Ozone catalyst and preparation method

A catalyst, ozone technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. Dissolution, short service life and other problems, to achieve the effects of high stability, improved decomposition ability, and long service life

Inactive Publication Date: 2015-05-27
北京天灏柯润环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems in the prior art that the service life of the heterogeneous ozonation catalyst is short, the active components are easy to dissolve, and cause secondary pollution, the invention provides an ozone catalyst and a preparation method
The cata

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Activated carbon modification: Take 80g of 20-60 mesh coconut shell activated carbon (commercially available), wash it with 5% NaOH solution, and then impregnate it with 5% dilute nitric acid for 1h, keeping the temperature at 50°C; wash it with distilled water, and then Dry at 105°C for 24 hours to prepare modified activated carbon with a specific surface area of ​​1500㎡ / g.

[0041] (2) Preparation of impregnation solution: Accurately weigh Fe (NO 3 ) 3 9H 2 O solid (analytical grade, commercially available) 50.5g, Mn(NO 3 ) 2 4H 2 O solid (analytical pure, commercially available) 28.85g was placed in a beaker, an appropriate amount of water was added, heated to 50°C under stirring, and left to cool after the solid was completely dissolved. Transfer the cooled liquid to a 500ml volumetric flask, shake to volume with distilled water, and let stand for later use.

[0042] (3) Catalyst preparation: Fe(NO 3 ) 3 , Mn (NO 3 ) 2 Put 500ml of the solution in a be...

Embodiment 2

[0047] (1) Activated carbon modification: Take 70g of 20-60 mesh coconut shell activated carbon (commercially available), wash it with 10% NaOH solution, and then impregnate it with 10% dilute nitric acid for 2 hours, keeping the temperature at 50°C; Dry at 105°C for 24 hours to prepare modified activated carbon with a specific surface area of ​​2000㎡ / g.

[0048] (2) Preparation of impregnation solution: Accurately weigh Fe (NO 3 ) 3 9H 2 O solid (analytical grade, commercially available) 101g, Mn(NO 3 ) 2 4H 2 O solid (analytical pure, commercially available) 28.85g was placed in a beaker, an appropriate amount of water was added, heated to 50°C under stirring, and left to cool after the solid was completely dissolved. Transfer the cooled liquid to a 500ml volumetric flask, shake to volume with distilled water, and let stand for later use.

[0049] (3) Catalyst preparation: Fe(NO 3 ) 3 , Mn (NO 3 ) 2 Put 500ml of the solution in a beaker, stir evenly, then add 70g o...

Embodiment 3

[0054] (1) Activated carbon modification: Take 70g of 20-60 mesh coconut shell activated carbon (commercially available), wash it with 10% NaOH solution, and then impregnate it with 10% dilute nitric acid for 1.5h, keeping the temperature at 50°C; wash it with distilled water, Dry at 105°C for 24 hours to obtain modified activated carbon with a specific surface area of ​​1700㎡ / g.

[0055] (2) Preparation of impregnation solution: Accurately weigh Fe (NO 3 ) 3 9H 2 O solid (analytical grade, commercially available) 50.5g, Mn(NO 3 ) 2 4H 2 O solid (analytical pure, commercially available) 57.7g was placed in a beaker, an appropriate amount of water was added, heated to 50°C under stirring, and left to cool after the solid was completely dissolved. Transfer the cooled liquid to a 500ml volumetric flask, shake to volume with distilled water, and let stand for later use.

[0056] (3) Catalyst preparation: Fe(NO 3 ) 3 , Mn (NO 3 ) 2 Put 500ml of the solution in a beaker, s...

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Abstract

The invention discloses an ozone catalyst and a preparation method. The catalyst comprises the following components by weight: 70 to 80% of a modified active carbon carrier and active components, namely, 10 to 20% of Fe2O3 and 10 to 20% of MnO2. The modified active carbon carrier is prepared by cleaning active carbon with a sodium hydroxide solution, then dipping the cleaned active carbon with dilute nitric acid, cleaning the dipped active carbon with deionized water and carrying out drying. The preparation method comprises the following steps: loading the active components on the modified active carbon carrier according to the above-mentioned amounts; and carrying out drying and roasting so as to prepare the ozone catalyst. The catalyst provided by the invention has good stability, overcomes the problems of dissolution and loss of metal oxide active components and exerts good effect on COD removal, decolorization, deodorization, degradation of toxic pollutants and improvement of biodegradability of wastewater.

Description

technical field [0001] The invention relates to the technical field of ozone catalytic oxidation, and more particularly relates to an ozone catalyst and a preparation method. Background technique [0002] Ozone catalytic oxidation technology is a new type of method developed in recent years to oxidize those organic substances that are difficult to be oxidized or degraded by ozone alone under normal temperature and pressure. Like other advanced oxidation technologies, ozone catalytic oxidation technology uses ozone to Under the action of the catalyst, a large number of strong oxidizing hydroxyl radicals are generated to oxidize and decompose organic matter, so as to achieve the purpose of water purification. [0003] Ozone catalytic oxidation technology can be divided into two categories according to the catalysts used: one is a homogeneous catalyst using metal ions as a catalyst; the other is a heterogeneous catalyst using solid metal or metal oxide supported on a carrier. ...

Claims

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Application Information

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IPC IPC(8): B01J23/889C02F1/78C02F1/72
Inventor 关宏讯李惠董巧玲
Owner 北京天灏柯润环境科技有限公司
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