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Preparation method of denitration catalyst

A denitration catalyst and catalyst technology are applied in the field of denitration catalysts, which can solve problems such as catalyst poisoning reaction and catalyst deactivation, and achieve the effects of promoting reaction, high catalytic activity and improving destocking activity.

Inactive Publication Date: 2018-05-29
SHENZHEN JINGTE INTELLIGENT MFG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to impurities such as sulfur oxides in the flue gas, the catalyst will be poisoned and deactivated.

Method used

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  • Preparation method of denitration catalyst

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Experimental program
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Effect test

Embodiment 1

[0032] S1. Preparation of Ti sol: Mix 15wt% tetrabutyl titanate, 2wt% hexadecyltrimethylammonium bromide, and 72wt% absolute ethanol and place them in a 90kHz ultrasonic wave for 0.5h. After stirring, take 11wt% distilled water was added dropwise to the above mixed solution and placed in an ultrasonic wave to continue stirring for 0.5h. The above two stirring stages were fed with N2 at a flow rate of 10mL / min, and the stirring temperature was 20°C;

[0033] S2. Put the Ti sol treated in step S1 in an environment with a temperature of 5° C., immerse the formed foam ceramics with a pore size of 50 nm in the Ti sol for 24 hours, then take out the foam ceramics and place them in a vacuum drying oven for 4 hours, and dry them. The temperature is 110°C. During the sample drying process, the sample is placed in the rotator and turned up and down at a constant speed of 50 rpm. After the drying is completed, the moisture content is tested, and it can be taken out after passing the test;...

Embodiment 2

[0041] S1. Preparation of Ti sol: Take 17wt% tetrabutyl titanate, 5wt% cetyltrimethylammonium bromide, 65wt% absolute ethanol and mix them in a 70kHz ultrasonic wave for 1h. After the stirring is completed, take 13wt% distilled water was added dropwise to the above mixed solution and placed in an ultrasonic wave to continue stirring for 0.5h. The above two stirring stages were fed with N at a flow rate of 30mL / min. 2 , the stirring temperature is 20°C;

[0042] S2. Put the Ti sol treated in step S1 in an environment with a temperature of 5° C., immerse the formed foam ceramics with a pore size of 60 nm in the Ti sol for 20 hours, then take out the foam ceramics and place them in a vacuum drying oven for 6 hours, and dry them. The temperature is 120°C. During the sample drying process, the sample is placed in the rotator and turned up and down at a constant speed of 70 rpm. During the sample drying process, the sample is placed in the rotator and turned up and down at a constan...

Embodiment 3

[0050] S1. Preparation of Ti sol: Mix 20wt% tetrabutyl titanate, 7wt% hexadecyltrimethylammonium bromide, and 60wt% absolute ethanol and place them in a 100kHz ultrasonic wave for 1 hour. After stirring, take 13wt % distilled water was added dropwise to the above mixed solution and placed in an ultrasonic wave to continue stirring for 1 h. The above two stirring stages were fed with N at a flow rate of 50 mL / min. 2 , the stirring temperature is 25°C;

[0051] S2. Put the Ti sol treated in step S1 in an environment with a temperature of 15° C., immerse the formed foam ceramics with a pore size of 50 nm in the Ti sol for 15 hours, then take out the foam ceramics and place them in a vacuum drying oven for 8 hours, and dry them. The temperature is 130°C. During the sample drying process, the sample is placed in the rotator and turned up and down at a constant speed of 60 rpm. During the sample drying process, the sample is placed in the rotator and turned up and down at a constant...

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Abstract

The invention discloses a preparation method of a denitration catalyst. According to the catalyst, matrix foam ceramic and a catalyst composite oxide MnOx-CuSO4 supported on the substrate are provided. The preparation method comprises the following steps: preparing a Ti sol, supporting the Ti sol on the foam ceramic, carrying out calcining and drying, supporting an activation substance, and finally carrying out calcining and forming again. In the preparation process, N2 is used as a preparation atmosphere. The prepared catalyst has high denitration activity at low temperature, the active temperature window is relatively wider, and good SO2 poisoning resistance is achieved. The denitration catalyst is an integral catalyst, and can be applied to industrial practical flue gas treatment.

Description

technical field [0001] The invention relates to the field of denitration catalysts, in particular to a preparation method of a denitration catalyst. Background technique [0002] The use of fossil fuels such as petroleum and coal is also increasing year by year, so that the released pollutants such as nitrogen oxides, sulfur oxides and dust have caused serious pollution to the atmosphere, and for a long time in the future, fossil fuels such as coal will It is still the main source of energy in our country, such as the thermal power industry, more than 95% of which are based on burning coal. The emission reduction of nitrogen oxides has begun to attract people's attention. [0003] Among many denitrification technologies, the SCR method can meet the increasingly stringent NOx requirements due to its high removal rate of nitrogen oxides. x In addition, the denitrification reaction does not require a high reaction temperature, the equipment is easy to install, the ammonia esc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/055B01D53/86B01D53/56B01J37/02B01J37/04B01J37/08B01J37/34
CPCB01D53/8628B01J27/055B01J37/0205B01J37/0211B01J37/0213B01J37/04B01J37/082B01J37/088B01J37/343
Inventor 不公告发明人
Owner SHENZHEN JINGTE INTELLIGENT MFG TECH CO LTD
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