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Preparation method, product and application of efficient integral type ammonia nitrogen purification ozone catalyst

A catalyst, integrated technology, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc. Deal with problems such as cost and increase operating cost, and achieve the effect of excellent activity, enrichment of valence state, and reduction of dosage

Pending Publication Date: 2021-03-30
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still a low catalytic efficiency, which directly leads to a large amount of catalyst relative to the concentration of ammonia nitrogen pollutants, which increases the cost of ozone catalytic oxidation treatment
Secondly, the ozone utilization rate of the current catalyst is low, and a large amount of ozone needs to be introduced, which greatly increases the operating cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A high-efficiency monolithic ammonia nitrogen purification ozone catalyst, with activated alumina pellets as the monolithic carrier, cobalt as the active component, adopts equal-volume ultrasonic impregnation and high-temperature reduction to restructure the active center and its interface, as follows Steps to prepare:

[0026] (1) Carrier activation, impregnating activated alumina pellets with equal volume of 0.1mol / L hydrochloric acid solution for 24 hours, washing with deionized water until neutral, and drying at 110°C to obtain activated activated alumina pellets for use;

[0027] (2) Loading of active components, activated activated alumina pellets are used as the monolithic carrier, cobalt nitrate solution is used as the cobalt source, 6.34g of cobalt nitrate hexahydrate is dissolved in 10g of deionized water, and fully mixed to obtain a cobalt nitrate solution; Mix 25g of the treated activated alumina pellets with cobalt nitrate solution, use the equal volume ult...

Embodiment 2

[0030] A high-efficiency monolithic ammonia nitrogen purification ozone catalyst, step (1) carrier activation method is the same as that of Example 1, prepared according to the following steps:

[0031] (1) Carrier activation, impregnating activated alumina pellets with equal volume of 0.1mol / L hydrochloric acid solution for 24 hours, washing with deionized water until neutral, and drying at 110°C to obtain activated activated alumina pellets for use;

[0032] (2) Active component loading, using activated alumina pellets as a monolithic carrier, cobalt nitrate solution as a cobalt source, dissolving 3.62g of cobalt nitrate hexahydrate in 11g of deionized water, and fully mixing to obtain a cobalt nitrate solution; Mix 25g of treated activated alumina pellets with cobalt nitrate solution, use the equal volume ultrasonic impregnation method to load the active component cobalt, ultrasonic impregnation for 30min, react at 40°C for 24h under open conditions, and dry at 110°C to obta...

Embodiment 3

[0035] A high-efficiency monolithic ammonia nitrogen purification ozone catalyst, step (1) carrier activation method is the same as that of Example 1, prepared according to the following steps:

[0036] (1) Activate the carrier, impregnate the active alumina pellets with equal volume of 0.1mol / L hydrochloric acid solution for 24 hours, wash with deionized water until neutral, dry at 110°C, and set aside.

[0037] (2), active component loading, using activated alumina pellets as a monolithic carrier, cobalt nitrate solution as a cobalt source, dissolving 9.05g of cobalt nitrate hexahydrate in 9g of deionized water, and fully mixing to obtain a cobalt nitrate solution ; Mix 25g of treated activated alumina pellets with cobalt nitrate solution, impregnate them ultrasonically for 60min, react at 40°C for 24h under open conditions, and dry at 70°C to obtain a catalyst precursor;

[0038] (3), active center and its interface reconstruction, the above catalyst precursor was heated up t...

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PUM

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Abstract

The invention discloses a preparation method, a product and an application of a high-efficiency integral type ammonia nitrogen purification ozone catalyst. Activated alumina spheres are used as an integral type carrier, and cobalt is used as an active component. Isopyknic ultrasonic impregnation and high-temperature reduction are cooperated to reconstruct an active center and an interface of the active center, so that ammonia nitrogen is selectively catalyzed and oxidized at room temperature to generate nitrogen under the condition of low-concentration ozone. The obtained efficient integral type ammonia nitrogen purification ozone catalyst is excellent in activity, the preparation method is simple and environmentally friendly, large-scale production is easy, and good application prospectsare achieved.

Description

technical field [0001] The invention relates to a method for catalytic purification of ammonia nitrogen, in particular to a preparation method of an efficient monolithic ammonia nitrogen purification ozone catalyst and its product and application. Background technique [0002] Ammonia is one of the malodorous gases, and its main sources are nitrogen fertilizer, coking, manure treatment, meat processing, livestock breeding, spoiled food, etc. When the ammonia concentration reaches 15ppm, people can detect its presence. Long-term exposure to ammonia-polluted air can cause respiratory diseases such as chronic bronchitis and asthma. Ammonia is easily soluble in water. Considering that ammonia nitrogen is also widely present in drinking water sources in my country, if the efficient purification of ammonia nitrogen in water is realized, it will not only solve the problem of excessive ammonia nitrogen in water sources, but also provide ideas for purification of ammonia odor. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75B01J37/34B01J37/02B01J37/18C02F1/72C02F1/78C02F101/16
CPCB01J23/75B01J37/343B01J37/0201B01J37/18C02F1/725C02F1/78C02F2101/16C02F2303/02C02F2209/14B01J35/394
Inventor 崔大祥赵昆峰童琴袁静蔡婷
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH