Catalyst for catalytic oxidation elimination of formaldehyde and preparation method thereof

A technology to eliminate formaldehyde and catalyze oxidation, which is applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc. Expensive and other issues, to achieve the effect of improving adsorption performance, improving dispersion, and easy operation

Inactive Publication Date: 2019-04-30
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The supported Pt catalyst has high stability and can catalyze the oxidation of formaldehyde at room temperature. However, due to its high price, how to achieve low Pt loading, high dispersion, and high activity is the difficulty of current research.
The traditional hydrogen reduction method is easy to agglomerate Pt at high temperature, resulting in large particle size and low dispersion of Pt nanoparticles, which severely limits the improvement of its activity.

Method used

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  • Catalyst for catalytic oxidation elimination of formaldehyde and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) At room temperature, 0.05 g Na 2 CO 3 Dissolve in 5 g deionized water to get Na 2 CO 3 solution, using the equal volume impregnation method, the Na 2 CO 3 The solution was impregnated in 5 g of activated carbon and dried at 80 °C; then the dried sample was roasted at 400 °C for 4 hours under a hydrogen atmosphere to obtain pretreated activated carbon;

[0026] (2) Dissolve 0.05 g KCl in 5 g deionized water to obtain a KCl solution, then add KOH to adjust the pH value of the solution to 9, and use the equal volume impregnation method to impregnate the above solution into the pretreated activated carbon, at 80 °C After drying, it was roasted at 400°C for 5 hours under a nitrogen atmosphere to obtain sample A;

[0027] (3) Dissolve 0.05 g of cerium nitrate in 5 g of deionized water to obtain a cerium nitrate solution. Under ultrasonic conditions at 40 °C, slowly add 0.01 g of isopropanol to the cerium nitrate solution, and ultrasonically disperse for 1 hour. meth...

Embodiment 2

[0031] The preparation steps of Example 2 are the same as in Example 1, except that KCl in step (2) is replaced by KNO 3 , the obtained catalyst number is Cat-2.

Embodiment 3

[0033] The preparation steps of Example 3 are the same as those of Example 1, except that KCl in step (2) is replaced by K 2 SO 4, the resulting catalyst number is Cat-3.

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Abstract

The invention relates to a catalyst for catalytic oxidation elimination of formaldehyde and a preparation method thereof. The catalyst takes activated carbon as a carrier and platinum as a main activecenter, and the activated carbon is pretreated through Na2CO3 and hydrogen roasting, so that the adsorption performance of the catalyst to the formaldehyde is improved, and the formaldehyde is enriched in activated carbon pores; and by adding of a dispersing agent, a reducing agent and an accelerant, the high dispersion of low-loading platinum on the catalyst is realized, platinum nano-particleswith extremely small size are obtained, and more catalytic activity sites are exposed, so that the catalytic activity is greatly improved, and the catalyst can be used for continuous catalytic oxidation of the formaldehyde enriched in the catalyst into carbon dioxide and water under the condition of room temperature, and has good practical application prospect.

Description

technical field [0001] The invention provides a catalyst for catalytic oxidation to eliminate formaldehyde and a preparation method thereof, belonging to the technical field of catalyst preparation for indoor formaldehyde removal. Background technique [0002] In recent years, with the increasing air pollution, indoor air pollution has also received more and more attention. The continuous release of indoor volatile organic compounds poses a great threat to people's health, and among them, formaldehyde is the most common indoor volatile organic compound, and it is extremely harmful to the human body. In October 2017, the World Health Organization (WHO) and the International Agency for Research on Cancer (IARC) just evaluated and released the list of carcinogens, and formaldehyde ranked first in human carcinogens. The boards, coatings, adhesives, etc. used in interior decoration will release formaldehyde continuously. Therefore, the development of efficient and stable formald...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/63B01J37/02B01J37/16B01D53/86B01D53/72
CPCB01D53/8668B01D2257/704B01D2259/4508B01J23/63B01J35/0013B01J37/0201B01J37/16
Inventor 李伟刘琛欣关庆鑫
Owner NANKAI UNIV
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