CN107737524B - Air purification module for removing formaldehyde in indoor air pollutants and preparation method and application thereof - Google Patents
Air purification module for removing formaldehyde in indoor air pollutants and preparation method and application thereof Download PDFInfo
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- CN107737524B CN107737524B CN201710999157.3A CN201710999157A CN107737524B CN 107737524 B CN107737524 B CN 107737524B CN 201710999157 A CN201710999157 A CN 201710999157A CN 107737524 B CN107737524 B CN 107737524B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/202—Alkali metals
- B01D2255/2022—Potassium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/2073—Manganese
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/209—Other metals
- B01D2255/2092—Aluminium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/06—Polluted air
Abstract
The invention relates to an air purification module for removing formaldehyde in indoor air pollutants, and a preparation method and application thereof. The air purification module provided by the invention has the advantages of simple preparation method, low cost, no secondary pollution and high practical value. The air purification module is suitable for various air purifiers, and can be applied to formaldehyde purification treatment in various places, such as offices, office buildings, living rooms, markets, hospitals, hotels, particularly places such as new-style household residences.
Description
Technical Field
The invention relates to an air purification module for removing formaldehyde from indoor air pollutants, a preparation method and application thereof, relates to the preparation of the air purification module for removing formaldehyde at normal temperature, and relates to the technical field of adsorption catalysis and air pollution treatment. The air purification module is suitable for various air purifiers, and can be applied to formaldehyde purification treatment in various places, such as offices, office buildings, living rooms, markets, hospitals, hotels, particularly places such as new-style household residences.
Background
With the continuous improvement of the living standard of human beings, indoor decoration and decoration become more popular and frequent, indoor air pollution becomes more common, and indoor air pollutants also attract the general attention of people. Among them, formaldehyde is one of the most common and most toxic pollutants in interior decoration. Formaldehyde in indoor air pollutants is mainly derived from furniture, wooden panels and fillers, fabrics, coatings, wallpaper, carpets and even curtains. The formaldehyde content of the house which is newly decorated can exceed 6 times, and the formaldehyde content of the house which is newly decorated can exceed 40 times respectively. The measured data show that the release period of the indoor formaldehyde generally lasts for 3 to 15 years under the condition of normal decoration. Formaldehyde has been identified by the world health organization as a carcinogenic and teratogenic substance, a recognized source of allergy, and also one of the potentially strong mutagens, and studies have shown that: formaldehyde has strong carcinogenic and carcinogenic effects. Formaldehyde threatens the living environment on which human beings live, so how to effectively remove formaldehyde in indoor air pollutants is a concern for all people.
At present, aiming at formaldehyde in indoor air pollutants, the method mainly adopts the mode of controlling release from the source and adopting air purification equipment to purify. The method mainly selects environment-friendly materials to control the formaldehyde release from the source, and mainly adopts a ventilation and air purifier to treat the released or continuously released formaldehyde. Due to the long potential release period of formaldehyde, the problem of formaldehyde pollution still exists after a new house is usually reserved. In recent years, therefore, air cleaning apparatuses have become more and more popular. The air purification module for removing formaldehyde has higher and higher demand, and higher requirements are provided for the formaldehyde removal technology. The mainstream technology adopted at present is activated carbon adsorption, wherein a few companies adopt a photocatalyst (such as gold), an activated carbon supported Pt catalyst (such as Sudoku) and a nano mineral crystal adsorption material (such as SKG). The activated carbon adsorbent has the problems of adsorption saturation and secondary pollution, and cannot fundamentally solve the formaldehyde pollution. How to convert formaldehyde into non-toxic carbon dioxide and water at room temperature is an urgent technology.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to: an air purification module for removing formaldehyde from indoor air pollutants is provided.
Yet another object of the present invention is to: a preparation method of the air purification module is provided.
Yet another object of the present invention is to: applications of the above air purification module are provided.
The purpose of the invention is realized by the following scheme: an air purification module for removing formaldehyde from indoor air pollutants comprises a module cavity and a catalyst filled in the cavity to remove formaldehyde, wherein the catalyst filled in the cavity is prepared by using a porous active alumina or cordierite carrier as a catalyst carrier, using potassium permanganate treated by acid with a certain concentration as an active component and using manganese chloride as a cocatalyst through an impregnation method, the acid with a certain concentration is perchloric acid or sulfuric acid with a molar concentration of 0.5-2.0 mol/L, the load capacity of the potassium permanganate in the catalyst accounts for 2.37-4.74% of the weight of the carrier, and the load capacity of the manganese chloride accounts for 0.15-0.45% of the weight of the carrier; the loading amount of the catalyst in the module is 400-500 g, the loading thickness is 1-2 cm, and the loading volume is 0.8-1L.
The core part of the air purification module is that formaldehyde filled in the cavity is removed with a catalyst, the catalyst preferentially soaks a small amount of manganese chloride into the pore canal of the carrier, and the potassium permanganate treated by acid is continuously soaked into the pore canal of the carrier after being dried. The acid-treated potassium permanganate is used as an active component, so that the oxidability of the potassium permanganate is greatly enhanced. Before the acidic potassium permanganate is impregnated, a small amount of manganese chloride is impregnated in a carrier pore channel, so that a buffer of water is formed in the using process of the catalyst, the catalyst can keep a good removing effect under the wet and dry conditions, and the method is suitable for various environments. The catalyst is filled in a cavity consisting of a honeycomb plate and black mesh cloth or non-woven cloth adhered to the front surface and the rear surface of the honeycomb plate to obtain the air purification module for removing formaldehyde. The module can achieve high effect on removing formaldehyde in air in dry and humid weather.
The invention provides a preparation method of an air purification module for removing formaldehyde in indoor air pollutants, which comprises the following steps:
the first step is as follows: carrying out ultrasonic cleaning on a porous active alumina or cordierite honeycomb carrier, and drying in an oven at 100 ℃, wherein the porous active alumina is a small ball, and the cordierite is a ball or honeycomb;
the second step is that: preparing 0.02-0.06 mol/L manganese chloride solution;
the third step: weighing a certain mass of the carrier in the first step, soaking the carrier in the manganese chloride solution for 6-8 h, and drying the carrier overnight at 60 ℃, wherein the mass fraction of manganese chloride is 0.15-0.45% of the weight of the carrier;
the fourth step: weighing potassium permanganate with a certain mass, and preparing a potassium permanganate solution with the molar concentration of 0.25-0.5 mol/L;
the fifth step: measuring a certain volume of 70% perchloric acid or concentrated sulfuric acid in a certain volume of the potassium permanganate solution, and preparing 0.5-2 mol/L potassium permanganate solution acidified by perchloric acid or sulfuric acid based on the volume of deionized water;
and a sixth step: stirring the mixed solution at room temperature for 1-3 h;
the seventh step: weighing a certain mass of the carrier treated by the manganese chloride prepared in the third step, soaking the certain mass of the carrier in a certain volume of the acidic potassium permanganate solution prepared in the fifth step by adopting an impregnation method, standing for 6-8 h, and drying at 60 ℃ overnight, wherein the load of potassium permanganate accounts for 2.37% -4.74% of the weight of the carrier;
eighth step: weighing a certain mass of the catalyst and filling the catalyst into a module cavity with a certain size, wherein the filling amount of the catalyst is 400-500 g, the filling thickness is 1-2 cm, and the filling volume is 0.8-1L.
The invention provides an application of an air purification module in removing formaldehyde in indoor air pollutants.
The invention provides an air purification module for removing formaldehyde in indoor air pollutants and a preparation method thereof. Manganese chloride is soaked into a carrier pore passage as a cocatalyst before potassium permanganate is treated by soaking acid, the air purification module can generate potassium chloride when meeting water in the use process, and the potassium chloride has high hygroscopicity, so that the air purification module can be used as a buffering agent of water and timely participates in reaction to generate active component manganese oxide under different humidity conditions, and the air purification module can keep a good purification effect under dry and humid air environments. Compared with the existing air purification module on the market, the air purification module has the advantages of simple preparation method, low cost, no secondary pollution, relatively high purification efficiency and very high practical value.
Compared with the prior art on the market, the air purification module and the preparation method thereof have the characteristics that: (1) the catalyst in the air purification module of the invention introduces the design of a buffering agent of water in the design process, so that the air purification module can still keep a better effect under different humidity conditions (2) the invention adopts acid with a certain concentration to treat potassium permanganate, thereby greatly improving the purification efficiency (3) the air purification module of the invention has the advantages of simple preparation method, low cost, no secondary pollution and high practical value.
Detailed Description
Example 1
Weighing 0.97g of manganese chloride dihydrate, and dissolving in 300ml of deionized water to prepare 0.02mol/L manganese chloride solution; weighing 500g of active alumina globules subjected to ultrasonic cleaning and drying, soaking in the manganese chloride solution, standing at room temperature for 6-8 h, and drying at 60 ℃ overnight to obtain the manganese chloride modified active alumina globules.
23.71g of potassium permanganate is weighed and dissolved in 300ml of deionized water to prepare a 0.50mol/L potassium permanganate solution, 36.5ml of concentrated sulfuric acid is added into the solution, and the obtained mixed solution is stirred for 3 hours at room temperature. Weighing 500g of the prepared manganese chloride modified activated alumina pellet, stirring the acidic potassium permanganate solution by using a glass rod while adding the pellet, fully and uniformly soaking, standing at room temperature for 6-8 h, and drying at 60 ℃ overnight. Weighing 500g of the prepared catalyst, and filling the catalyst into a cavity of 27cm x 33cm x 1cm to obtain the air purification module, wherein the cavity is made of a honeycomb plate with black mesh cloth adhered to two sides and is marked as No. 1.
Example 2
Weighing 2.91 manganese chloride dihydrate and dissolving in 300ml of deionized water to prepare 0.06mol/L manganese chloride solution; weighing 500g of active alumina globules subjected to ultrasonic cleaning and drying, soaking in the manganese chloride solution, standing at room temperature for 6-8 h, and drying at 60 ℃ overnight to obtain the manganese chloride modified active alumina globules.
23.71g of potassium permanganate is weighed and dissolved in 300ml of deionized water to prepare a 0.50mol/L potassium permanganate solution, 17.2ml of concentrated sulfuric acid is added into the solution, and the obtained mixed solution is stirred for 3 hours at room temperature. Weighing 500g of the prepared manganese chloride modified activated alumina pellet, stirring the acidic potassium permanganate solution by using a glass rod while adding the pellet, fully and uniformly soaking, standing at room temperature for 6-8 h, and drying at 60 ℃ overnight. Weighing 500g of the prepared catalyst, and filling the catalyst into a cavity of 27cm x 33cm x 1cm to obtain the air purification module, wherein the cavity is made of a honeycomb plate with black mesh cloth adhered to two sides and is marked as No. 2.
Example 3
Weighing 2.91g of manganese chloride dihydrate, and dissolving the manganese chloride dihydrate in 300ml of deionized water to prepare 0.06mol/L manganese chloride solution; weighing 500g of active alumina globules subjected to ultrasonic cleaning and drying, soaking in the manganese chloride solution, standing at room temperature for 6-8 h, and drying at 60 ℃ overnight to obtain the manganese chloride modified active alumina globules.
23.71g of potassium permanganate is weighed and dissolved in 300ml of deionized water to prepare a 0.50mol/L potassium permanganate solution, 8.4ml of concentrated sulfuric acid is added into the solution, and the obtained mixed solution is stirred for 3 hours at room temperature. Weighing 500g of the manganese chloride modified activated alumina spheres prepared in the step 1, adding the spheres while stirring the acidic potassium permanganate solution with a glass rod, standing for 6-8 h at room temperature after fully and uniformly soaking, and drying at 60 ℃ overnight. Weighing 500g of the prepared catalyst, and filling the catalyst into a cavity of 27cm x 33cm x 1cm to obtain the air purification module, wherein the cavity is made of a honeycomb plate with black mesh cloth adhered to two sides and is marked as No. 3.
Example 4
Weighing 2.91g of manganese chloride dihydrate, and dissolving the manganese chloride dihydrate in 300ml of deionized water to prepare 0.06mol/L manganese chloride solution; weighing 500g of honeycomb cordierite subjected to ultrasonic cleaning and drying, soaking the honeycomb cordierite into the manganese chloride solution, standing the mixture at room temperature for 6-8 hours, and drying the mixture overnight at 50-70 ℃ to obtain the manganese chloride modified honeycomb cordierite.
23.71g of potassium permanganate is weighed and dissolved in 300ml of deionized water to prepare a 0.50mol/L potassium permanganate solution, 25.6ml of perchloric acid is added into the solution, and the obtained mixed solution is stirred for 1 hour at room temperature. Weighing 500g of the manganese chloride modified honeycomb cordierite prepared in the step 1, stirring an acidic potassium permanganate solution by using a glass rod, adding the small ball into the acidic potassium permanganate solution, fully and uniformly soaking, standing for 6-8 h, and drying overnight at 50-70 ℃. Weighing 500g of the prepared catalyst, and filling the catalyst into a cavity of 27cm x 33cm x 1cm to obtain the air purification module, wherein the cavity is made of a honeycomb plate with air-permeable non-woven fabrics adhered to two sides and is marked as No. 4.
Example 5
Weighing 1.94g of manganese chloride dihydrate, and dissolving the manganese chloride dihydrate in 300ml of deionized water to prepare 0.04mol/L manganese chloride solution; weighing 500g of cordierite spheres subjected to ultrasonic cleaning and drying, soaking the cordierite spheres in the manganese chloride solution, standing for 6-8 h at room temperature, and drying overnight at 50-70 ℃ to obtain manganese chloride modified cordierite spheres.
11.85g of potassium permanganate is weighed and dissolved in 300ml of deionized water to prepare a 0.25mol/L potassium permanganate solution, 12.3ml of perchloric acid is added into the solution, and the obtained mixed solution is stirred for 2 hours at room temperature. Weighing 500g of the manganese chloride modified cordierite spheres prepared in the step 1, stirring an acidic potassium permanganate solution with a glass rod while adding the spheres, fully and uniformly soaking, standing for 6-8 h, and drying at 50-70 ℃ overnight. 400g of the prepared catalyst is weighed and filled in a cavity of 27cm x 16.5cm x 2cm to obtain the air purification module, and the cavity is made of a honeycomb plate with air-permeable non-woven fabrics adhered to two sides and is marked as No. 5.
Method for evaluating purification efficiency of formaldehyde removal air purification module
Refer to the test method described in GB/T1801-2015.
The results in table 1 show that the air purification module prepared by the method has a good effect on removing formaldehyde in air, and the air purification module disclosed by the invention has the advantages of simple preparation method, low cost, no secondary pollution and high practical value.
Claims (2)
1. The air purification module for removing formaldehyde from indoor air pollutants is characterized by comprising a module cavity and a catalyst filled in the cavity and used for removing formaldehyde, wherein the catalyst filled in the cavity is prepared by taking a porous active alumina or cordierite carrier as a catalyst carrier, taking perchloric acid or sulfuric acid-treated potassium permanganate as an active component with a molar concentration of 0.5-2.0 mol/L and manganese chloride as a cocatalyst by adopting an impregnation method, wherein the loading amount of potassium permanganate in the catalyst accounts for 2.37-4.74% of the weight of the carrier, and the loading amount of manganese chloride accounts for 0.15-0.45% of the weight of the carrier; the loading amount of the catalyst in the module is 400-500 g, the loading thickness is 1-2 cm, and the loading volume is 0.8-1L;
the air purification module for removing formaldehyde in indoor air pollutants comprises the following preparation steps:
the first step is as follows: carrying out ultrasonic cleaning on a porous active alumina or cordierite honeycomb carrier, and drying in an oven at 100 ℃, wherein the porous active alumina is a small ball, and the cordierite is a ball or honeycomb;
the second step is that: preparing 0.02-0.06 mol/L manganese chloride solution;
the third step: weighing a certain mass of the carrier in the first step, soaking the carrier in the manganese chloride solution for 6-8 h, and drying the carrier overnight at 60 ℃, wherein the mass fraction of manganese chloride is 0.15-0.45% of the weight of the carrier;
the fourth step: weighing potassium permanganate with a certain mass, and preparing a potassium permanganate solution with the molar concentration of 0.25-0.5 mol/L;
the fifth step: measuring a certain volume of 70% perchloric acid or concentrated sulfuric acid in a certain volume of the potassium permanganate solution, and preparing 0.5-2 mol/L potassium permanganate solution acidified by perchloric acid or sulfuric acid based on the volume of deionized water;
and a sixth step: stirring the mixed solution at room temperature for 1-3 h;
the seventh step: weighing a certain mass of the carrier treated by the manganese chloride prepared in the third step, soaking the certain mass of the carrier in a certain volume of the acidic potassium permanganate solution prepared in the fifth step by adopting an impregnation method, standing for 6-8 h, and drying at 60 ℃ overnight, wherein the load of potassium permanganate accounts for 2.37% -4.74% of the weight of the carrier;
eighth step: weighing a certain mass of the catalyst and filling the catalyst into a module cavity with a certain size, wherein the filling amount of the catalyst is 400-500 g, the filling thickness is 1-2 cm, and the filling volume is 0.8-1L.
2. Use of an air purification module according to claim 1 for the removal of formaldehyde from indoor air pollutants.
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| CN201710999157.3A CN107737524B (en) | 2017-10-24 | 2017-10-24 | Air purification module for removing formaldehyde in indoor air pollutants and preparation method and application thereof |
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| CN201710999157.3A CN107737524B (en) | 2017-10-24 | 2017-10-24 | Air purification module for removing formaldehyde in indoor air pollutants and preparation method and application thereof |
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| CN107737524B true CN107737524B (en) | 2021-06-04 |
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| CN109126837A (en) * | 2018-09-30 | 2019-01-04 | 浙江净威环境科技有限公司 | A kind of efficient low concentration purifying indoor formaldehyde catalyst |
| CN113262796B (en) * | 2021-06-07 | 2023-05-26 | 河南省科学院 | Non-noble metal catalyst and method for producing low-carbon alcohol liquid fuel by catalytically reforming biomass synthetic gas by using same |
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| CN102198405B (en) * | 2011-04-01 | 2013-03-06 | 天津工业大学 | Composite catalyst for purifying indoor formaldehyde and preparation method of composite catalyst |
| WO2012167280A1 (en) * | 2011-06-03 | 2012-12-06 | The Regents Of The University Of California | Manganese oxide and activated carbon fibers for removing particle, voc or ozone from a gas |
| CN104857840B (en) * | 2014-02-26 | 2017-09-01 | 绿普达(北京)科技有限公司 | A kind of scavenging material for removing indoor formaldehyde and common peculiar smell and preparation method thereof |
| CN104190251B (en) * | 2014-09-09 | 2017-04-05 | 清华大学 | A kind of material for air purification and its preparation method and application |
| CN104324686A (en) * | 2014-10-17 | 2015-02-04 | 中科润蓝环保技术（北京）有限公司 | Indoor air purifying agent, preparation method thereof, and indoor air purifier filter screen |
| CN106268620B (en) * | 2016-09-21 | 2019-01-25 | 曲阜师范大学 | A kind of preparation method of load-type solid acid formaldehyde eliminating agent |
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