Denitration catalyst and preparation method thereof

A denitrification catalyst, nitric acid technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, heterogeneous catalyst chemical elements, etc., can solve the problems of catalyst active site blockage, environmental and human hazards, equipment corrosion, etc., to improve the reaction Activity and stability, accelerated reaction speed, enhanced adsorption effect

Active Publication Date: 2019-03-12
FUJIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the active component V of the catalyst 2 o 5 High temperature and easy sublimation are harmful to the environment and human beings. At the same time, at V 2 o 5 SO 2 will be oxidized to SO 3 , and further generate NH 4 HSO 4 and (NH 4 ) 2 SO 4 , causing problems such as equipment corrosion and catalyst active site blockage

Method used

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  • Denitration catalyst and preparation method thereof
  • Denitration catalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] (1) Purification of halloysite nanotubes

[0024] Weigh 20g of halloysite nanotubes and add them to 100mL of ionized water, stir at room temperature for 30min at a rate of 700rpm, then dropwise add a certain amount of nitric acid to adjust the pH value of the solution to 3.9 and continue to stir for 1h, To remove surface and internal impurities, the mixture was filtered and washed until neutral, dried at 110°C for 12 hours, and finally roasted at 500°C for 5 hours.

[0025] (2) Surface modification of halloysite nanotubes Add purified halloysite nanotubes to deionized water, then add cerium nitrate, urea

[0026] and CTAB were stirred at room temperature for 30 min, then transferred to 90 ° C for 12 h, and then cooled to room temperature. After the product was filtered and washed, it was dried at 110 °C for 12 h, and finally calcined at 500 °C for 5 h to obtain the mesoporous CeO 2 Modified halloysite nanotubes. The mass volume ratio of halloysite nanotubes to deioni...

Embodiment 2

[0030] (1) Purification of halloysite nanotubes

[0031] Weigh 20g of halloysite nanotubes into 200mL deionized water, stir at room temperature for 30min at a rate of 700rpm, then drop a certain amount of nitric acid to adjust the pH of the solution to 4.2 and continue to stir for 1h to Remove surface and internal impurities, then filter the mixture and wash until neutral, dry at 110°C for 12 hours, and finally bake at 500°C for 5 hours.

[0032] (2) Surface modification of halloysite nanotubes Add the purified halloysite nanotubes to deionized water, then add cerium sulfate, urea

[0033]and CTAB were stirred at room temperature for 30 min, then transferred to 90 ° C for 12 h, and then cooled to room temperature. After the product was filtered and washed, it was dried at 110 °C for 12 h, and finally calcined at 500 °C for 5 h to obtain the mesoporous CeO 2 Modified halloysite nanotubes. The mass volume ratio of halloysite nanotubes to deionized water is 1:10, the mass rati...

Embodiment 3

[0037] (1) Purification of halloysite nanotubes

[0038] Weigh 20g of halloysite nanotubes and add them to 150mL deionized water, stir at room temperature for 30min at a rate of 700rpm, then drop a certain amount of nitric acid to adjust the pH of the solution to make it reach 4 and continue to stir for 1h to Remove surface and internal impurities, then filter the mixture and wash until neutral, dry at 110°C for 12 hours, and finally bake at 500°C for 5 hours. During this process, the mass volume ratio of halloysite nanotubes to deionized water was 1:7.5.

[0039] (2) Surface modification of halloysite nanotubes Add purified halloysite nanotubes to deionized water, then add cerium nitrate, urea

[0040] and CTAB were stirred at room temperature for 30 min, then transferred to 90 ° C for 12 h, and then cooled to room temperature. After the product was filtered and washed, it was dried at 110 °C for 12 h, and finally calcined at 500 °C for 5 h to obtain the mesoporous CeO 2 M...

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Abstract

The invention discloses a denitration catalyst and a preparation method thereof. The method includes the steps: halloysite nano-tube purification; halloysite nano-tube surface modification; active component loading. The catalyst is prepared by the aid of a technological means combining a deposition precipitation method and a sol-gel method, and the catalyst takes a mesoporous CeO2 modified halloysite nano-tube as a carrier and takes magnesium vanadium oxide as an active component. The catalyst has higher specific surface area and can have high catalytic activity and reaction stability within the range of 250-450 oC and is high in SO2 poisoning resistance.

Description

technical field [0001] The invention belongs to the technical field of environmental catalysis, and in particular relates to a denitrification catalyst and a preparation method thereof. Background technique [0002] With the rapid development of science and technology, human beings are making full use of mineral resources such as coal, oil, and natural gas to enrich and improve their living standards. At the same time, due to the use of fossil fuels, a large amount of harmful gases will be produced, which makes human beings face increasingly serious environmental problems. pollution problem. Among the many pollutants, nitrogen oxides in the tail gas discharged from coal-fired power plants and industrial boilers are one of the main air pollutants in my country. The existence of this pollutant has caused great harm to human health and the ecological environment. Industrial removal of NO from flue gas x The most widely used denitrification technology is based on NH 3 As a re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22B01J37/03B01J35/10B01D53/86B01D53/56
CPCB01D53/8628B01D2258/0283B01J23/002B01J23/22B01J35/1019B01J37/031B01J2523/00B01J2523/22B01J2523/31B01J2523/3712B01J2523/41B01J2523/55
Inventor 史荣会张杨袁彬涵马淼杨毅林俊康
Owner FUJIAN UNIV OF TECH
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