Catalytic ozonation catalyst as well as preparation method and application thereof

A technology of ozone catalytic oxidation and catalyst, which is applied in the field of water treatment, can solve the problems of affecting the growth and reproduction of microorganisms, the inhibition of microorganisms' toxicity, and the high concentration of organic matter, so as to facilitate large-scale industrial production, improve COD removal rate, and the raw materials are simple and easy to obtain Effect

Pending Publication Date: 2022-04-08
CCTEG CHINA COAL RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Coking wastewater contains more toxic substances such as cyanide, aromatic and heterocyclic compounds, which are toxic and inhibitory to microorganisms, and will reduce the treatment effect of microbial coking wastewater
(3) High concentration of organic matter in coking wastewater
Its COD is very large, which can exceed 10000mg / L, and its biodegradability is poor, which belongs to the difficult biochemical wastewater; (4) NH in coking wastewater 3 -N, TN are high, C / N value is very low, excess nitrogen source, insufficient carbon source, affect the growth and reproduction of microorganisms, if no denitrification treatment is added, it is difficult to meet the emission standard

Method used

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  • Catalytic ozonation catalyst as well as preparation method and application thereof
  • Catalytic ozonation catalyst as well as preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0026] The embodiment of the present invention also provides a preparation method of an ozone catalytic oxidation catalyst, comprising the following steps:

[0027] a. Mix the salt solution of the active components Fe, Cu and Ni and the salt solution of the auxiliary agent Co to obtain the impregnation solution;

[0028] b. adding a carrier into a granulator, spraying the impregnation solution on the carrier, and granulating to obtain pellets;

[0029] c. Drying and calcining the pellets to prepare a spherical catalyst.

[0030] The preparation method of the ozone catalytic oxidation catalyst in the embodiment of the present invention adopts the pelletizing method to prepare the catalyst, and the powder particles are agglomerated under the action of liquid bridge and capillary force to form micronuclei, and the friction and rolling impact generated by the rotation of the container Under the condition, it continuously rotates and grows in the powder layer, and finally becomes ...

Embodiment 1

[0036] Mix ferric nitrate, copper nitrate, nickel nitrate, and cobalt nitrate with water to form an impregnating solution, and add carrier γ-Al in a small amount and several times in the granulator 2 o 3 , while spraying the impregnating solution on the carrier, so that the carrier and the components of the impregnating solution are fully mixed, slowly grow into balls, sieve out 3-5mm small balls, after 24 hours of development, dry and roast at 500°C for 4 hours to obtain a spherical catalyst.

[0037] In the spherical catalyst prepared in this example, the total loading of active components Fe, Cu and Ni oxides was 5%, and the mass ratio of Fe, Cu, Ni and Co oxides was 1:2:2:0.5.

[0038]Catalyst stability test: Soak the catalyst in a simulated water sample composed of quinoline, nitrobenzene, hydroquinone, isopentyl glycol, n-heptane, etc., with a COD value of about 240mg / L, and set After shaking on a shaking table, the concentration of metal ions in the water was measured,...

Embodiment 2

[0044] The method is the same as that of Example 1, except that in the prepared spherical catalyst, the total loading of active components Fe, Cu and Ni oxides is 6%.

[0045] The catalytic performance test of the catalyst prepared in this embodiment is shown in Table 6.

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Abstract

The invention discloses an ozone catalytic oxidation catalyst, which comprises a carrier, an active component and an auxiliary agent, the carrier comprises gamma-Al2O3, the active component is an oxide of Fe, Cu and Ni, and the auxiliary agent is a Co oxide. In the active component, the mass ratio of Fe oxide to Cu oxide to Ni oxide is 1: (1.5-6): (1.5-6); the mass of the auxiliary Co oxide is 30-80% of the mass of the active component Fe oxide; the loading capacity of the active component metal oxide is 5-10% based on the total mass of the catalyst. The ozone catalytic oxidation catalyst provided by the invention has the advantages of easily available raw materials, low cost and simple preparation method, and can effectively treat high-concentration coking wastewater, and the COD removal rate can reach 80%.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and specifically relates to an ozone catalytic oxidation catalyst, in particular to a preparation method of the ozone catalytic oxidation catalyst, and further to an application of the ozone catalytic oxidation catalyst. Background technique [0002] Coking wastewater is high-concentration refractory organic wastewater mainly composed of phenols and nitrogen heterocyclic substances. The main sources include direct steam condensation and separation water and washing water in the tar refining process; direct cooling water for gas final cooling, direct steam condensation and separation water for crude benzene processing, direct steam condensation water for refined benzene processing engineering; workshop floor or equipment Washing water and residual ammonia formed from water contained in coal, etc. [0003] Coking wastewater is one of the refractory industrial wastewater. It is difficult to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755C02F1/78B01J35/02B01J35/08
Inventor 钟金龙刘敏毛学锋陈贵锋李军芳曲思建王琦王亚强黄澎胡发亭寇丽红傅聪
Owner CCTEG CHINA COAL RES INST
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