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Method for preparing low-temperature selective catalytic reduction denitration catalyst with ultrasonic impregnation method

A denitrification catalyst, ultrasonic technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, catalyst activation/preparation, etc., can solve the problems of low catalytic performance of catalysts and drop below 200°C, and achieve anti-SO2 poisoning performance, The effect of increased load capacity and low production cost

Inactive Publication Date: 2017-05-31
YANCHENG FUHUA ENVIRONMENT PROTECTION IND DEV CO LTED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the temperature of the flue gas will drop below 200°C after dust removal and desulfurization, and the catalytic performance of commonly used catalysts at this temperature is extremely low. Therefore, the research and development of low-temperature SCR catalysts that match this temperature has become a hot spot for researchers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: A method for preparing a low-temperature selective catalytic reduction denitrification catalyst by ultrasonic impregnation. The steps of the method are as follows: Step 1: Fully mix and stir the attapulgite raw soil and concentrated sulfuric acid, and then mix the obtained attapulgite with the Move the concentrated sulfuric acid mixture to a muffle furnace and roast at a certain temperature to obtain a white solid;

[0024] Step 2: adding soluble manganese salts into distilled water to form a manganese precursor solution, then adding the white solid obtained in step 1 into the mixed solution, and stirring to form a suspension;

[0025] Step 3: Move the suspension obtained in step 2 to an ultrasonic instrument, and set a certain temperature for ultrasonic impregnation for a period of time;

[0026] Step 4: Suction filter the suspension to obtain a solid, and set a certain temperature in a drying oven to dry;

[0027] Step 5: move the dried solid to a muffle f...

Embodiment 2

[0035] Example 2: A method for preparing a low-temperature selective catalytic reduction denitrification catalyst by ultrasonic impregnation. The steps of the method are as follows: Step 1: Fully mix and stir the attapulgite raw soil and concentrated sulfuric acid, and then mix the obtained attapulgite with the Move the concentrated sulfuric acid mixture to a muffle furnace and roast at a certain temperature to obtain a white solid;

[0036] Step 2: adding soluble manganese salts into distilled water to form a manganese precursor solution, then adding the white solid obtained in step 1 into the mixed solution, and stirring to form a suspension;

[0037] Step 3: Move the suspension obtained in step 2 to an ultrasonic instrument, and set a certain temperature for ultrasonic impregnation for a period of time;

[0038] Step 4: Suction filter the suspension to obtain a solid, and set a certain temperature in a drying oven to dry;

[0039] Step 5: move the dried solid to a muffle f...

Embodiment 3

[0047] Example 3: A method for preparing a low-temperature selective catalytic reduction denitrification catalyst by ultrasonic impregnation. The steps of the method are as follows: Step 1: Fully mix and stir the attapulgite raw soil and concentrated sulfuric acid, and then mix the obtained attapulgite with the Move the concentrated sulfuric acid mixture to a muffle furnace and roast at a certain temperature to obtain a white solid;

[0048] Step 2: adding soluble manganese salts into distilled water to form a manganese precursor solution, then adding the white solid obtained in step 1 into the mixed solution, and stirring to form a suspension;

[0049] Step 3: Move the suspension obtained in step 2 to an ultrasonic instrument, and set a certain temperature for ultrasonic impregnation for a period of time;

[0050] Step 4: Suction filter the suspension to obtain a solid, and set a certain temperature in a drying oven to dry;

[0051] Step 5: move the dried solid to a muffle f...

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Abstract

The invention relates to a method for preparing a low-temperature selective catalytic reduction denitration catalyst with an ultrasonic impregnation method. The method is characterized by comprising the following steps: step 1: sufficiently mixing and uniformly mixing raw attapulgite with concentrated sulfuric acid; transferring a mixed solution into a muffle furnace and roasting at certain temperature to obtain a white solid; step 2: adding soluble salt of manganese into distilled water to prepare a precursor solution of the manganese, and adding the white solid obtained by the step 1 into a mixed solution; stirring to form a suspension solution; step 3: transferring the suspension solution obtained by the step 2 into an ultrasonic apparatus and carrying out ultrasonic impregnation reaction at certain temperature for a period of time; step 4: filtering the suspension solution to obtain a solid, and drying at the certain temperature in a drying box; step 5, transferring the dried solid into the muffle furnace and roasting at the certain temperature; cooling and grinding to obtain the needed catalyst.

Description

technical field [0001] The invention relates to a preparation method, in particular to a method for preparing a low-temperature selective catalytic reduction denitrification catalyst by an ultrasonic impregnation method, and belongs to the technical field of nitrogen oxide treatment in flue gas discharged from large domestic coal-fired power plants. Background technique [0002] In recent years, with the rapid development of industrial technology, the human demand for coal, oil, and natural gas has gradually increased year by year, coupled with the rapid increase in the number of motor vehicles, it has inevitably caused serious pollution to the atmospheric environment. Nitrogen oxides (NO x ) is one of the main culprits causing air pollution, 70% of NO x Emissions come from industrial production, especially coal-fired power plants, etc., NO x It is highly toxic, and if discharged into the atmosphere, it will cause great harm to human health, living environment and ecologic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01D53/86B01D53/56
CPCB01J23/34B01D53/8628B01D2258/0283B01J37/0207
Inventor 顾韵婕安玉亭
Owner YANCHENG FUHUA ENVIRONMENT PROTECTION IND DEV CO LTED
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