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Catalyst for catalyzing ozone to oxidize volatile organic compounds and preparation method of catalyst

A volatile organic compound and ozone oxidation technology, applied in the environmental field, can solve the problem of low removal rate, achieve high activity, good mechanical and chemical stability, and low price

Active Publication Date: 2015-09-09
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the selectivity of ozone oxidation, its removal rate for saturated alkanes, aromatic hydrocarbons and other refractory pollutants is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: get 100ml dehydrated alcohol, adjust pH to 1 with 37% hydrochloric acid, then add 35g tin chloride pentahydrate and 4.3g cerium nitrate hexahydrate, finally add 25ml of 50% manganese nitrate, constant volume with dehydrated alcohol To 200ml, it is the impregnation solution containing Mn, Sn, Ce. Soak the cleaned nickel foam with a pore size of 0.1mm in the impregnating solution for 15 minutes, dry it in an oven at 70°C, and then bake it in a muffle furnace at 500°C for 3 hours. Repeat dipping, drying, and roasting for 5 times to obtain A catalyst for catalyzing the oxidation of volatile organic compounds by ozone. Catalyst performance evaluation: catalyst volume is 0.8L, gas flow rate is 5.0L min -1 , toluene and ozone inlet concentration are all 400mg m -3 , the toluene purification rate is over 96%, no ozone is detected at the outlet, and the catalyst performance has no obvious change after 40 hours of operation.

Embodiment 2

[0016] Embodiment 2: get 100ml dehydrated alcohol, adjust pH to 1 with 37% hydrochloric acid, then add 35g tin chloride pentahydrate, 4.3g hexahydrate cerium nitrate and 2.3g antimony trichloride, finally add 50% manganese nitrate 25ml , with absolute ethanol to 200ml, which is the immersion solution containing Mn, Sn, Ce, Sb. Soak the cleaned nickel foam with a pore size of 0.1 mm in the impregnation solution for 15 minutes, dry it in an oven at 70°C, and then bake it in a muffle furnace at 500°C for 3 hours. Repeat immersion, drying, and roasting for 10 times to obtain A catalyst for catalyzing the oxidation of volatile organic compounds by ozone. Catalyst performance evaluation: catalyst volume is 0.8L, gas flow rate is 5.0L min -1 , toluene and ozone inlet concentration are 200mg m -3 , The purification rate of toluene is 100%, and no ozone is detected at the export.

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PUM

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Abstract

The invention provides a catalyst for catalyzing ozone to oxidize volatile organic compounds. The catalyst comprises a nickel foam carrier and a MnOx-SnOx-CeOx-SbOx compound oxide. A preparation method is characterized in that the nickel foam is impregnated or coated with a metallic salt solution and is roasted at high temperature to obtain the catalyst for catalyzing the ozone to oxidize the volatile organic compounds. The catalyst has the advantages of high catalytic activity, low price and better mechanical and chemical stability, and can be used for catalyzing the ozone to oxidize and purify the volatile organic compounds in waste gases and indoor air.

Description

technical field [0001] The invention relates to the field of environmental technology, in particular to a catalyst for catalyzing ozone oxidation of volatile organic compounds and a preparation method. Background technique [0002] Volatile organic compounds (VOCs) are more active components in the atmosphere. They not only directly endanger human health, but also form secondary pollutants such as photochemical smog and organic aerosols in the atmosphere. etc. have an important impact. Therefore, exploring the purification treatment methods of VOCs and reducing VOCs emissions will help improve the quality of the air environment, protect the ecological environment and protect human health, and are also an urgent need for sustainable social and economic development. [0003] Ozone has a strong oxidizing ability, 1.5 times the oxidizing ability of chlorine gas. It is a broad-spectrum fungicide and is often used for sterilization and disinfection in medical and health care and ...

Claims

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Application Information

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IPC IPC(8): B01J23/843B01D53/86B01D53/76B01D53/44
Inventor 徐仲均段亚菲
Owner BEIJING UNIV OF CHEM TECH
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