Micropore pottery-based catalyst for oxidation of ozone and preparation method thereof

A technology of ozone oxidation and catalyst, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, oxidized water/sewage treatment, etc., can solve the problem of low oxidation efficiency, achieve easy oxidation and decomposition, improve removal rate and use of ozone Efficiency, enhanced oxidation effect

Inactive Publication Date: 2009-05-20
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, simple ozone oxidation has a low oxidation efficiency for some high-stable pollutants. To improve the removal efficiency of organic pollutants, catalysts must be used for catalytic oxidation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: Mix 60 parts of diatomite, 5 parts of hematite, 5 parts of manganese ore, 10 parts of wood powder and 10 parts of clay according to the mass ratio, grind and sieve, add 10 parts of water and stir well, After compacting in the mold, it was dried at room temperature for 48 hours. Place the catalyst green body in the pottery bowl, cover and close it, and place it in a suitable position in the kiln. First heat the kiln to 600°C for 4 hours, then raise the temperature of the kiln to 1050°C for 4 hours, then turn on the kiln to cool naturally to obtain the required catalyst. According to this embodiment, the catalyst specific surface area is 3.2m 2 / g, the average pore diameter is 25 μm.

Embodiment 2

[0026] Example 2: According to the mass ratio, 50 parts of diatomite, 4 parts of bauxite, 3 parts of hematite ore, 3 parts of manganese ore, 12 parts of coal powder and 13 parts of clay were mixed, ground and sieved, Add 15 parts of water and stir evenly, and then dry at room temperature for 48 hours after compacting in a mould. Place the catalyst green body in the pottery bowl, cover and close it, and place it in a suitable position in the kiln. First heat the kiln to 500°C for 4 hours, then raise the temperature of the kiln to 1000°C for 4 hours, then turn on the kiln to cool naturally to obtain the required catalyst. The specific surface area and average pore diameter of the catalyst prepared by this embodiment are close to those of the previous example.

Embodiment 3

[0027] Example 3: 40 parts of diatomite, 15 parts of bauxite, 8 parts of hematite, 5 parts of manganese ore, 15 parts of wood powder and 7 parts of clay were mixed according to the mass ratio, ground and sieved, Add 10 parts of water and stir evenly, and then dry at room temperature for 48 hours after compacting in a mould. Place the catalyst green body in the pottery bowl, cover and close it, and place it in a suitable position in the kiln. First heat the kiln to 400°C for 4 hours, then raise the temperature of the kiln to 900°C for 4 hours, then turn on the kiln to cool naturally to obtain the required catalyst. According to this embodiment, the catalyst specific surface area is 2.8m 2 / g, and the average pore diameter is 30 μm.

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PUM

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Abstract

The invention relates to a novel microporous ceramic-based catalyst applied to the catalytic oxidation of ozone, which is characterized in that the catalyst comprises the following raw materials by weight proportion: 30 to 70 percent of diatomite, 10 to 30 percent of active constituent, 5 to 15 percent of pore former, and 5 to 15 percent of clay, and the firing temperature is between 400 and 1,050 DEG C after a green body is produced. The microporous ceramic-based catalyst is applied to removing trace organic pollutants in pure water. After the ozone with certain concentration is dissolved into water, the passing of the catalyst can catalyze the oxidization of the ozone to organic substances, ensure that the oxidation rate and the oxidation efficiency are greatly improved, and efficiently strengthen the removal of the trace organic pollutants in the water.

Description

technical field [0001] The invention belongs to the technical field of drinking water treatment, and in particular relates to a microporous pottery-based catalyst for ozone oxidation and a preparation method thereof. Background technique [0002] With the continuous improvement of drinking water quality indicators and the deteriorating quality of water sources, it is becoming more and more difficult for traditional water supply treatment processes to achieve water quality goals, and advanced drinking water treatment technologies have been extensively studied. Using ozone as an oxidant to oxidize and decompose trace organic refractory organic matter in water has become an important method and approach. [0003] Ozone has strong oxidizing properties, and its oxidizing ability is higher than that of chlorine and potassium permanganate. It can oxidize many organic substances, and the excess ozone in water can be decomposed into oxygen in a short time, avoiding secondary pollutio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/16C02F1/78
Inventor 隋铭皓盛力
Owner TONGJI UNIV
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