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Catalyst for purifying indoor air and preparation method thereof

A technology of indoor air and catalyst, which is applied in the field of catalyst and its preparation, can solve the problems of ineffective elimination of organic pollutants and environmental pollution, and achieve the effects of scientific composition and proportion, convenient use and good activity

Inactive Publication Date: 2009-06-10
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Simple adsorption purifiers can effectively remove pollutants and obtain clean air, but the adsorbent needs to be replaced frequently, and the replaced adsorbent will pollute the environment; although negative ion generators can freshen the air, for formaldehyde in the air, The elimination effect of organic pollutants such as benzene is not obvious, and this is the defective of prior art

Method used

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  • Catalyst for purifying indoor air and preparation method thereof
  • Catalyst for purifying indoor air and preparation method thereof
  • Catalyst for purifying indoor air and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Weigh 25 grams of alumina, 20 grams of titanium oxide, 100 grams of water, ball mill for 10 hours, take out, dry at 110°C, bake at 500°C for 5 hours, and grind into powder to obtain a composite oxide carrier of titanium oxide and aluminum oxide.

[0042] Sequentially weigh 5.2 grams of ferric nitrate, 2.3 grams of cobalt nitrate, and 2 grams of citric acid; take 10 ml of platinum nitrate solution according to the mass of 0.225 grams of platinum, make 50 ml of aqueous solution, impregnate the above carrier, dry at 110 ° C, and roast at 500 ° C for 2 Hour.

[0043] The above catalyst is mixed with air containing 100ppm benzene and 20ppm formaldehyde, and the volume space velocity is 20000h -1 Under the conditions, the complete conversion to CO 2 and H 2 O. The conversion rate of formaldehyde at 180°C is 99%, and the conversion rate of benzene at 250°C is 98%.

Embodiment 2

[0045] Weigh 45 grams of alumina, 100 grams of water, ball mill for 10 hours, take out, dry at 110°C, bake at 500°C for 5 hours, and grind into powder to obtain alumina carrier.

[0046] Weigh 5.2 grams of ferric nitrate, 2.3 grams of cobalt nitrate, and 1.2 grams of citric acid; take 10 ml of platinum nitrate solution based on the mass of 0.225 grams of platinum, make 50 ml of aqueous solution, impregnate the above carrier, dry at 110 ° C, and roast at 500 ° C for 2 hours .

[0047] The above catalyst is mixed with air containing 100ppm benzene and 20ppm formaldehyde, and the volume space velocity is 20000h -1 Under the conditions, the complete conversion to CO 2 and H 2 O. The conversion rate of formaldehyde at 180°C is 95%, and the conversion rate of benzene at 250°C is 90%.

Embodiment 3

[0049] Weigh 11 grams of alumina, 33 grams of titanium oxide, 100 grams of water, ball mill for 10 hours, take out, dry at 110°C, bake at 500°C for 5 hours, and grind into powder to obtain a composite oxide carrier of titanium oxide and aluminum oxide.

[0050] Weigh 5.2 grams of ferric nitrate, 2.3 grams of cobalt nitrate, and 1.2 grams of citric acid; based on the mass of 0.225 grams of platinum, take 10 ml of platinum nitrate solution, make 50 ml of aqueous solution, impregnate the above carrier, dry at 110 ° C, and roast at 500 ° C for 3 hours .

[0051] The above catalyst is mixed with air containing 100ppm benzene and 20ppm formaldehyde, and the volume space velocity is 20000h -1 Under the conditions, the complete conversion to CO 2 and H 2 O. The conversion rate of formaldehyde at 180°C is 96%, and the conversion rate of benzene at 250°C is 89%.

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Abstract

The invention provides a catalyst for purifying indoor air and a preparation method thereof. The compositions of the catalyst comprise: Pt is loaded on Al2O3 or a composite carrier of TiO2 and Al2O3; metal oxide such as MnO2 is taken as an auxiliary agent; and the catalyst is used for a novel indoor air purification device. The purification device comprises a shell, a control system, an induced draught system, an adsorption system and a catalytic combustion system. The purification device breaks through the prior mode of purifying the indoor air by replacing an adsorbent, organically combines the adsorption system and the catalytic combustion system, converts harmful substances into harmless CO2 and H2O, and forms an effective air purification system. The catalyst has high catalytic efficiency; the preparation method is simple; and after the device is operated in a 50m<3> room with the formaldehyde concentration of 1.4 mg / m<3> for 24 hours, the formaldehyde concentration of the room is 0.06 mg / m<3> when detected by a phenol reagent method and is lower than the national indoor air pollutant standard, namely 0.10 mg / m<3>.

Description

technical field [0001] The invention relates to a catalyst which can be used for indoor air purification and a preparation method thereof. Background technique [0002] With economic development and social progress, people's activities are more concentrated indoors, and the requirements for indoor air quality are getting higher and higher. Due to the use of decorative materials containing a large amount of formaldehyde in interior decoration and indoor supplies, indoor air pollution has increased in recent years. With the continuous improvement of people's living standards and living conditions, a healthy and comfortable indoor environment will become an inevitable pursuit. [0003] At present, the actual application of indoor air purifiers in our country basically adopts methods such as mechanical filtration, activated carbon adsorption and negative air ion generator alone or in part, or a combination of the above methods. Simple adsorption purifiers can effectively remov...

Claims

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Application Information

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IPC IPC(8): B01J23/89A61L9/00A62D3/38A62D101/28
Inventor 杨向光李静肖德海张兴文
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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