Low temperature type catalyst for removing formaldehyde and preparation method of low temperature type catalyst

A technology for eliminating formaldehyde and catalysts. It is applied in chemical instruments and methods, separation methods, and dispersed particle separation. It can solve the problems of large specific surface and high operating temperature, and achieve easy dispersion, improved wear resistance, and excellent bonding performance. Effect

Inactive Publication Date: 2014-04-02
LANZHOU ZHONGKE KAIDI CHEM NEW TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a low-temperature type catalyst for eliminating formaldehyde and a preparation method for the shortcomings of the existing formaldehyde elimination catalyst, such as high service temperature and need for a specific excitation light source. The catalyst has good catalytic performance and is compatible with Compared with the prior art, the catalyst coating of the present invention has good cohesiveness, large specific surface area, easy highly dispersed active components, simple preparation process, high catalytic activity, low cost and convenient operation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Take the cordierite carrier and dry it at 60°C for 1 hour for later use; weigh the alumina powder and aluminum nitrate respectively according to the molar ratio of alumina and aluminum nitrate at 5:1, so that the alumina content in the catalyst is 5wt%, and weigh the mass of aluminum nitrate 10% of the cerium nitrate, carry out full ball milling, ball milling time is 0.5h, after ball milling, add water and stir for 0.5h, stirring speed 500r / min;

[0023] 2. Stirring time is 0.5h, put the dried carrier cordierite in the slurry for 10min, take it out, blow out the liquid in the gap with compressed air, dry at 90°C for 3h, roast for 3h, and coat the coated cordierite The carrier was impregnated in palladium chloride solution so that the content of active metal in the catalyst was 0.01%. After immersion for 5 minutes, it was taken out, dried at 90°C for 1h, calcined at 400°C for 2h, and reduced in a hydrogen atmosphere at 200°C for 2h. A catalyst for catalytically elimin...

Embodiment 2

[0026] The preparation method is the same as in Example 1, except that lanthanum nitrate with 10% aluminum nitrate mass is weighed.

[0027] Experimental results: The activity experiment conditions are the same as in Example 1, the formaldehyde elimination rate at normal temperature is 99.8%, and the carbon dioxide selectivity is 100%.

Embodiment 3

[0029] The preparation method is the same as in Example 1, except that zirconium nitrate with 10% aluminum nitrate mass is weighed.

[0030] Experimental results: The activity experiment conditions are the same as in Example 1, the formaldehyde elimination rate at normal temperature is 97.6%, and the carbon dioxide selectivity is 99.5%.

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Abstract

The invention discloses a low temperature type catalyst for removing formaldehyde and a preparation method of the low temperature type catalyst and relates to a substance capable of fully catalyzing and oxidizing indoor formaldehyde into water and carbon dioxide at normal temperatures, belonging to the technical field of chemical engineering. The catalyst is an integral honeycomb ceramic type catalyst adopting an assistant such as aluminum oxide as a coating and adopting Pt, Pd or the random mixture of Pt and Pd as an active component, wherein the total content of the active component is 0.01-0.1%, and the total content of the coating is 5-20wt%. The preparation method of the catalyst comprises the steps of treating a carrier, preparing slurry, coating the slurry, and loading and activating the active component. The low temperature type catalyst for removing formaldehyde and the preparation method of the low temperature type catalyst have the characteristics of large surface area of the carrier, good cohesive property and easiness in operation, high catalyst activity, long service life and capability of fully removing formaldehyde at room temperature.

Description

technical field [0001] The invention relates to a substance capable of completely catalytically oxidizing indoor formaldehyde into water and carbon dioxide at normal temperature, which belongs to the technical field of chemical industry, in particular to a low-temperature catalyst for eliminating formaldehyde and a preparation method thereof. Background technique [0002] Today, as people pay more and more attention to the quality of life, indoor air pollution control and governance have attracted much attention. As one of the serious pollutants, formaldehyde has a wide range of sources and a long release period, which is extremely harmful to the human body. It is on the list of priority control of toxic chemicals in my country It ranks second on the list and has been determined by the World Health Organization as a carcinogenic and teratogenic substance. Long-term exposure to low-dose formaldehyde can cause chronic respiratory diseases, nasopharyngeal cancer, nuclear gene mut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/63B01J23/44B01D53/90B01D53/72
Inventor 杨玉霞孙鲲鹏顾玉林
Owner LANZHOU ZHONGKE KAIDI CHEM NEW TECH
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