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Normal temperature formaldehyde removal catalysis material

A catalytic material, room temperature technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of low irradiation efficiency, formaldehyde cannot be effectively removed, and low efficiency And other issues

Inactive Publication Date: 2015-07-01
江苏瑞丰科技实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the strong oxidizing properties of the chemicals used, it is easy to cause harm to the human body
Moreover, the efficiency of this method for removing formaldehyde is relatively low, and there are shortcomings such as incomplete oxidation and decomposition of indoor VOC and inability to decompose inorganic pollutants.
[0006] 3) Chemical polycondensation method: This method is only effective for formaldehyde, and is not effective for the removal of other VOCs such as methanol, ethanol, benzene, toluene, etc.
At present, this method is often used as one of the main methods for indoor formaldehyde treatment construction. Due to the spraying method, organic amine or inorganic ammonium reagents have certain irritation and toxicity, and cause more damage than formaldehyde.
[0007] 4) Photocatalytic method: This method generally uses titanium oxide (TiO 2 ) and other semiconductor materials, excited by ultraviolet light, can decompose most of the indoor organic pollutants, but for NH 3 Inorganic pollutants such as powerless
The former has low efficiency in actual use due to the extremely low indoor ultraviolet radiation intensity
The latter generally put ultraviolet lamps in the purifier, which also has problems such as low irradiation efficiency, and ultraviolet light can easily lead to the generation of ozone.
[0008] 5) Biotransformation method: This method uses biological enzymes or microorganisms or plants to achieve the purpose of purifying formaldehyde, but there are problems such as low efficiency
In the actual environment (the water vapor concentration is much higher than the formaldehyde concentration), the carrier preferentially adsorbs water vapor and cannot effectively enrich formaldehyde, resulting in low formaldehyde removal efficiency
5) Part of the catalyst supported by activated carbon is mostly coal-based or wood-based activated carbon, and the specific surface area is generally less than 1000 m 2 / g, the adsorption of formaldehyde is mainly based on physical adsorption. In the actual environment, low-concentration formaldehyde cannot be effectively removed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Measure 625mL of 50wt% manganese nitrate, 5000mL of deionized water, weigh 200g of nickel nitrate powder, 1000g of 3×5mm columnar coconut shell activated carbon with an iodine value of 1000, mix and soak at room temperature for 24 hours, and centrifuge to obtain activated carbon Semi-dry ingredients, at 120 oDry at C for 10 h to obtain dry material. The dry material was immersed in 5000mL aqueous solution containing 2% NaOH and 4% EDTA for the second time, kept at room temperature for 4h, and the activated carbon semi-dry material was obtained after solid-liquid separation by drum centrifugation. o Dry at C for 10h, 450 o C under nitrogen atmosphere roasting 8h in the system.

[0023] Take 500g of formaldehyde-removing catalytic material at room temperature and fill it in the honeycomb panel, and the honeycomb panel is installed in a self-made purifier with an air volume of 300 m 3 / h, wind speed 1.5 m / s, at 30 m 3 National standard purification chamber test, formal...

Embodiment 2

[0025] Measure 625mL of 50wt% manganese nitrate, 5000mL of deionized water, 1000g of 3mm spherical coconut shell activated carbon with an iodine value of 1000, mix and soak at room temperature for 24h, and obtain activated carbon semi-dry material after drum centrifugation. o Dry at C for 10 h to obtain dry material. The dry material was soaked in 5000mL aqueous solution containing 2% NaCl and 3% EDTA disodium salt for the second time, kept at room temperature for 4h, and the activated carbon semi-dry material was obtained after drum centrifugation and solid-liquid separation, and was heated at 120 o Dry at C for 10h, 400 o C under nitrogen atmosphere roasting 8h in the system.

[0026] Take 500g of formaldehyde-removing catalytic material at room temperature and fill it in the honeycomb panel, and the honeycomb panel is installed in a self-made purifier with an air volume of 300 m 3 / h, wind speed 1.5 m / s, at 30 m 3 National standard purification chamber test, formaldehyde...

Embodiment 3

[0028] Measure 625mL of 50wt% manganese nitrate, 5000mL of deionized water, weigh 400g of ferric nitrate hydrate, and 2000g of coconut shell activated carbon with an iodine value of 1000. Activated carbon semi-dry material is obtained after liquid separation, at 120 o Dry at C for 10 h to obtain dry material. The dry material is soaked twice in 5000mL containing 2% KNO 3 And in the aqueous solution of 2% lysine, keep at normal temperature for 4h, obtain activated carbon semi-dry material after solid-liquid separation, at 120 o Dry at C for 10h, 350 o It was obtained by roasting under nitrogen atmosphere for 4h.

[0029] Take 500 g of formaldehyde removal catalytic material at room temperature and assemble it in a self-made purifier with an air volume of 300 m 3 / h, wind speed 1.5 m / s, at 30 m 3 National standard purification chamber test, formaldehyde concentration 1.0 mg / m 3 ~1.2 mg / m 3 , temperature 18~22 o C, Humidity 50%RH~80%RH, see Table 1 for purification effect...

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Abstract

The invention relates to a formula and a corresponding preparation technology of a normal temperature formaldehyde removal catalysis material, and belongs to the technical fields of normal temperature adsorption catalysis and air pollution treatment. The catalysis material is prepared by adopting a one-step co-precipitation process or a step-by-step dipping process to load active components with granular, cylindrical, spherical or honeycomb high-specific surface area shell activated carbon as a carrier, one or more non-noble metal salts as main active components, such as nitrate, sulfate or chloride of manganese, iron, cobalt, nickel, copper, zinc, lanthanum or cerium, one or more alkali metal / alkaline earth metal salts as an inorganic additive, such as oxalate, nitrate, sulfate, acetate, carbonate and bicarbonate of sodium, potassium, magnesium, calcium, and ethylenediamine tetracetic acid / ethylenediamine tetraacetic acid salt, basic amino acid, polyamide monomer and polyurethane monomer as a nitrogen-containing organic additive. The normal temperature formaldehyde removal catalysis material has the characteristics of rapid capture, high efficiency catalytic oxidation and long working cycle, and can meet requirements of long-time effective removal of formaldehyde in indoor real environment.

Description

technical field [0001] The invention relates to a formula of a catalyst material for removing formaldehyde at normal temperature and a corresponding preparation process, belonging to the technical field of adsorption catalysis and air pollution control at normal temperature. It is characterized in that it uses granular, columnar, spherical or honeycomb high specific surface area shell activated carbon as the carrier, one or several non-precious metal salts as the main active component, and one or several alkali metal / alkaline earth metal salts as the inorganic Auxiliaries, and one or several nitrogen-containing organic auxiliaries, are prepared by one-step co-precipitation process or step-by-step impregnation process to load active components. This room temperature formaldehyde removal material has the characteristics of fast capture, efficient catalytic oxidation, long working cycle, etc., and can meet the requirements of long-term (>3000h) effective formaldehyde removal i...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J23/34B01D53/86B01D53/72
Inventor 杜峰
Owner 江苏瑞丰科技实业有限公司
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