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Catalyst for catalytic elimination of carbon monoxide and formaldehyde under normal temperature and humidity conditions and preparation method thereof

A carbon monoxide and catalyst technology, which is applied to the catalyst for catalyzing the elimination of carbon monoxide and formaldehyde and the field of preparation thereof, can solve problems such as unfavorable long-term storage and use, unfavorable large-scale promotion of catalysts, poor catalyst stability, etc., and achieves high utilization rate and high stability of precious metals. The effect of stability, high activity and stability

Active Publication Date: 2019-03-22
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are some reports about the elimination of formaldehyde by room temperature oxidation, such as patent No. ZL200410047973.7, ZL200710121423.9, ZL200410102873.3, etc., but the catalysts reported above also have the disadvantages of poor stability, which is not conducive to long-term storage and use, and is not conducive to the commercialization of catalysts. large-scale promotion

Method used

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  • Catalyst for catalytic elimination of carbon monoxide and formaldehyde under normal temperature and humidity conditions and preparation method thereof
  • Catalyst for catalytic elimination of carbon monoxide and formaldehyde under normal temperature and humidity conditions and preparation method thereof
  • Catalyst for catalytic elimination of carbon monoxide and formaldehyde under normal temperature and humidity conditions and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: prepare Pt colloid

[0036] 0.0736g chloroplatinic acid (0.0453gPt(NO 3 ) 2 or 0.0559gPt(C 5 h 7 o 2 ) 2 ) was dissolved in 10 mL of ethylene glycol, the pH of the reaction system was adjusted to 12 with sodium hydroxide in ethylene glycol (1.25 mol / L), stirred at room temperature for 0.5 h, and then treated at 140° C. for 0.5 h to obtain 15 mL of Pt colloid. The ratio of each component can be adjusted according to the demand of Pt colloid.

Embodiment 2

[0037] Embodiment 2: Preparation of Pt / NiFe with a mass content of platinum of 0.1% to 5% 2 o 4 catalyst

[0038] Solid phase synthesis method: get a kind of (0.02mol) in nickel nitrate, nickel sulfate, nickel acetate and nickel chloride, ferric nitrate (0.04mol), sodium chloride (0.16mol) and sodium hydroxide (0.20mol), Grind in a mortar for 0.5h, roast in a muffle furnace at 700°C for 3h, wash with distilled water to remove excess ions after cooling down to room temperature, and bake at 100°C for 12h to obtain 4.7g of nickel ferrite carrier with an additive content of 0.10%. The ratio of each component can be adjusted according to the demand of the carrier.

[0039] Add the obtained nickel ferrite carrier to the Pt colloid in Example 1, then add the same volume of deionized water as the colloid, stir at room temperature for 2 hours, put it in an oil bath at 85°C for 12 hours, then filter the above mixture, deionize Wash with water until there are no other ions, and dry at...

Embodiment 3

[0044] Example 3: Nickel ferrite-supported platinum catalyst prepared by different methods

[0045] Solid phase synthesis method: get a kind of (0.02mol) in nickel nitrate, nickel sulfate, nickel acetate and nickel chloride, ferric nitrate (0.04mol), sodium chloride (0.16mol) and sodium hydroxide (0.20mol), Grind in a mortar for 0.5h, bake in a muffle furnace at 700°C for 3h, wash with distilled water to remove excess ions after cooling down to room temperature, and bake at 100°C for 12h to obtain 4.7g of nickel ferrite carrier. The ratio of each component can be adjusted according to the demand of the carrier.

[0046] Citric acid method: Dissolve one of nickel nitrate, nickel sulfate, nickel acetate and nickel chloride (0.02mol), ferric nitrate (0.04mol) in 20mL of water, add 5.6g of citric acid and sodium chloride (0.36mol) , dissolved and then heated to form a gel. The gel was burned in a muffle furnace at 700°C for 3h, washed with distilled water to remove excess ions af...

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Abstract

The invention provides a catalyst for catalytic removal of carbon monoxide and formaldehyde under conditions of ambient temperature and humidity, and belongs to the technical field of catalyst for harmful gas. The catalyst is a supported noble metal catalyst formed by depositing an active component of noble metal on a spinel-structure oxide support containing an aid, wherein the spinel-structure oxide support is one or two of magnesium ferrite, calcium ferrite, strontium ferrite, barium ferrite, cobalt ferrite, nickel ferrite, copper ferrite, zinc ferrite and manganous ferrite; the active component of noble metal is elemental platinum or platinum oxide, and the aid is an oxide of sodium. The catalyst can catalyze carbon monoxide and formaldehyde for complete oxidation under the conditions of ambient temperature and humidity, and products only comprise carbon dioxide and water. The catalyst has higher stability, the activity cannot be reduced after the catalyst is stored for a long time, and the catalyst is not required to be reduced before use; the catalyst has the advantages of being easy to prepare, good in product repeatability, convenient to store and transport and the like and has quite good application prospect.

Description

technical field [0001] The invention belongs to the technical field of harmful gas catalysts, and in particular relates to a catalyst for catalytically eliminating carbon monoxide and formaldehyde under normal temperature and normal humidity conditions and a preparation method thereof. The catalyst can completely catalyze the oxidation of CO and formaldehyde under normal temperature and humidity conditions, and the products are only carbon dioxide and water. Background technique [0002] For a long time, the catalytic oxidation of CO and formaldehyde at room temperature has been a research hotspot, and the problem of air pollution is increasing day by day, which has caused great harm to the environment and human health. Among them, CO and formaldehyde are one of the most serious pollutants in indoor air. [0003] CO is a colorless and odorless gas, so it is extremely difficult to be observed by people. After CO is inhaled into the lungs by the human body, it diffuses into t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/58B01J23/89B01D53/86B01D53/62B01D53/72
CPCB01D53/864B01D53/8668B01D2258/06B01J23/005B01J23/58B01J23/8946B01J23/8953B01J23/8986Y02A50/20
Inventor 张文祥郑彬刘钢
Owner JILIN UNIV
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