Iron-carbon composite Fenton catalyst as well as preparation method and application thereof

A catalyst, iron-carbon technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of slow regeneration of Fenton reagent, insufficient mineralization of organic matter, insufficient utilization rate, etc., and achieve reduction Effects of pollution and harm, low cost, and convenient operation

Pending Publication Date: 2022-07-22
RES & DEV INST OF NORTHWESTERN POLYTECHNICAL UNIV IN SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The core of the Fenton method application is the Fenton reagent system, the traditional Fenton reagent is ferrous (Fe 2+ ) solution as a catalyst, which degrades pollutants through homogeneous Fenton action. effect, and introduce photochemistry and electrochemistry into the Fenton reaction system to form a variety of Fenton or Fenton-like systems to strengthen the Fenton effect, improve the pollutant removal effect, and overcome the H 2 o 2 Insufficient utilization rate, organic matter cannot be fully mineralized, the pH value of the effective reaction solution is limited to about 3.0, and a large amount of iron sludge that needs further treatment is produced after the reaction, the regeneration of Fenton reagent is slow, and the use cost is high. The shortcomings of the traditional Fenton reaction

Method used

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  • Iron-carbon composite Fenton catalyst as well as preparation method and application thereof
  • Iron-carbon composite Fenton catalyst as well as preparation method and application thereof
  • Iron-carbon composite Fenton catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Collect a certain amount of kitchen waste, sort and remove impurities, remove impurities that cannot be carbonized, such as glass, metal, ceramics, etc., use a stirring and crusher to crush and homogenize, then drain the kitchen waste, weigh and drain After 100g of kitchen waste, add 100ml of deionized water to mix, add the mixture to a 500ml stainless steel reaction kettle, heat the mixture to 40°C, stir for 10min, and then ferric nitrate (Fe(NO) 3 ) 3 ) solution was added to the mixed solution (0.1mol / L), 5ml absolute ethanol was added dropwise as a dispersant, and stirring was continued for 5min; after the reactor was sealed, it was placed in a hydrothermal reaction device equipped with temperature control, electric heating and stirring Gradient heating was carried out, and the heating program was 170°C (1h), 200°C (3h), 230°C (5h) and 260°C (10h), while stirring (100r / min), the heating rate was kept at 3°C / min; the reaction was over Then, the reaction kettle was co...

Embodiment 2

[0039]Collect a certain amount of kitchen waste, sort and remove impurities, remove impurities that cannot be carbonized, such as glass, metal, ceramics, etc., use a stirring and crusher to crush and homogenize, then drain the kitchen waste, weigh and drain After 150g of kitchen waste, add 150ml of deionized water to mix, add the mixture to a 500ml stainless steel reaction kettle, heat the mixture to 45°C, stir for 20min, and add ferric chloride (FeCl 3 ) solution was added to the mixed solution (0.3mol / L), 7.5ml of absolute ethanol was added dropwise as a dispersant, and the stirring was continued for 8min; after the reactor was sealed, it was placed in a hydrothermal reaction device equipped with temperature control, electric heating and stirring Gradient heating was carried out during the heating process, and the heating program was 180°C (1h), 210°C (3h), 240°C (5h) and 270°C (10h), while stirring (150r / min), the heating rate was maintained at 4°C / min; the reaction After t...

Embodiment 3

[0041] Collect a certain amount of kitchen waste, sort and remove impurities, remove impurities that cannot be carbonized, such as glass, metal, ceramics, etc., use a stirring and crusher to crush and homogenize, then drain the kitchen waste, weigh and drain After 200g of kitchen waste, add 200ml of deionized water to mix, add the mixture to a 500ml stainless steel reaction kettle, heat the mixture to 50°C, stir for 30min, and then add iron sulfide (FeSO4). 4 ) solution was added to the mixed solution (0.5mol / L), 10ml of absolute ethanol was added dropwise as a dispersant, and the stirring was continued for 10min; after the reactor was sealed, it was placed in a hydrothermal reaction device equipped with temperature control, electric heating and stirring Gradient heating was carried out, and the heating program was 190°C (1h), 220°C (3h), 250°C (5h) and 280°C (10h), while stirring (200r / min), the heating rate was kept at 5°C / min; the reaction was over After that, the reaction ...

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Abstract

The invention discloses an iron-carbon composite Fenton catalyst as well as a preparation method and application thereof, the composite Fenton catalyst is prepared by reacting kitchen waste with an iron salt solution through a one-step method on the basis that the kitchen waste contains a large amount of biomass and rich organic carbon substances, the kitchen waste is subjected to resource reutilization through simple and feasible operation, and the iron-carbon composite Fenton catalyst has the advantages of environmental protection, energy conservation and environmental protection. The preparation method is easy to implement, and the prepared composite catalyst is high in catalytic efficiency, high in self-regeneration capacity and low in cost, so that the defects that a traditional Fenton catalyst is low in efficiency, difficult to regenerate, large in dosage and high in cost are overcome, and meanwhile recycling of kitchen waste is achieved.

Description

technical field [0001] The invention belongs to the fields of water treatment and solid waste treatment and resource utilization, and relates to an iron-carbon composite Fenton catalyst and a preparation method and application thereof. Background technique [0002] Fenton reaction is under acidic conditions, hydrogen peroxide (H 2 O 2 ) in the catalyst ferrous (Fe 2+ ) generates hydroxyl radicals (OH) under the action of OH, the redox potential of OH is as high as 2.80V, the oxidation is extremely strong, it has electronegativity or electrophilicity, and the electron affinity can reach 569.3kJ, which has strong addition reaction characteristics. OH can react with most organics in a non-selective manner, and it shows unique advantages in the treatment of organic wastewater that is difficult to treat by biodegradation and chemical oxidation, especially in the treatment of refractory pollutants with high concentration and high toxicity. [0003] The core of the Fenton method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J37/08C02F1/72C02F101/38
CPCB01J23/745B01J37/084C02F1/722C02F1/725C02F2305/026C02F2101/38
Inventor 胡思海马丽莎孙然肉孜姑·吾斯曼孙晓锋吴耀国
Owner RES & DEV INST OF NORTHWESTERN POLYTECHNICAL UNIV IN SHENZHEN
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