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Supported catalyst for eliminating formaldehyde, preparation method and application thereof

A supported catalyst and formaldehyde elimination technology, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of high use temperature, need for specific excitation light source, low use temperature, etc., and achieve cost Low, less dosage, the effect of eliminating formaldehyde

Inactive Publication Date: 2009-10-21
承德宅急治室内环境治理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a catalyst for formaldehyde elimination with high activity and low use temperature as well as its preparation method and use, aiming at the shortcomings of the existing formaldehyde elimination catalyst, such as high service temperature and need for a specific excitation light source.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 0.0098mol Ce(NO 3 ) 3 ·6H 2 O and 0.049mol γ-Al 2 o 3 . Ce(NO 3 ) 3 ·6H 2 After O was dissolved in deionized water, it was added to γ-Al 2 o 3 , soaked for 6h, and dried at 60°C. The obtained solid was calcined at 300°C for 4h. That is, CeO 2 / Al 2 o 3 carrier.

[0024] Take 5mg / mlHAuCl 4 4H 2 O solution 40ml, add deionized water to dilute to 100ml, heat to 50°C, under constant temperature stirring, add NaOH solution dropwise to the solution to adjust pH=5.0. Then, 1.82 g of the above carrier was added to the solution, and stirred for 1 h. Cool, wash 5 times with deionized water, and wash with AgNO 3 Solution inspection until there is no precipitation (no Cl - ). The obtained solid was dried at 60°C and calcined at 200°C for 12h. The calcined solid is shaped. That is, Au / CeO 2 / Al 2 o 3 catalyst.

Embodiment 2

[0026] Weigh 0.00336mol Co(NO 3 ) 2 ·6H 2 O and 0.084mol silica gel, dissolved Co(NO 3 ) 2 ·6H 2 O. The above solution was added to silica gel, soaked for 24h, and dried at 120°C. The obtained solid was calcined at 800°C for 4h. i.e. get CoO x / SiO 2 carrier.

[0027] Take 2mg / ml HAuCl 4 4H 2 O solution 4ml, add deionized water to dilute to 100ml, heat to 80°C, stir at constant temperature, add urea solution dropwise to the solution to adjust pH=6.68, then add 1.91g of the above-mentioned carrier to the solution, and stir for 3h. Cool, wash 3 times with deionized water, and wash with AgNO 3 Solution test, no precipitation (no Cl - ). The obtained solid was dried at 120°C and calcined at 600°C for 4h. The calcined solid is shaped. Get Au / CoO x / SiO 2 catalyst. COO x It means that the valence state of Co in the catalyst is uncertain.

Embodiment 3

[0029] Weigh 0.0084mol Zn(NO 3 ) 2 ·6H 2 O and 0.084mol MCM-41, dissolved Zn(NO 3 ) 2 ·6H2 O. Add the above solution into MCM-41, soak for 10h, and dry at 180°C. The obtained solid was calcined at 300°C for 12h. That is, ZnO / SiO 2 carrier.

[0030] Take 2mg / ml of HAuCl 4 4H 2 O solution 10ml, add water to dilute to 100ml, heat to 70°C, stir at constant temperature, add KOH solution dropwise to the solution to adjust pH=9.0. Then, 1.90 g of the above carrier was added to the solution, and stirred for 2 h. Cool, wash 4 times with deionized water, and wash with AgNO 3 Solution test, no precipitation (no chloride ions). Then it was dried at 180°C, and the obtained solid was calcined at 300°C for 4h. The calcined solid is shaped. Get the Au / ZnO / SiO of the present invention 2 catalyst.

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PUM

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Abstract

The invention discloses a supported catalyst for eliminating formaldehyde, a preparation method and application thereof. The catalyst comprises an inert carrier, oxide of A and noble metal M, and is characterized in that the inert carrier is gamma-Al2O3 or mesoporous Al2O3 or a pure silicon mesoporous material, the noble metal M is Pt, Ru, Rh, Pd or Au, the A is Ce, Co, Zn, Fe or Ti, wherein the molar ratio of the A to Al or the A to Si is 1:5-25; and the catalyst contains 0.2 to 5 mass percent of noble metal M. The catalyst is prepared by the following steps that: a compound of the A is impregnated onto the inert carrier and then is roasted to obtain an inert carrier supported with the oxide of the A, and then the inert carrier supported with the oxide of the A is supported with noble metal components. The catalyst can maintain higher activity and stability to the formaldehyde at low temperature, and can perform catalytic oxidation on the formaldehyde without other additional devices to transform the formaldehyde into harmless H2O and CO2 further to realize the green elimination of the formaldehyde.

Description

technical field [0001] The invention relates to a supported catalyst for catalytic oxidation and a preparation method thereof, in particular to a supported catalyst for eliminating formaldehyde, a preparation method and application thereof. Background technique [0002] With the widespread use of various building decoration materials, a large number of artificial panels are used for interior decoration and furniture manufacturing, and a large amount of highly toxic formaldehyde is used as a raw material in the manufacturing process. Formaldehyde is a colorless and strongly irritating gas that lasts for several years. It has been identified as a carcinogenic and teratogenic substance by the World Health Organization. Allergies, nasopharyngeal discomfort, cough, acute and chronic bronchitis and other respiratory diseases can also cause nausea, vomiting, and gastrointestinal disorders. In severe cases, it can also cause persistent headache, pneumonia, pulmonary edema, loss of ...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J23/66B01J21/06B01J23/42B01J37/02B01J37/08A62D3/38A62D101/28
Inventor 鲁继青李洪芳罗孟飞
Owner 承德宅急治室内环境治理有限公司
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