Spherical activated carbon ozone catalyst with high alkalinity on surface and application of spherical activated carbon ozone catalyst

A technology of surfactants and catalysts, applied in physical/chemical process catalysts, oxidized water/sewage treatment, chemical instruments and methods, etc., can solve the problems of high preparation cost, long time-consuming, complicated preparation process, etc., and achieve simple preparation method , good stability and flexible process

Active Publication Date: 2020-02-04
EAST CHINA UNIV OF SCI & TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] This invention mainly aims at the problems of high preparation cost, complicated preparation process and long time consumption of the existing ozone catalytic oxidation catalyst, and provides a preparation method of surface highly alkaline mesoporous spherical activated carbon

Method used

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  • Spherical activated carbon ozone catalyst with high alkalinity on surface and application of spherical activated carbon ozone catalyst
  • Spherical activated carbon ozone catalyst with high alkalinity on surface and application of spherical activated carbon ozone catalyst
  • Spherical activated carbon ozone catalyst with high alkalinity on surface and application of spherical activated carbon ozone catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Add 1g of anhydrous aluminum chloride and 1g of sulfur to 100g of petroleum pitch with a softening point of 40°C and 0% toluene insoluble matter. Stir at 250°C for 3 hours under a nitrogen atmosphere. The intermediate pitch is obtained after cooling down. Then pour the intermediate bitumen into a reaction kettle, add 1000ml of water and 2g of sodium alginate, stir at 150°C to suspend into balls. Subsequently, the ball was rapidly heat-treated at 400° C. for 30 min in an air atmosphere to obtain non-melting balls. Then in the activation furnace, under the steam atmosphere, at 10 ~ 20 ℃ min -1 The heating rate was increased to 1000 °C and maintained for 1 h. Finally, the mesoporous spherical activated carbon catalyst SC was obtained.

Embodiment 2

[0042] Get the mesoporous spherical activated carbon catalyst 3g among the embodiment 1, add the NaOH solution of 40ml 5mol / L. Stir at a constant temperature of 70°C for 4 hours, adjust the temperature to 35°C and stir for 24 hours. The activated carbon was fished out and washed with distilled water until the pH remained constant. Dry in a vacuum oven for 12 hours to obtain a surface highly basic spherical activated carbon catalyst SC-1.

Embodiment 3

[0044] Get the mesoporous spherical activated carbon catalyst 3g among the embodiment 1, add the NaOH solution of 40ml 10mol / L. Stir at a constant temperature of 70°C for 4 hours, adjust the temperature to 35°C and stir for 24 hours. The activated carbon was fished out and washed with distilled water until the pH remained constant. Dry in a vacuum oven for 12 hours to obtain a surface highly basic spherical activated carbon catalyst SC-2.

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Abstract

The invention provides a spherical activated carbon ozone catalyst with high alkalinity on the surface. The spherical activated carbon ozone catalyst is prepared by the following steps: mixing asphaltof a low softening point and an oxidation accelerator with a Lewis catalyst, adding a surfactant and a water suspension, performing sphere formation, performing carbonization and activation so as toobtain a mesoporous spherical activated carbon catalyst, further adding an alkali liquid, performing sufficient mixing and modification, uniformly mixing the components through gradient temperature change, performing washing till the pH value is stable, performing vacuum drying, so as to obtain mesoporous spherical activated carbon with high alkalinity on the surface. The material is high in catalytic activity, is capable of significantly improving the efficiency of converting ozone into hydroxyl radicals and promoting mineralization of refractory pollutants, is good in stability and can maintain high catalytic activity in long-term use. The catalyst can be applied to treatment on organic pollutants, and is beneficial to adsorption and intragranular diffusion and mass transfer of pollutants, and the degradation efficiency can be improved.

Description

technical field [0001] The invention relates to a surface highly alkaline spherical activated carbon ozone catalyst and its application. It belongs to the fields of environmental engineering and water treatment. Background technique [0002] Degraded organic wastewater refers to wastewater that decomposes slowly or cannot be decomposed by microorganisms, and if it can be decomposed by microorganisms, it cannot be completely decomposed. The common characteristics of these substances are high toxicity, complex ingredients, and high chemical oxygen consumption. Generally, microorganisms have almost no degradation effect on this wastewater. If these substances are discharged wantonly without treatment, they will seriously pollute the environment and threaten the environment. Human health. Refractory pollutants are easy to accumulate in organisms and become potential sources of pollution in water bodies. At present, the types and discharge of industrial wastewater are increasi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B01J35/10C02F1/78C02F101/36
CPCB01J21/18B01J35/1004B01J35/1014B01J35/1038C02F1/78C02F2101/36
Inventor 杨雪晶程晨龙东辉袁远平卫皇曌张洪章李剑平李昊东孙承林汪华林
Owner EAST CHINA UNIV OF SCI & TECH
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