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Wide-temperature-window efficient denitration catalyst as well as preparation method and application thereof

A denitrification catalyst, wide temperature technology, applied in the direction of chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of poisoning and deactivation catalyst use efficiency, low, etc., to improve low temperature denitrification activity and water resistance Sulfur performance, simple preparation process, and the effect of improving operating economy

Pending Publication Date: 2020-12-04
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a high-efficiency denitration catalyst with a wide temperature window and its preparation method and application in order to solve the problems of poisoning and deactivation of the high temperature denitration catalyst in the prior art and the low efficiency of the catalyst.

Method used

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  • Wide-temperature-window efficient denitration catalyst as well as preparation method and application thereof
  • Wide-temperature-window efficient denitration catalyst as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] The NO catalyst for catalytic reduction made according to the present invention, wherein the molar ratio of active components is Mn, Dy, Al 2 o 3 The ratio of palygorskite to palygorskite is 1:0.05:0.04:1. Concrete preparation steps are as follows:

[0034] (1) Place palygorskite in deionized water and disperse to form a suspension slurry, stir at room temperature for 4h, and let stand for 1h to prepare a palygorskite slurry with a solid content of 4g / 100ml, which is recorded as solution 1;

[0035] (2) At room temperature, 2.5mol of AlCl 3 Place in a three-necked flask, add 1.5mol / L 125ml of NaOH solution dropwise, stir vigorously to form a milky white solution, then add 250ml of solution 1 to the above solution, stir vigorously at 80°C for 2h, then put the above The NaOH solution of 42ml is added in the solution until the pH value of the supernatant becomes neutral, and is recorded as solution 2;

[0036](3) Add 1 mol of manganese sulfate, 0.05 mol of dysprosium s...

Embodiment 2

[0040] The NO catalyst for catalytic reduction made according to the present invention, wherein the molar ratio of active components is Mn, Dy, Al 2 o 3 The ratio of palygorskite and palygorskite is 1:0.1:0.04:1. Concrete preparation steps are as follows:

[0041] (1) Place palygorskite in deionized water and disperse to form a suspension slurry, stir at room temperature for 4h, and let stand for 1h to prepare a palygorskite slurry with a solid content of 4g / 100ml, which is recorded as solution 1;

[0042] (2) At room temperature, 2.5mol of AlCl 3 Place in a three-necked flask, add 1.5mol / L 125ml of NaOH solution dropwise, stir vigorously to form a milky white solution, then add 250ml of solution 1 to the above solution, stir vigorously at 80°C for 2h, then put the above The NaOH solution of 42ml is added in the solution until the pH value of the supernatant becomes neutral, and is recorded as solution 2;

[0043] (3) 1mol of manganese sulfate, 0.1mol of dysprosium sulfate...

Embodiment 3

[0047] The NO catalyst for catalytic reduction made according to the present invention, wherein the molar ratio of active components is Mn, Dy, Al 2 o 3 The ratio of palygorskite to palygorskite is 1:0.2:0.04:1. Concrete preparation steps are as follows:

[0048] (1) Place palygorskite in deionized water and disperse to form a suspension slurry, stir at room temperature for 4h, and let stand for 1h to prepare a palygorskite slurry with a solid content of 4g / 100ml, which is recorded as solution 1;

[0049] (2) At room temperature, 2.5mol of AlCl 3 Place in a three-necked flask, add 1.5mol / L 125ml of NaOH solution dropwise, stir vigorously to form a milky white solution, then add 250ml of solution 1 to the above solution, stir vigorously at 80°C for 2h, then put the above The NaOH solution of 42ml is added in the solution until the pH value of the supernatant becomes neutral, and is recorded as solution 2;

[0050] (3) 1mol of manganese sulfate, 0.2mol of dysprosium sulfate ...

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Abstract

The invention relates to the technical field of wide-temperature-window denitration catalysts, in particular to a wide-temperature-window efficient denitration catalyst and a preparation method and anapplication thereof. The manganese and dysprosium serve as active components of the catalyst, and aluminum oxide and palygorskite are mixed to form a carrier; wherein the molar ratio of the manganeseelement to the dysprosium element to the aluminum oxide to the palygorskite is 1: 0.05-0.2: 0.04: 1. Compared with the prior art, the catalyst provided by the invention shows relatively high denitration activity and water and sulfur resistance in a wide temperature range, and is beneficial to arranging an SCR denitration device in a tail flue of a thermal power plant, so that the waste heat lossis reduced, and the operation economy of the thermal power plant is improved.

Description

technical field [0001] The invention relates to the technical field of wide temperature window denitration catalysts, in particular to a wide temperature window high-efficiency denitration catalyst and its preparation method and application. Background technique [0002] Nitrogen oxides emitted from industrial fumes have caused serious air pollution and environmental problems, including acid rain, photochemical smog, and the greenhouse effect. The main source of nitrogen oxides is the exhaust gas from coal-fired power plants. So far, the use of NH 3 Selective catalytic reduction (SCR) has been shown to remove NO x the most effective way. Since the 1970s, V 2 o 5 -WO 3 (MoO 3 ) / TiO 2 Catalysts have been used in the development of industrial raw materials, but vanadium-based catalysts have some unavoidable disadvantages, such as the toxicity of vanadium, NH 3 to N 2 Over-oxidation of O, narrow high-temperature reaction window of 300-400°C, etc. Due to the high operat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01D53/86B01D53/56
CPCB01J23/34B01D53/8628
Inventor 郭瑞堂刘源桢段超鹏吴桂林苗雨芳顾婧雯潘卫国
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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