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Denitration catalyst

A denitration catalyst and catalyst technology are applied in the field of denitration catalysts, which can solve the problems of catalyst poisoning reaction and catalyst deactivation, and achieve the effects of promoting the occurrence of the reaction, high catalytic activity, and preventing S poisoning.

Inactive Publication Date: 2018-06-08
SHENZHEN JINGTE INTELLIGENT MFG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Denitration catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 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;

[0027] 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;

[0028] S3. Continue to immerse the sample treated in step S2 in the Ti sol prepared in step S1, repeat step S2 twice, and then transfer the sample to a muffle furnace for sintering at 200°C;

[0029] S4. Active material preparatio...

Embodiment 2

[0035] 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;

[0036] 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;

[0037] S3. Continue to immerse the sample treated in step S2 in the Ti sol prepared in step S1, repeat step S2 for 3 times, and then transfer the sample to a muffle furnace for roasting at 190°C;

[0038] S4. Active material ...

Embodiment 3

[0044] 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;

[0045] 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;

[0046] S3. Continue to immerse the sample treated in step S2 in the Ti sol prepared in step S1, repeat step S2 for 5 times, and then transfer the sample to a muffle furnace for roasting at 200°C;

[0047] S4. Active material p...

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Abstract

The invention discloses a denitration catalyst. The catalyst provides a substrate foam ceramic and a catalyst composite oxide MnOx-CuSO4 supported on a substrate; and the preparation method of the catalyst comprises the following steps: supporting a prepared Ti sol on the foam ceramic, performing drying, performing calcination, supporting an activated substance, and finally performing secondary calcination molding to obtain the catalyst. According to the catalyst provided by the invention, N2 is used as a preparation atmosphere in the preparation process, and the prepared catalyst has high low-temperature denitration activity, a wider active temperature window, and very good SO2 poisoning resistant capability; and the product is the monolithic catalyst, and can be applied to treatment of industrial actual flue gases.

Description

technical field [0001] The invention relates to the field of denitration catalysts, in particular to 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 escape rate is low (the esc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/053B01J37/08B01J37/03B01D53/86B01D53/56
CPCB01D53/8628B01J27/053B01J37/03B01J37/08B01D2258/0283B01J35/397
Inventor 不公告发明人
Owner SHENZHEN JINGTE INTELLIGENT MFG TECH CO LTD
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