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Novel supported catalyst, preparation method therefor and use of novel supported catalyst

A supported catalyst, ozone catalytic oxidation technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of low production efficiency and non-repeatability of ozone generators Utilization, short service life and other problems, to achieve the effect of being conducive to industrial application, good effect of advanced treatment, and reducing production cost

Inactive Publication Date: 2016-07-27
SHANGHAI EMPEROR OF CLEANING HI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the low utilization rate of ozone existing in the existing method for advanced treatment of wastewater by catalytic oxidation of ozone; the production efficiency of the ozone generating device is low and the energy consumption is large; the catalytic effect of the catalyst is not ideal and the service life is short , can not be reused; the scope of application is limited and other technical problems, and provides a new type of supported catalyst, its preparation method and use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] With 2-4mm alumina as the carrier, after activation treatment, Cd(NO 3 ) 2 As the precursor of Cd, after configuring it into an aqueous solution with a mass fraction of 3%, the Cd(NO 3 ) 2 Loaded on the carrier, calcined, and after activation and reduction, the supported catalyst AODO with a mass fraction of 2% is obtained; the percentage refers to the percentage of the active component in the total mass of the supported catalyst; wherein, the activated carrier The time is 2 minutes; the temperature for the activation of the carrier is 400°C; the time for the calcination is 1 hour; the temperature for the calcination is 500°C. The specific surface area of ​​the finally prepared supported catalyst AODO is 230m 2 / g, the pore volume is 0.36mL / g, and the pore diameter is 6.80nm (measured by X-ray fluorescence spectrometer).

Embodiment 2

[0027] Use 2-4mm alumina as the carrier, after activation treatment, use ZnCl 2 As the precursor of Zn, after configuring it into an aqueous solution with a mass fraction of 2%, the ZnCl 2 Loaded on the carrier, calcined, after activation and reduction, the supported catalyst AODO with a mass fraction of 4% is obtained; the percentage refers to the percentage of the active component in the total mass of the supported catalyst; wherein, the activated carrier The time is 15 minutes; the temperature for the activation of the carrier is 500°C; the time for the calcination is 2 hours; the temperature for the calcination is 540°C. The specific surface area of ​​the finally prepared supported catalyst AODO is 240m 2 / g, the pore volume is 0.38mL / g, and the pore diameter is 7.10nm (measured by X-ray fluorescence spectrometer).

Embodiment 3

[0029] With 2-4mm alumina as the carrier, after activation treatment, Ni(NO 3 ) 2 ·6H 2 O is used as the precursor of Ni. After configuring it into an aqueous solution with a mass fraction of 2%, the Ni(NO 3 ) 2 Loaded on the carrier, calcined, after activation and reduction, the supported catalyst AODO with a mass fraction of 4% is obtained; the percentage refers to the percentage of the active component in the total mass of the supported catalyst; wherein, the activated carrier The time is 10 minutes; the temperature for the activation of the carrier is 450°C; the time for the calcination is 2 hours; the temperature for the calcination is 550°C. The specific surface area of ​​the finally prepared supported catalyst AODO is 246m 2 / g, the pore volume is 0.42mL / g, and the pore diameter is 6.92nm (measured by X-ray fluorescence spectrometer).

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Abstract

The invention discloses a novel supported catalyst, a preparation method therefor and use of the novel supported catalyst. The preparation method for the supported catalyst, disclosed by the invention, comprises the following steps of carrying out activating treatment on 2mm-4mm alumina which serves as a support, then, loading a precursor of active ingredients to the support by adopting an incipient-wetness impregnation method, and carrying out roasting, thereby obtaining the supported catalyst AODO with the mass fraction of 1% to 8%. When the supported catalyst disclosed by the invention is applied to the deep treatment of wastewater through catalytic oxidation of ozone, the utilization ratio of the ozone can be increased, the deep treatment effect on the wastewater is very good, and the COD of effluent can be lowered to be lower than 50mg / L; the ozone-catalytic-oxidation wastewater deep-treatment method is free of influence and limitations caused by conditions such as pH and temperature of the wastewater, so that the operation is convenient and flexible, and the range of application is wide; and meanwhile, the supported catalyst disclosed by the invention can be regenerated and is low in production cost, thereby being applicable to industrialized application.

Description

technical field [0001] The present invention relates to a novel supported catalyst, its preparation method and use. Background technique [0002] In recent years, the advanced oxidation technology using ozone as the main oxidant has been developed rapidly. The oxidation-reduction potential of ozone is as high as 2.08V. Ozone is easy to use and does not produce secondary pollution. It can effectively disinfect and remove color when used in wastewater treatment. At the same time, the mechanism of degrading organic matter has also been deeply studied. Although the ozone oxidation method has a strong ability to decolorize and remove organic pollutants, the operating cost of this method is relatively high, and it is selective to the oxidation of organic matter, and the pollutants cannot be completely mineralized in a low dose and in a short time. The resulting intermediate products prevent the ozone oxidation process. The ozone catalytic oxidation method is a new method for oxi...

Claims

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Application Information

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IPC IPC(8): B01J23/06B01J23/755C02F1/78
Inventor 王炜
Owner SHANGHAI EMPEROR OF CLEANING HI TECH
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