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A low -temperature sulfur sulfur -tolerant drooling dark catalyst

A denitrification catalyst and catalyst technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of low denitrification efficiency, difficult decomposition, catalyst poisoning and deactivation of vanadium-titanium catalysts, etc., to achieve The effects of low denitrification efficiency attenuation and excellent low temperature sulfur resistance performance

Active Publication Date: 2020-02-28
邢台旭阳科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the temperature of some industrial boiler exhaust gas, coke oven flue gas and other industrial exhaust gas is mostly below 300°C, so the denitrification catalyst used in coal-fired power plants is not suitable for these medium and low temperature flue gases, because it is under the condition of medium and low temperature flue gas , the denitrification efficiency of the vanadium-titanium catalyst used is relatively low, and the SO in the flue gas x The formed sulfates are adsorbed on the surface of the catalyst and are difficult to decompose, thus occupying the active sites of the catalyst, leading to catalyst poisoning and deactivation

Method used

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  • A low -temperature sulfur sulfur -tolerant drooling dark catalyst
  • A low -temperature sulfur sulfur -tolerant drooling dark catalyst
  • A low -temperature sulfur sulfur -tolerant drooling dark catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Take 10 g of the carrier, and test the saturated water absorption (solid-to-liquid ratio) of the carrier by the equal-volume impregnation method.

[0037] Take 10g of titanium dioxide carrier and impregnate Mn(NO 3 ) 2 ·5H 2 O and K 2 TeO 3 、H 2 PtCl 6 In the mixed aqueous solution, the masses of Mn, Te and Pt in the mixed aqueous solution are 1g, 0.05g and 0.01g respectively, impregnated at room temperature for 24h, then vacuum-dried at 60°C for 5h, then vacuum-dried at 110°C for 10h, and finally in the muffle furnace Calcined at 450°C for 3 hours in an air atmosphere to obtain a finished catalyst, denoted as Mn 10 -Te 0.5 -Pt 0.1 / Ti.

Embodiment 2

[0039] Take 10g of titanium dioxide carrier and impregnate Mn(NO 3 ) 2 ·5H 2 O and K 2 TeO 3 、H 2 PtCl 6 In the mixed aqueous solution, the masses of Mn, Te and Pt in the mixed aqueous solution are 1g, 0.1g and 0.01g respectively, impregnated at room temperature for 24h, then vacuum-dried at 60°C for 5h, then vacuum-dried at 110°C for 10h, and finally in the muffle furnace Calcined at 450°C for 3 hours in an air atmosphere to obtain a finished catalyst, denoted as Mn 10 -Te 1 -Pt 0.1 / Ti.

Embodiment 3

[0041] Take 10g of titanium dioxide carrier and impregnate Mn(NO 3 ) 2 ·5H 2 O and K 2 TeO 3 、H 2 PtCl 6 In the mixed aqueous solution, the masses of Mn, Te and Pt in the mixed aqueous solution are 1g, 0.2g and 0.05g respectively, impregnated at room temperature for 24h, then vacuum-dried at 60°C for 5h, then vacuum-dried at 110°C for 10h, and finally in the muffle furnace Calcined at 450°C for 3 hours in an air atmosphere to obtain a finished catalyst, denoted as Mn 10 -Te2 -Pt 0.5 / Ti.

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Abstract

The invention relates to a medium-low temperature sulfur tolerant flue gas denitration catalyst and a preparation method thereof. The catalyst comprises a carrier, an active component and additives, wherein the carrier is anatase titanium dioxide, the active component is a salt or oxide of Mn, and the additives are salts, oxides or elementary substances of Te and Pt. The denitration catalyst at least can reach denitration efficiency of 80% or above under a SO2 free condition and within a whole temperature range of 150DEG C-400DEG C, and also has excellent low temperature and sulfur tolerant performance. Under the conditions of 150-400DEG C and a SO2 content of not higher than 300ppm, the denitration efficiency attenuation does not exceed 1% within 20h, and attenuation does not continue further. Moreover, after decrease of SO2 content, the denitration efficiency can rise again to an original level, i.e. the denitration catalyst provided by the invention is not permanently affected by sulfur.

Description

technical field [0001] The invention relates to the field of medium and low temperature flue gas denitrification catalysts, in particular to a medium and low temperature sulfur resistant flue gas denitrification catalyst and a preparation method thereof. Background technique [0002] Nitrogen oxide is one of the main sources of air pollution, and it is also a major factor that directly leads to smog weather, ozone destruction, and air pollution in various parts of my country. Nitrogen oxides in industrial tail gas are the main source of nitrogen oxides in the atmosphere, such as coal-fired power plants , glass kiln, cement kiln and coke oven flue gas, etc. At present, the selective catalytic reduction (NH 3 -SCR) technology. [0003] The denitrification catalyst is NH 3 -The core of SCR technology, its performance is the main factor to determine the effect and economy of the whole denitrification system. At present, the flue gas temperature of coal-fired power plants is mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/057B01D53/86B01D53/56
CPCB01D53/8628B01D2255/1021B01D2255/2073B01D2255/70B01J27/0576
Inventor 张英伟朱春梅杨洪庆曾志春王鹏慧
Owner 邢台旭阳科技有限公司
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