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Granular electrode catalyst stuffing for 3D electrode reactor and its preparing method

A particle electrode and three-dimensional electrode technology, which is applied in the field of particle electrode catalyst filler and its preparation, can solve the problems of reducing the adsorption and oxidative decomposition of refractory organic matter, reducing the specific surface area of ​​particle electrodes, and the number of hydroxyl radicals. Effects of reaction rate, relaxation of oxidation ability, and increase in anode area

Inactive Publication Date: 2008-10-29
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

At present, the particle electrode catalyst filler used in this technology is mainly untreated activated carbon, which has the disadvantages of low adsorption capacity, poor selective adsorption, and a small number of hydroxyl radicals generated. Chinese patent CN 1669942 uses activated carbon and transition metal oxides The bonded and sintered material used as a particle electrode catalyst increases the number of hydroxyl radicals generated, but after the activated carbon and metal oxide are bonded, the specific surface area of ​​the particle electrode is greatly reduced, and the adsorption and absorption of refractory organic matter by the particle electrode are reduced. Oxidative decomposition ability

Method used

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  • Granular electrode catalyst stuffing for 3D electrode reactor and its preparing method
  • Granular electrode catalyst stuffing for 3D electrode reactor and its preparing method

Examples

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Effect test

Embodiment 1

[0025] The raw activated carbon is soaked in 8% hydrochloric acid solution at normal temperature for 6 hours and then washed to neutral, dried at 150°C for 1 hour, then soaked in 8% sodium hydroxide solution for 6 hours at normal temperature and washed to neutral. Neutral, dry at 150°C for 1 hour to make acid-base modified activated carbon; add the acid-base modified activated carbon to a hydrogen peroxide solution with a mass concentration of 12%, heat to 50°C and stir for 1.5 hours, filter after cooling, and use Wash with deionized water until neutral; add the oxidatively modified activated carbon to a mixed solution containing 0.2mol / L copper nitrate salt and 0.3mol / L iron nitrate, stir and impregnate at room temperature for 6h, then dry at 115°C After 1h, at N 2 Modified activated carbon was obtained after roasting at 420°C for 3 hours; acid-base modified activated carbon was added to 0.15% cellulose acetate solution, soaked for 0.5h, and dried to make coated activated car...

Embodiment 2

[0027] The raw activated carbon is soaked in a hydrochloric acid solution with a mass concentration of 10% at room temperature for 9 hours and then washed to neutrality, dried at 180°C for 2 hours, and then soaked in a sodium hydroxide solution with a mass concentration of 10% at room temperature for 9 hours and then washed to Neutral, dry at 180°C for 2 hours to make acid-base modified activated carbon; add the acid-base modified activated carbon into a hydrogen peroxide solution with a mass concentration of 13%, heat to 60°C and stir for 1.5h, filter after cooling, and use Wash with deionized water until neutral; add the oxidatively modified activated carbon to a mixed solution containing 0.4 mol / L copper nitrate salt and 0.5 mol / L iron nitrate, stir and impregnate at room temperature for 8 hours, then dry at 120°C After 2h, at N 2 The modified activated carbon was obtained after roasting at 400°C for 4 hours; the acid-base modified activated carbon was added to 0.2% cellulo...

Embodiment 3

[0029] The raw activated carbon is soaked in hydrochloric acid solution with a mass concentration of 9% at room temperature for 8 hours, washed to neutrality, dried at 180° C. for 2 hours, and then soaked with potassium hydroxide with a mass concentration of 9% (give an example of potassium hydroxide) ) solution at room temperature for 8 hours, washed to neutrality, and dried at 180°C for 2 hours to make acid-base modified activated carbon; add the acid-base modified activated carbon into a hydrogen peroxide solution with a mass concentration of 15%, and heat to 60°C Stir for 1.5h, filter after cooling, wash with deionized water until neutral; add the activated carbon that has been oxidized and modified into a mixed solution containing 0.5mol / L copper chloride salt and 0.4mol / L ferric chloride, at room temperature After impregnating under stirring for 8 hours, drying at 120°C for 2 hours, and roasting in He atmosphere at 390°C for 4 hours to obtain modified activated carbon; ad...

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Abstract

The present invention is granular electrode catalyst stuffing for 3D electrode reactor and its preparation process. The electrode catalyst stuffing consists of modified active carbon 60-70 wt% and film coating active carbon 40-30 wt%. The modified active carbon is prepared with active carbon through acid or alkali modification, oxidizing modification and metal supporting modification; and the film coating active carbon is prepared with active carbon through acid or alkali modification and soaking in cellulose acetate solution. The 3D granular electrode stuffing is used in waste water treatment, and has the advantages of great adsorption capacity, fast reaction speed, stable treating effect, etc.

Description

technical field [0001] The invention relates to a rapid degradation technology of refractory organic matter in waste water, belongs to the field of water treatment and water pollution prevention and control, and particularly relates to a particle electrode catalyst filler for a three-dimensional electrode reactor for degrading refractory organic matter in water and a preparation method thereof. Background technique [0002] With the continuous development of the modern chemical industry, the quantity and types of refractory organic matter entering the water body through various channels have increased sharply, causing serious pollution to the water environment and directly threatening human health. Such pollutants are easy to accumulate in organisms, and they are also likely to become potential pollution sources of water bodies, thereby causing harmful effects such as poisoning and "three-caused" effects on organisms or humans. In water treatment projects, wastewater contain...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/46B01J20/20
Inventor 徐炎华赵浩陈雷杨晓燕
Owner NANJING TECH UNIV
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