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Palladium-based catalyst for thermocatalytic formaldehyde degradation

A formaldehyde degradation and catalyst technology, which is applied in the field of thermal catalytic materials and environmental protection, can solve the problems of high temperature calcination, limitation, and high catalyst manufacturing cost, and achieves the effects of mild preparation conditions, improved capacity, and convenient operation.

Active Publication Date: 2019-03-29
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the above prepared Pd / TiO 2 There are certain restrictions, such as the amount of Pd used is relatively large, all of which are 1w.t.% of Pd; in addition, during the preparation process, high-temperature calcination is required
[0005] Although the Pd / TiO2 catalyst prepared by the above method has the performance of catalyzing and decomposing formaldehyde better, it still faces some problems, such as the high content of Pd used, the addition of other additives, and the need for high-temperature calcination during the preparation process. These make the manufacturing cost of the catalyst higher, which will be limited in practical application

Method used

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  • Palladium-based catalyst for thermocatalytic formaldehyde degradation
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Examples

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Effect test

Embodiment 1

[0027] A preparation method of palladium-based catalyst for thermal catalytic degradation of formaldehyde: (1) Take 0.5 g of TiO 2 Placed in a fixed bed reduction reaction tube; (2) At room temperature at a heating rate of 10°C / min, the temperature is increased to 300°C, and hydrogen reduction is carried out at different temperatures for 3 hours, and then hydrogen gas is continued to cool to room temperature naturally; (3) Absorption Add 0.4ml of 10mg / ml palladium nitrate solution into a three-necked flask, then add pure water, and continue to stir; (4) Under stirring, add reduced anatase (TiO 2 ) Solid, stir and react for 1h; (5) Then add 1mol / L NaOH solution dropwise until the pH of the solution is 10; (6) Weigh 0.0071g NaBH 4 Solid, add 10ml pure water to prepare NaBH 4 The solution was added dropwise to the aforementioned solution, and the reaction was continued for 2 hours under stirring; (7) After the reaction was completed, the solution was centrifuged at 8000 rpm for 5 min...

Embodiment 2

[0029] A preparation method of palladium-based catalyst for thermal catalytic degradation of formaldehyde: (1) Take 0.5 g of TiO 2 Placed in a fixed-bed reduction reaction tube; (2) At room temperature at a heating rate of 10°C / min, raise to 400°C, and perform hydrogen reduction at different temperatures for 3 hours, and then continue to pass hydrogen to cool to room temperature naturally; (3) Absorb Add 0.4ml of 10mg / ml palladium nitrate solution into a three-necked flask, then add pure water, and continue to stir; (4) Under stirring, add reduced anatase (TiO 2 ) Solid, stir and react for 1h; (5) Then add 1mol / L NaOH solution dropwise until the pH of the solution is 10; (6) Weigh 0.0071g NaBH 4 Solid, add 10ml pure water to prepare NaBH 4 The solution was added dropwise to the aforementioned solution, and the reaction was continued for 2 hours under stirring; (7) After the reaction was completed, the solution was centrifuged at 8000 rpm for 5 minutes and washed with deionized wat...

Embodiment 3

[0031] A preparation method of palladium-based catalyst for thermal catalytic degradation of formaldehyde: (1) Take 0.5 g of TiO 2 Placed in a fixed-bed reduction reaction tube; (2) At room temperature at a heating rate of 10°C / min, increase to 500°C, and perform hydrogen reduction at different temperatures for 3 hours, and then continue to pass hydrogen to cool to room temperature naturally; (3) Absorb Add 0.2ml of 10mg / ml palladium nitrate solution into the three-necked flask, then add pure water, and continue to stir; (4) Under stirring, add the reduced anatase (TiO 2 ) Solid, stir and react for 1h; (5) Then add 1mol / L NaOH solution dropwise until the pH of the solution is 10; (6) Weigh 0.0071g NaBH 4 Solid, add 10ml pure water to prepare NaBH 4 The solution was added dropwise to the aforementioned solution, and the reaction was continued for 2 hours under stirring; (7) After the reaction was completed, the solution was centrifuged at 8000 rpm for 5 minutes and washed with deio...

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Abstract

The invention discloses a palladium-based catalyst for thermocatalytic formaldehyde degradation. In the Pd / TiO2 catalyst, mass fraction of Pd is 0.1%-0.4%, on the basis of the weight of catalyst being100%. A preparation method comprises the following steps: 1) performing reduction treatment on a TiO2 carrier; 2) adding a defined amount of TiO2 into a palladium nitrate solution; 3) regulating pH of the solution and reducing; 4) drying the acquired mixture, thereby acquiring the required Pd / TiO2 catalyst for formaldehyde oxidation. The preparation method disclosed by the invention is simple; the prepared Pd / TiO2 catalyst has an anatase (ATiO2) phase structure; the formed Pd / TiO2 shows an excellent catalytic performance for formaldehyde oxidation.

Description

Technical field [0001] The invention relates to a palladium-based catalyst for thermally catalyzing the degradation of formaldehyde and a preparation method thereof, belonging to the technical field of thermal catalysis materials and environmental protection. Background technique [0002] Formaldehyde is the most harmful gas in the indoor environment. The design and preparation of highly efficient and stable catalysts to catalyze the oxidation of formaldehyde under mild conditions has always been one of the important research contents in the field of environmental catalysis. However, currently, among the catalysts used in thermocatalytic reactions, non-metal supported catalysts have poor catalytic effect, while precious metal supported catalysts have better effects, but there are high amounts of precious metals, poor dispersion of precious metals, and poor stability. problem. [0003] TiO 2 As a thermal catalyst carrier, it has been extensively studied. For thermal catalytic degr...

Claims

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Application Information

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IPC IPC(8): B01J23/44B01D53/86B01D53/72
CPCB01D53/8668B01J23/44
Inventor 纪红兵王旭裕芮泽宝
Owner SUN YAT SEN UNIV
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