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Ozone catalytic oxidation composite catalyst as well as preparation method and application thereof

An ozone catalytic oxidation and composite catalyst technology, which is applied in the field of water treatment, can solve problems such as difficulty in reaching water effluent standards, and achieve the effects of improving COD removal rate, easy availability of raw materials and simple preparation method.

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

AI Technical Summary

Problems solved by technology

However, coking wastewater is one of the refractory industrial wastewater, and it is difficult to meet the effluent standard by conventional biological methods

Method used

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  • Ozone catalytic oxidation composite catalyst as well as preparation method and application thereof
  • Ozone catalytic oxidation composite 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 composite 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 Ce 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 composite catalyst in the embodiment of the present invention adopts the pelletizing method to prepare the catalyst, and the powder particles are agglomerated together under the action of the liquid bridge and capillary force to form micronuclei, and the friction force and rolling impact generated by the rotation of the container Under the action, it will continue to rotate and grow in ...

Embodiment 1

[0036] Mix ferric nitrate, copper nitrate, nickel nitrate, and cerium nitrate with water to form an impregnation 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 Ce 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 composite 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 Ce 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 agent Ce oxide is 25-85% 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 83%.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and specifically relates to an ozone catalytic oxidation composite catalyst, in particular, to a preparation method of the ozone catalytic oxidation composite catalyst, and further, to an application of the ozone catalytic oxidation composite catalyst. Background technique [0002] At present, ozone catalysts mainly include minerals, metal (hydr) oxides, metal oxide-supported catalysts and modified solid waste catalysts, etc., and their appearance forms mainly include spherical, granular, powdery, honeycomb and amorphous, etc. . Among them, spherical supported catalysts have attracted much attention due to their advantages of high catalytic efficiency, high strength, easy preparation and stable effect, and can be applied to industrial wastewater treatment. [0003] Coking wastewater is wastewater produced during high-temperature pyrolysis and dry distillation of raw coal, gas purificatio...

Claims

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Application Information

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IPC IPC(8): B01J23/83B01J35/02B01J35/08C02F1/72C02F1/78C02F101/30C02F101/32C02F101/34C02F101/38
Inventor 钟金龙陈贵锋曲思建毛学锋刘敏王冠宇王亚强王吉坤李文博李兰廷寇丽红文芳
Owner CCTEG CHINA COAL RES INST
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