A composite material for purifying formaldehyde in air stream

A composite material and formaldehyde purification technology, applied in the field of composite materials, can solve problems such as large difference in effect, catalyst deactivation, and formaldehyde purification rate is difficult to exceed 90%, so as to reduce the degree of adsorption of CO2 and ensure the effect of adsorption.

Active Publication Date: 2021-09-17
霍宜康上海科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, it is found that formaldehyde is catalyzed and decomposed into water and carbon dioxide. Among them, water will deactivate the catalyst, and carbon dioxide will be adsorbed by porous materials, resulting in lower and lower performance of the catalyst for catalytic decomposition of formaldehyde.
Moreover, the prepared catalyst material has a large difference between the laboratory measurement effect and the actual application effect. This is because a single formaldehyde gas is often used in the laboratory for effect measurement, and the actual application gas also contains benzene, toluene, Xylene, acetone, water and other types of gases compete with formaldehyde in the catalytic process for adsorption, resulting in a huge difference between the final formaldehyde purification effect and the laboratory effect
[0004] In the previous work of the applicant, a purification material for purifying formaldehyde gas in indoor air has been proposed, which overcomes the technical problem of low formaldehyde purification rate caused by the competitive adsorption of various polluting gases on the adsorption material, but its formaldehyde purification effect Unsatisfactory (formaldehyde purification rate is difficult to break through 90%)
Aiming at this technical problem, the applicant further improved the technical solution, and further provided a new type of composite material for purifying formaldehyde in the air stream on the basis of the previous work, so as to solve the technical problem that the purifying effect of formaldehyde is not high

Method used

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  • A composite material for purifying formaldehyde in air stream

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Crush amantadine into granules and put it into a beaker, add appropriate amount of ethylenediamine and water, and use an ultrasonic cell disruptor to sonicate it for 15 minutes, set the frequency to 20kHz, and the power to 900w. After ultrasonic treatment, place the beaker in the ice-water mixture, add the rotor after it cools down, and add appropriate amount of silica sol and H2PtCl4 solution dropwise under stirring state. After the dropwise addition, the beaker was stirred and heated to 90° C. and kept for 30 min to form a synthetic solution with a molar ratio of amantadine:silicon source:noble metal source:ethylenediamine:water of 47:100:10:400:11240.

[0026] (2) Add the pre-prepared DD3R molecular sieve particles (particle size: 300nm) to the synthesis solution at a mass ratio of 0.5% after ball milling, and place the synthesis solution in a microwave reactor, and under microwave conditions The hydrothermal synthesis was carried out under stirring for 72 hours ...

Embodiment 2

[0030] (1) Crush amantadine into granules and put it into a beaker, add appropriate amount of ethylenediamine and water, and use an ultrasonic cell disruptor to sonicate it for 15 minutes, set the frequency to 20kHz, and the power to 900w. After ultrasonic treatment, place the beaker in the ice-water mixture, add the rotor after it cools down, and add appropriate amount of silica sol and H2PtCl4 solution dropwise under stirring state. After the dropwise addition, the beaker was stirred and heated to 90° C. and kept for 30 min to form a synthetic solution with a molar ratio of amantadine:silicon source:noble metal source:ethylenediamine:water of 47:100:10:400:11240.

[0031] (2) Add the pre-prepared DD3R molecular sieve particles (particle size: 300nm) to the synthesis solution at a mass ratio of 0.5% after ball milling, and place the synthesis solution in a microwave reactor, and under microwave conditions The hydrothermal synthesis was carried out under stirring for 72 hours ...

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Abstract

The invention provides a composite material for purifying formaldehyde in airflow, comprising a formaldehyde decomposition material for decomposing formaldehyde and a carbon dioxide adsorption material for absorbing CO2 and / or carbon dioxide produced by decomposition of formaldehyde in airflow ; Wherein, the formaldehyde decomposition material is composed of DD3R molecular sieve and noble metal active components, while the carbon dioxide adsorption material is composed of amino functionalized porous material. In the invention, the formaldehyde gas is preferentially adsorbed and decomposed by selecting a suitable adsorption carrier, and the carbon dioxide adsorption material is assisted to ensure the preferential decomposition of the formaldehyde gas.

Description

technical field [0001] The present application relates to a composite material, in particular to a composite material used for purifying formaldehyde in airflow. Background technique [0002] Newly renovated houses will release harmful substances such as formaldehyde, benzene, toluene, xylene, etc. These harmful substances are particularly harmful to the human body, and long-term exposure will seriously affect human health and even endanger life. Compared with the release period of other types of polluting gases as low as 6 months, the release period of formaldehyde is longer, or as long as 3-15 years. Therefore, after several months of ventilation and deodorization after the house decoration, it is necessary to give priority to the purification of formaldehyde in the room.  Common removal methods for formaldehyde pollutants include physical adsorption (such as activated carbon, molecular sieve, etc.), biological methods, ozone oxidation, plant degradation, and catalytic oxi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/03B01D53/86B01D53/72
CPCB01D53/8668B01J29/0325
Inventor 不公告发明人
Owner 霍宜康上海科技有限公司
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