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A kind of preparation method of the catalyst that uses expanded graphite as carrier to catalyze the decomposition of ozone

An expanded graphite, catalytic decomposition technology, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve the impact of catalyst performance, loss, and environmental hazards in the preparation process and other problems, to achieve the effect of improving disposal efficiency, excellent adsorption performance, and abundant active sites.

Active Publication Date: 2020-01-07
秦皇岛晟创科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are also some technical defects in the supported composite catalyst. For example, the performance of the catalyst is greatly affected by the carrier, the morphology, structure, composition and dispersion of the carrier are different, and the thermal stability and catalytic performance of the catalyst will be quite different; The active components and their distribution on the carrier and the existing form also have a significant impact on the performance of the catalyst; the catalyst activity is unstable, and the preparation process is harmful to the environment; the metal oxide on the catalyst surface will be lost due to leaching in the solution; in addition, in Loading Ag, Au and Pt precious metals on the carrier to prepare a composite catalyst can improve the catalytic activity of the catalyst, but the cost of catalyst preparation is too high and basically has no engineering practical value

Method used

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  • A kind of preparation method of the catalyst that uses expanded graphite as carrier to catalyze the decomposition of ozone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Preparation of expanded graphite carrier loaded with cerium active components:

[0037] First, the ozone pre-oxidation treatment of flake graphite: 150g deionized water is added into a beaker with a volume of 500mL, and the beaker filled with deionized water is placed on a multifunctional stirrer, and then 100g of flakes with a particle size of 80 mesh Add graphite into the beaker and turn on the stirring control switch of the stirrer; then insert the gas generating tube of the ozone generator into the bottom of the beaker, turn on the power switch of the ozone generator, the gas source used by the ozone generator is pure oxygen, and the gas generating tube is passed into the solution The amount of ozone is 5mg / L, and the flake graphite is subjected to ozone pre-oxidation at room temperature for 20min; flake graphite 3 times, then dry the flake graphite after ozone pre-oxidation treatment at 80°C for 8h;

[0038] Secondly, chemical oxidation intercalation treatment...

Embodiment 2

[0051] (1) Preparation of expanded graphite carrier loaded with cerium active components:

[0052] First, the ozone pre-oxidation treatment of flake graphite: first add 150g of deionized water into a beaker with a volume of 500mL, and place the beaker containing deionized water on a multifunctional stirrer, and then put 100g of deionized water with a particle size of 80 mesh Add flake graphite into the beaker and turn on the stirring control switch of the agitator; then insert the gas generating tube of the ozone generator into the bottom of the beaker and turn on the power switch of the ozone generator. The gas source used by the ozone generator is pure oxygen, which is passed into the The amount of ozone in the solution was 5 mg / L, and the flake graphite was subjected to ozone pre-oxidation for 24 minutes at room temperature; after the ozone pre-oxidation was completed, the solution was filtered to collect the ozone pre-oxidized flake graphite powder, and then the ozone pre-o...

Embodiment 3

[0065] (1) Preparation of expanded graphite carrier loaded with cerium active components:

[0066] First, the ozone pre-oxidation treatment of flake graphite: first add 150g of deionized water into a beaker with a volume of 500mL, and place the beaker containing deionized water on a multifunctional stirrer, and then put 100g of deionized water with a particle size of 80 mesh Add flake graphite into the beaker and turn on the stirring control switch of the agitator; then insert the gas generating tube of the ozone generator into the bottom of the beaker and turn on the power switch of the ozone generator. The gas source used by the ozone generator is pure oxygen, which is passed into the The amount of ozone in the solution was 5 mg / L, and the flake graphite was subjected to ozone pre-oxidation for 27 minutes at room temperature; after the ozone pre-oxidation was completed, the solution was filtered to collect the ozone-preoxidized flake graphite powder, and then the ozone pre-ox...

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Abstract

The invention provides a method for preparing a catalyst for catalytically decomposing ozone using expanded graphite as a carrier. The method mainly involves sequentially carrying out ozone oxidation, chemical oxidation intercalation, diethylene triamine amination and impregnation to support cerium ions on flake graphite, and Subsequent microwave expansion treatment prepared expanded graphite loaded with the active component cerium; then the prepared expanded graphite was impregnated, loaded with manganese ions, and subjected to high-temperature sintering to obtain an expanded graphite carrier loaded with the active component cerium. and manganese catalysts. The catalyst prepared by the invention can efficiently catalyze ozone to generate hydroxyl radicals, thereby achieving excellent removal of refractory and highly toxic organic pollutants in the water environment. Its application prospects in the field of wastewater pollution control are promising.

Description

technical field [0001] The invention relates to a preparation method of a catalyst. Background technique [0002] With the rapid development of the industrial and agricultural economy, the types of organic pollutants discharged into the water environment such as pesticides, herbicides, antibiotics, and dyes are becoming more and more complicated, and their concentration is also increasing. These organic substances are usually not easy to biodegrade and are easy to It accumulates in organisms and has carcinogenic and mutagenic effects, which has seriously affected the safety of aquatic biological systems, and also brought great challenges to the safety of urban water supply and human health. Therefore, the research and development of new processes and technologies for the economical and efficient removal of refractory organic pollutants in water bodies has become the top priority of the current water pollution prevention and control work. The main technologies used to remove...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/34C02F1/72C02F1/78
CPCC02F1/725C02F1/78B01J23/34B01J37/0207B01J37/0213B01J37/346C02F2305/023B01J35/60
Inventor 宋来洲霍思月张志辉贺君王伟邢丽飞
Owner 秦皇岛晟创科技有限公司
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