Composite iron-based catalyst for catalytic oxidation and application thereof

An iron-based catalyst, catalytic oxidation technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, oxidized water/sewage treatment, etc., can solve the problem of high cost and achieve strong tolerance , high reaction speed, not easy to be polluted and poisoned

Inactive Publication Date: 2020-06-09
上海尚析环保设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the ozone oxidation catalyst in the above-mentioned prior art has a higher cost, the present invention provides a composite iron-based catalyst for catalytic oxidation and its application
According to the composite iron-based catalyst for catalytic oxidation of the present invention, the cost is reduced by selecting iron powder, and the problem of high cost in the prior art is solved

Method used

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  • Composite iron-based catalyst for catalytic oxidation and application thereof
  • Composite iron-based catalyst for catalytic oxidation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Iron powder is selected and pretreated. The pretreatment refers to using 1mol / L NaOH to degrease and using 1% H 2 SO 4 Remove rust and other contaminants.

[0023] Take 70% of pretreated iron powder, mix with 10% carbon powder, 19.5% iron oxyhydroxide, 0.5% transition metal ingredients (Cu, Mn, Ni, Co, Ti, etc.), and use 30% H 2 o 2 Soak in the solution, passivate on a shaker for 8.0 to 10.0 hours, take it out, wash and dry, and obtain an iron-based composite catalyst, the main component of which is iron oxyhydroxide, expressed as FeOOH.

[0024] through as figure 1 The membrane separation reactor shown performs catalytic oxidation. Wherein, the membrane separation reactor includes a catalytic reaction tank 1 carrying an iron-based composite catalyst A and a membrane separation tank 2 communicated with the catalytic reaction tank 1 through a perforated partition wall 1a, and the ozone generator 3 is communicated with the catalytic reaction tank 1 To feed O into th...

Embodiment 2

[0027] Iron powder pretreatment step is the same as embodiment 1.

[0028] Take 70% of the pretreated iron powder, mix it with 30% carbon powder, and use 30% H 2 o 2 Soak in the solution, passivate on a shaker for 8.0 to 10.0 hours, take it out, wash and dry, and obtain an iron-based composite catalyst, the main component of which is iron oxyhydroxide, expressed as FeOOH.

[0029] The catalytic oxidation reactor is the same as in Example 1.

[0030] Catalytic O 3 Oxidation performance: The COD of the secondary biochemical effluent of a sewage treatment station in an electronics factory is 90mg / L. o 3 Catalytic oxidation reaction residence time is 40min, O 3 The dosage is 75mg / l, and the concentration of the prepared iron-based composite catalyst is 8g / L. After the catalytic oxidation reaction, the COD is 40mg / L, the removal rate is 55%, the total iron content in the effluent is less than 0.5mg / l, the effluent water quality and the service life of the catalyst have very g...

Embodiment 3

[0032] Iron powder pretreatment step is the same as embodiment 1.

[0033] Take 90% of the pretreated iron powder, mix it with 10% carbon powder, and use 30% H 2 o 2 Soak in the solution, passivate on a shaker for 8.0 to 10.0 hours, take it out, wash and dry, and obtain an iron-based composite catalyst, the main component of which is iron oxyhydroxide, expressed as FeOOH.

[0034] The catalytic oxidation reactor is the same as in Example 1.

[0035] Catalytic O 3 Oxidation performance: The COD of the secondary biochemical effluent of a sewage treatment station in a paint chemical factory is 100mg / L. o 3 Catalytic oxidation reaction residence time is 50min, O 3 The dosage is 80mg / l, and the concentration of the prepared iron-based composite catalyst is 12g / L. After the catalytic oxidation reaction, the COD is 55mg / L, the removal rate is over 40%, the total iron content in the effluent is less than 0.5mg / l, the effluent water quality and the service life of the catalyst ha...

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Abstract

The invention relates to a composite iron-based catalyst for catalytic oxidation. The composite iron-based catalyst comprises 70wt%-90wt% of iron powder, 10wt%-30wt% of activated carbon powder, 0-20wt% of iron oxyhydroxide and 0-0.5wt% of transition metal and / or transition metal oxide. The invention also provides an application of the composite iron-based catalyst in catalytic oxidation of wastewater. The composite iron-based catalyst for catalytic oxidation according to the invention exists in the form of powder, the catalyst can be uniformly dispersed in the wastewater like a homogeneous reaction, therefore, the collision contact opportunity of ozone dissolved in water and the catalyst is larger, the collision contact speed of the generated hydroxyl radicals and organic matters in the wastewater is higher, more ozone participates in the reaction, the reaction speed is higher, the operation cost and the investment cost are lower, the treatment effect is better, and the effluent quality is better.

Description

technical field [0001] The invention relates to waste water treatment, in particular to a composite iron-based catalyst for catalytic oxidation and application thereof. Background technique [0002] With the rapid development of industry and agriculture in our country, there are more and more toxic or refractory organic components in water, and how to deal with such substances and improve their treatment effect has become a topic of concern in the water treatment industry. Advanced oxidation processible (Advanced Oxidation processible, referred to as AOP), the oxidation process in which hydroxyl radicals are used as the main oxidant in the water treatment process is called the AOP process. Ozone catalytic oxidation is a commonly used advanced oxidation technology. The advantages of being easy to obtain, no need for complicated equipment, and being environmentally friendly have been gradually applied to various wastewater treatment projects such as chemicals, dyes, and pestic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J23/75B01J23/889B01J23/755C02F1/72C02F1/78
CPCB01J23/745B01J23/8892B01J23/755B01J23/75C02F1/725C02F1/78
Inventor 刘新亚马鲁铭
Owner 上海尚析环保设备有限公司
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