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Modified zeolite for degrading ozone-containing waste gas and preparation method for modified zeolite

A technology for modifying zeolite and waste gas, which is applied in the field of modified zeolite and achieves the effects of simple preparation process, simple production and preparation process, and long-term stable application.

Inactive Publication Date: 2012-07-11
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if zeolite is directly used to degrade ozone-containing waste gas without treatment, its degradation ability is poor and its stability is also poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) At a constant temperature of 60°C, add 0.2M sodium carbonate to 0.2M ferrous sulfate solution while stirring at a constant speed, so that the pH of the solution reaches 1.6 to obtain an iron-containing sol.

[0021] (2) Put 100g of zeolite into 500mLHNO with a pH value of 4.5 3 Into the solution, slowly add 200mL of the above-mentioned iron-containing sol during constant speed shaking, keep shaking for 2h, and take out the zeolite by centrifugation.

[0022] (3) The above zeolite uses NaH with a pH value of 7 2 PO 3 —Na 2 HPO 3 After soaking in buffer solution for 4 hours, wash with pure water 3 times.

[0023] (4) The zeolite was taken out by centrifugation, dried at 105°C, and then calcined at 400°C for 2 hours to produce a heteroatom-modified zeolite, which was a reddish-brown solid particle.

[0024] Get 60g and pack the modified zeolite prepared through the above steps into a glass tube with a pipe diameter of 18mm, O 3 The flow rate is 12-13mg / min, the g...

Embodiment 2

[0026] (1) At a constant temperature of 60°C, add 0.2M sodium carbonate to 0.2M ferrous sulfate solution while stirring at a constant speed, so that the pH of the solution reaches 1.75 to obtain an iron-containing sol.

[0027] (2) Put 150g of zeolite into 800mLHNO with a pH value of 4.5 3 Into the solution, slowly add 375mL of the above-mentioned iron-containing sol during constant speed shaking, keep shaking for 2h, and take out the zeolite by centrifugation.

[0028] (3) The above zeolite uses NaH with a pH value of 7 2 PO 3 —Na 2 HPO 3 After soaking in buffer solution for 4 hours, wash with pure water 3 times.

[0029] (4) The zeolite was taken out by centrifugation, dried at 105°C, and then calcined at 400°C for 2 hours to produce a heteroatom-modified zeolite, which was a reddish-brown solid particle.

[0030] Get the glass tube that tube internal diameter is 30mm, the zeolite after the modification is all filled, tail gas detects ozone content with KI absorption li...

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PUM

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Abstract

The invention provides modified zeolite for degrading ozone-containing waste gas and a preparation method for the modified zeolite. Zeolite is taken as a raw material, a metal element iron is introduced in to a zeolite structure by a liquid-solid nanocrystal loading method, and hetero-atom zeolite with special catalytic performance is prepared. The modified zeolite is filled in an ozone degrading device, and the ozone-containing waste gas passes through the device and can be effectively degraded. The hetero-atom zeolite prepared by the method has the characteristics of low production cost, simple preparation process, high ozone degrading efficiency, simple operation and the like, and has a wide application prospect when serving as an environment function material.

Description

technical field [0001] The invention relates to a modified zeolite, in particular to a modified zeolite for degrading ozone-containing waste gas and a preparation method thereof. Background technique: [0002] Ozone is one of the common indoor air pollutants. Indoor office or household appliances, such as printers, copiers, ozone disinfection cabinets, and ozone air purifiers, can release ozone. Ozone is not only harmful to human health itself, but its chemical reactions with different organic substances in the room can seriously damage human body functions. The reaction between ozone and active volatile organic compounds in the room will generate a variety of harmful by-products and particulate matter. The reaction products include carcinogens (formaldehyde, acrolein), irritating substances (carbonyl, dicarbonyl, acids), free radicals, Secondary organic aerosols, and other oxidation products. It can be seen that indoor ozone not only has a pungent smell, but also poses a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/02B01J29/072B01D53/86B01D53/66
Inventor 刘海龙张智烨王瑞军
Owner SHANXI UNIV
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