The loading amount is 10wt%.

Embodiment 3

[0075] MnOx-CeO 2 / TiO 2 -SiO 2 The synthesis steps of low-temperature flue gas denitrification catalyst are basically the same as in Example 1, only the amount of cerium nitrate added is changed, and 0.757g of cerium nitrate and the prepared 2gMnOx / TiO 2 -SiO 2 Catalyst, obtain target product: MnOx-CeO 2 / TiO 2 -SiO 2 Low temperature flue gas denitrification catalyst. where CeO 2 The loading amount is 15wt%.

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Abstract

The invention discloses a low temperature flue gas denitration catalyst and a preparation method thereof. The catalyst is represented by a general formula of MnOX-CeO2 / TiO2-SiO2, wherein TiO2-SiO2 is a composite oxide carrier, a molar ratio of TiO2 to SiO2 is 1:0.5-1.5, MnOX and CeO2 are active components of the catalyst, the load capacity of MnOX is 0.5-2wt%, and the load capacity of CeO2 is 5-15wt%. The catalyst can realize ammonia selective catalytic reduction of nitrogen oxides into harmless nitrogen and water at 100-180DEG C, has a highest denitration efficiency reaching 96%, and has an excellent denitration effect; and the preparation method has the advantages of clear steps, simple operation and easy enforcement.

Description

technical field [0001] The invention relates to a catalyst and a preparation method thereof, in particular to a low-temperature flue gas denitrification catalyst and a preparation method thereof, and belongs to the field of flue gas emission control in the atmospheric environment. Background technique [0002] NOx is the main pollutant that causes a series of problems such as acid rain, photochemical smog, and the hole in the ozone layer. It is also a key and difficult point in the current atmospheric environmental protection. Therefore, how to effectively control NOx has become an important topic of concern in environmental protection. Catalyst is the core of flue gas denitrification technology, and the most effective catalyst has not been found in the world so far. Experts and scholars from various countries are also actively committed to the research and improvement of catalysts. Under the background that my country's energy and environmental issues have attracted more ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01D53/56B01D53/86B01D53/94
Inventor 罗驹华毛洪凯姚为王旭杜建周
Owner JIANGSU XI YANGYANG ENVIRONMENTAL PROTECTION EQUIP SCI & TECH CO LTD
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