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Preparation method and applications of supported active carbon ozone catalyst

An activated carbon and supported technology, which is applied in the preparation of supported activated carbon ozone catalysts, can solve the problems of immature high-efficiency catalyst catalysts and ozone oxidation reactor technology, unclear reaction mechanism of catalytic ozone oxidation technology, and difficulty in guiding catalyst selection and ozonation. Design and other issues to achieve the effect of low cost, accelerated ozone decomposition, and high load

Active Publication Date: 2018-10-23
YANGTZE DELTA REGION INST OF TSINGHUA UNIV ZHEJIANG
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Problems solved by technology

[0010] Since the reaction mechanism of catalytic ozonation technology is still unclear, it is currently in the speculative stage, so it is still difficult for those skilled in the art to guide the selection and design of catalysts; and the preparation of high-efficiency catalysts and the structure of catalysts and ozonation reactors There is also the problem of immature technology, which limits the application of catalytic ozonation technology in practical engineering, making catalytic ozonation technology rarely reported in practical projects.

Method used

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Embodiment 1

[0030] A kind of supported activated carbon ozone catalyst, its specific preparation method is as follows:

[0031] (1) The particle size is 4.5mm and the specific surface area is 1200m 2 / g of coal-based granular activated carbon, soaked and washed in pure water for 3.0h, drained, and dried; the granular activated carbon was placed in KMnO with a mass fraction of Mn of 1.5% 4 Mix and stir in the aqueous solution and soak for 8 hours, drain and dry; then place Ce(NO 3 ) 3 .6H 2 Soak in O aqueous solution for 12 hours, drain and dry; then, burn for 6 hours in an anaerobic reactor at 185°C to obtain activated carbon composite particles;

[0032] (2) Put the activated carbon composite particles prepared in step (1) into an ultrasonic cleaner equipped with a mass fraction of 0.75% dilute hydrochloric acid aqueous solution for cleaning and activation. The activation time is 1.0h, and the cleaning solution is filtered to obtain a loaded type activated carbon ozone catalyst.

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Abstract

The invention discloses a preparation method of a supported active carbon ozone catalyst. The preparation method comprises following steps: (1) soaking active carbon particles in a KMnO4 water solution, drying, then soaking active carbon particles in a Ce(NO3)3.6H2O water solution, drying, and then burning the active carbon particles in the absence of oxygen to obtain composite active carbon particles; and (2) under the irradiation of ultrasonic waves, washing and activating the composite active carbon particles to obtain the supported active carbon ozone catalyst. According to the preparationmethod, active carbon particles are soaked in a KMnO4 water solution and a Ce(NO3)3.6H2O water solution, dried, burned, and finally washed and activated by ultrasonic waves to obtain the supported active carbon ozone catalyst, which can accelerate decomposition of ozone, and the efficiency of catalytic degradation of organic pollutant is obviously improved under the catalytic effect of ozone.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a preparation method and application of a supported activated carbon ozone catalyst. Background technique [0002] At home and abroad, the ozone oxidation system has been widely used in the field of wastewater treatment, such as: landfill leachate and textile, pharmaceutical and chemical industrial wastewater treatment; it is mainly used to remove refractory organic pollutants, such as: landfill leachate Humic substances and adsorbable organic halides, colored aromatic compounds in textile wastewater, toxic or biocidal substances from the pharmaceutical and chemical industries. [0003] Ozone is a strong oxidizing agent with strong oxidation and reduction potential of 2.07V, second only to fluorine (2.87V) in nature, and is widely used in wastewater treatment. It is currently recognized that ozone reacts with organic matter in water through two pathways: [0004] One w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J37/02B01J37/06B01J37/08B01J37/34C02F1/72C02F1/78
CPCB01J23/34B01J37/024B01J37/06B01J37/08B01J37/343C02F1/725C02F1/78
Inventor 万梅范举红刘锐陈吕军
Owner YANGTZE DELTA REGION INST OF TSINGHUA UNIV ZHEJIANG
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