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Application of monolithic catalyst in catalytic decomposition of ozone

A monolithic catalyst, catalytic decomposition technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, separation methods, etc. Weak, catalyst performance deterioration and other problems, to achieve the effect of high application value and practicability, excellent ozone conversion rate and stability

Pending Publication Date: 2022-04-26
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coating process of the powder catalyst is complicated, and the binding force between the catalyst and the carrier is weak, which easily leads to the performance degradation of the overall catalyst

Method used

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  • Application of monolithic catalyst in catalytic decomposition of ozone
  • Application of monolithic catalyst in catalytic decomposition of ozone
  • Application of monolithic catalyst in catalytic decomposition of ozone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] This embodiment provides an application of a monolithic catalyst in the catalytic decomposition of ozone, and the specific steps of the application are:

[0039] (1) Weigh 2mmol iron nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O), 4mmol ammonium fluoride (NH 4 F) Dissolve 5mmol of urea (Urea) in 40mL of deionized water, stir for 20min to mix the solution evenly, add the above solution into a 50mL hydrothermal reaction kettle, and then add a piece of 2×20×30mm nickel foam into the reaction kettle , and then sealed and placed in an oven at 120°C for 6 hours. After the reaction was completed, the hydrothermal kettle was cooled to room temperature, and the obtained monolithic catalyst was washed to neutrality, and dried (60°C, 10h) to obtain a block-shaped monolithic catalyst, which was denoted as : NF-2-4-5-40;

[0040] (2) Cut the block monolithic catalyst into discs with a diameter of 8 mm for later use. A monolithic catalyst with a thickness of 2 mm and a diameter of 8 m...

Embodiment 2

[0042] This embodiment provides an application of a monolithic catalyst in the catalytic decomposition of ozone, and the specific steps of the application are:

[0043] (1) Weigh 2mmol iron nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O), 4mmol ammonium fluoride (NH 4 F) Dissolve 10mmol of urea (Urea) in 40mL of deionized water, stir for 20min to mix the solution evenly, add the above solution into a 50mL hydrothermal reaction kettle, and then add a piece of 2×20×30mm nickel foam into the reaction kettle , and then sealed and placed in an oven at 120°C for 6 hours. After the reaction was completed, the hydrothermal kettle was cooled to room temperature, and the obtained monolithic catalyst was washed to neutrality, and dried (60°C, 10h) to obtain a block-shaped monolithic catalyst, which was denoted as : NF-2-4-10-40;

[0044] (2) Cut the block monolithic catalyst into discs with a diameter of 8 mm for later use. A monolithic catalyst with a thickness of 2 mm and a diameter of 8...

Embodiment 3

[0046] This embodiment provides an application of a monolithic catalyst in the catalytic decomposition of ozone, and the specific steps of the application are:

[0047] (1) Weigh 2mmol iron nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O), 4mmol ammonium fluoride (NH 4 F) Dissolve 15mmol of urea (Urea) in 40mL of deionized water, stir for 20min to mix the solution evenly, add the above solution into a 50mL hydrothermal reaction kettle, and then add a piece of 2×20×30mm nickel foam into the reaction kettle , and then sealed and placed in an oven at 120°C for 6 hours. After the reaction was completed, the hydrothermal kettle was cooled to room temperature, and the obtained monolithic catalyst was washed to neutrality, and dried (60°C, 10h) to obtain a block-shaped monolithic catalyst, which was denoted as : NF-2-4-15-40;

[0048] The XRD figure of described monolithic catalyst is as follows figure 1 As shown, the SEM image of the monolithic catalyst is as follows figure 1 As shown...

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Abstract

The invention provides an application of a monolithic catalyst in catalytic decomposition of ozone. The monolithic catalyst comprises foamed nickel and a nickel-iron layered double-metal hydroxide loaded on the foamed nickel. The catalyst provided by the invention is simple in preparation process, can stably and efficiently decompose ozone under harsh conditions, and can be applied to treatment of various gases containing ozone.

Description

technical field [0001] The invention belongs to the technical field of environmental catalysis, and relates to the application of an integral catalyst in catalytic decomposition of ozone. Background technique [0002] Ozone is widely used in medical and health care, food preservation and water treatment due to its strong oxidation performance. However, ozone has a long half-life, and it is easy to cause residues during use. It is directly discharged into the atmosphere, which will seriously affect human health. living environment. In addition, the concentration of ozone in the atmosphere is very low, while the concentration of water vapor that competes and inhibits the decomposition of ozone is very high, so it is very difficult to decompose low-concentration ozone under high humidity conditions. [0003] CN111408378A discloses a powder catalyst for ozonolysis, which is a layered double metal hydroxide with nickel-iron hydrotalcite structure and has excellent ozonolysis act...

Claims

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Application Information

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IPC IPC(8): B01J23/755B01D53/86B01D53/66
CPCB01J23/755B01D53/8675Y02A50/20
Inventor 贺泓马金珠王志胜
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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