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Room-temperature efficient ozone decomposition catalyst and preparation method thereof

A technology of ozone decomposition and catalyst, applied in separation methods, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as large wind resistance, contrary to the concept of energy saving, and increased energy consumption, and achieve The effect of long service life, high product strength and rich channels

Active Publication Date: 2012-06-27
SUZHOU IND PARK ANZEWEN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the amount of air that needs to be processed in industry is also relatively large. If the catalyst can only be used at low space velocity, the size of the ozone absorption tower must be large and the packing must be large, which brings great wind resistance. , resulting in an increase in energy consumption, which is contrary to the concept of energy saving, so the catalyst is required to work stably and safely at a large space velocity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The present embodiment provides a normal temperature high-efficiency ozone decomposition catalyst, which is prepared as follows:

[0030] (1), prepare the mixed aqueous solution A of manganese nitrate, cerium nitrate, silver nitrate, wherein the concentration of manganese nitrate, cerium nitrate, silver nitrate is respectively 0.58mol / L, 0.22mol / L and 0.046mol / L; Preparation potassium carbonate, Mixed aqueous solution B of potassium bicarbonate and potassium chlorate, wherein the concentrations of potassium carbonate, potassium bicarbonate and potassium chlorate are 0.50 mol / L, 0.214 mol / L and 0.036 mol / L, respectively.

[0031](2) Under the condition of stirring, with the ratio of volume ratio A:B=1:4.48, the flow rate per unit contact area is 250mL / min·cm 2 Add solution B to solution A, and continue to stir for 1 hour. After the solution is fully reacted, transfer the solution into a high-pressure reactor, and add N,N-diethylethylamine at a ratio of 5 g / L, seal it, an...

Embodiment 2

[0035] The present embodiment provides a normal temperature high-efficiency ozone decomposition catalyst, which is prepared as follows:

[0036] (1), prepare the mixed aqueous solution A of manganese nitrate, cerium nitrate, silver nitrate, wherein the concentration of manganese nitrate, cerium nitrate, silver nitrate is respectively 0.58mol / L, 0.22mol / L and 0.046mol / L; Preparation potassium carbonate, Mixed aqueous solution B of potassium bicarbonate and potassium chlorate, wherein the concentrations of potassium carbonate, potassium bicarbonate and potassium chlorate are 0.50 mol / L, 0.214 mol / L and 0.036 mol / L, respectively.

[0037] (2) Under the condition of stirring, with the ratio of volume ratio A:B=1:4.48, the flow rate per unit contact area is 250mL / min·cm 2 Add solution B to solution A, and continue to stir for 1 hour. After the solution is fully reacted, transfer the solution into a high-pressure reactor, and add N,N-diethylethylamine at a ratio of 5 g / L, seal it, a...

Embodiment 3

[0041] The present embodiment provides a normal temperature high-efficiency ozone decomposition catalyst, which is prepared as follows:

[0042] (1), prepare the mixed aqueous solution A of manganese nitrate, cerium nitrate, silver nitrate, wherein the concentration of manganese nitrate, cerium nitrate, silver nitrate is respectively 0.58mol / L, 0.22mol / L and 0.046mol / L; Preparation potassium carbonate, Mixed aqueous solution B of potassium bicarbonate and potassium chlorate, wherein the concentrations of potassium carbonate, potassium bicarbonate and potassium chlorate are 0.50 mol / L, 0.214 mol / L and 0.036 mol / L, respectively.

[0043] (2) Under the condition of stirring, with the ratio of volume ratio A:B=1:4.48, the flow rate per unit contact area is 250mL / min·cm 2 Add solution B to solution A, and continue to stir for 1 hour. After the solution is fully reacted, transfer the solution into a high-pressure reactor, and add N,N-diethylethylamine at a ratio of 5 g / L, seal it, a...

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Abstract

The invention discloses a room-temperature efficient ozone decomposition catalyst and a preparation method thereof. The catalyst is prepared by the following steps of: preparing manganese nitrate, cerous nitrate and silver nitrate into a solution according to a mol ratio of 1: (0.3-0.5): (0.01-0.1); taking potassium carbonate and / or potassium bicarbonate as a precipitant, taking potassium chlorate as an oxidant, and precipitating to prepare active components; and then, adding N,N-diethyl ethylamine and crystallizing in a reaction kettle at a temperature in a range of 180-220 DEG C; after the crystallization, carrying out filter pressing to obtain sediments with the water content of 70-80 wt%; and then, adding a binding agent and a pore-forming agent and uniformly agitating; conveying the mixture into a banded extruder to be extruded and molded into cylindrical grains; drying the cylindrical grains at a temperature in a range of 80-100 DEG C and adding the dried cylindrical grains intoa muffle furnace to be roasted at a temperature in a range of 450-550 DEG C. The ozone decomposition catalyst provided by the invention has the advantages of capabilities of completely purifying thousands of ppm of ozone at the room temperature and resisting the violent fluctuation of the ozone concentration, good water vapor resistance and long service life.

Description

technical field [0001] The invention relates to the fields of industrial and civil ozone application and purification, in particular to a catalyst capable of decomposing up to several thousand ppm of ozone at normal temperature and a preparation method thereof. Background technique [0002] Ozone is widely used. Industrial water treatment, flue gas desulfurization, and exhaust gas contain a large amount of undecomposed ozone. Disinfection and sterilization in the medical and health and catering industries, printers, copiers, and ultraviolet lamps will spread to the surrounding air during work. Ozone, my country stipulates that in the living environment, the ozone concentration exceeds 0.16mg / m 3 air pollution; in the workplace, the ozone concentration exceeds 0.2mg / m 3 Therefore, in the place where ozone is generated, the decomposition and purification of ozone should be carried out in time to avoid harm to the surrounding people. [0003] After the temperature exceeds 100°...

Claims

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Application Information

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IPC IPC(8): B01J23/68B01D53/86B01D53/66
CPCY02A50/20
Inventor 陈艳珍
Owner SUZHOU IND PARK ANZEWEN ENVIRONMENTAL PROTECTION TECH
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