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A kind of platinum-iron alloy catalyst and preparation method thereof and application in vocs catalytic oxidation

A ferroalloy and catalyst technology, which is applied in the field of activated alumina-supported platinum-iron alloy catalysts, can solve the problems of easy deactivation in industrial applications, high cost, high energy consumption, etc., achieve excellent low-temperature VOCs catalytic oxidation performance and reaction stability, and improve stability performance, high catalytic activity

Active Publication Date: 2021-06-22
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Noble metal catalysts exhibit good activity and stability for the catalytic oxidation of VOCs, but their high cost and deactivation characteristics limit their industrial applications
Compared with noble metal oxide catalysts, non-noble metal oxide catalysts are less costly and have some poison resistance, but their efficiency is lower, resulting in higher energy consumption

Method used

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  • A kind of platinum-iron alloy catalyst and preparation method thereof and application in vocs catalytic oxidation
  • A kind of platinum-iron alloy catalyst and preparation method thereof and application in vocs catalytic oxidation
  • A kind of platinum-iron alloy catalyst and preparation method thereof and application in vocs catalytic oxidation

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Put 0.125mmol of platinum acetylacetonate and 0.375mmol of iron acetylacetonate into a beaker filled with 15ml of absolute ethanol, and add the mixed solution dropwise with a syringe to a micro-bench with carbon black (0.05ml cm -2 ), after the absolute ethanol was completely volatilized, it was put into an argon atmosphere glove box for operation. In the glove box, a high-intensity instantaneous current (5A, 55ms) was applied to the micro-test bench with a DC power supply. At this time, bright light appeared, indicating that the experiment was successful and PtFe was obtained. 3 -C type platinum iron alloy catalyst. Then, the above obtained PtFe 3 The catalyst is mixed with activated alumina sol, and tetrahydrofuran (THF) is added dropwise under magnetic stirring for demulsification, so that the PtFe 3 The catalyst was deposited on the surface of activated alumina, centrifuged at 10,000 rpm for 15 minutes, and then vacuum-dried at 50° C. for 12 hours to obtain the fi...

Embodiment 2

[0043] Put 0.125mmol of platinum acetylacetonate and 0.25mmol of iron acetylacetonate into a beaker containing 15ml of absolute ethanol, and add the mixed solution dropwise with a syringe to a micro-bench with carbon black (0.05ml cm -2 ), after the absolute ethanol was completely volatilized, it was put into an argon atmosphere glove box for operation. In the glove box, a high-intensity instantaneous current (5A, 55ms) was applied to the micro-test bench with a DC power supply. At this time, bright light appeared, indicating that the experiment was successful and PtFe was obtained. 2 type platinum iron alloy catalyst. Then, the above obtained PtFe 2 The catalyst is mixed with activated alumina sol, and tetrahydrofuran (THF) is added dropwise under magnetic stirring for demulsification, so that the PtFe 2 The catalyst was deposited on the surface of activated alumina, centrifuged at 10,000 rpm for 15 minutes, and then vacuum-dried at 50° C. for 12 hours to obtain the final c...

Embodiment 3

[0046] Put 0.25mmol of platinum acetylacetonate and 0.25mmol of iron acetylacetonate into a beaker containing 20ml of absolute ethanol, and add the mixed solution dropwise with a syringe to a micro-bench with carbon black (0.05ml cm -2 ), after the absolute ethanol was completely volatilized, it was put into an argon atmosphere glove box for operation. In the glove box, a high-intensity instantaneous current (5A, 55ms) was applied to the micro-test bench with a DC power supply. At this time, bright light appeared, indicating that the experiment was successful, and a PtFe-type platinum-iron alloy catalyst was prepared. Then, mix the PtFe catalyst obtained above with activated alumina sol, add tetrahydrofuran (THF) dropwise under magnetic stirring for demulsification, deposit the PtFe catalyst on the surface of activated alumina, centrifuge at 10000rpm for 15min, and then The final catalyst was obtained after vacuum drying for 12 h.

[0047] The VOCs catalytic oxidation activit...

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Abstract

The invention discloses a platinum-iron alloy catalyst, a preparation method thereof and an application in catalytic oxidation of VOCs. The platinum-iron alloy catalyst is composed of platinum-iron alloy nanoparticles dispersed and supported on the surface of active aluminum oxide. Its preparation method is to mix the platinum source and the iron source by the liquid phase method, add it to the surface of the carbonaceous reducing agent, and volatilize and remove the solvent. In a protective atmosphere, apply an ultrashort current pulse to the precursor mixture for reduction reaction, and quickly quench to room temperature after the reduction reaction is completed to obtain platinum-iron alloy nanoparticles; after mixing platinum-iron alloy nanoparticles with activated alumina sol, demulsification and precipitation, Centrifuge and dry in vacuum. The catalyst has a high proportion of iron and platinum, low cost, and is used for the catalytic oxidation of VOCs. It also has the characteristics of high low-temperature catalytic activity and good long-term use stability.

Description

technical field [0001] The present invention relates to a catalytic material, in particular to a platinum-iron alloy catalyst, in particular to an active alumina-supported platinum-iron alloy catalyst, and to a method for preparing a platinum-iron alloy catalyst by a carbothermal reduction shock method and a platinum-iron alloy catalyst in VOCs The application in catalytic oxidation belongs to the technical field of catalysis. Background technique [0002] Volatile organic compounds (VOCs) refer to a class of compounds that are ubiquitous in the atmosphere and have polluting properties. They generally refer to compounds with high saturated vapor pressure, low boiling point, small molecular weight, and volatile at room temperature under normal atmospheric pressure conditions. organic compounds. Volatile organic compounds are further classified according to their chemical structure, and can be roughly divided into eight categories: alkanes, aromatics, alkenes, halocarbons, es...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89B01D53/86B01D53/72
CPCB01D53/8668B01J23/8906
Inventor 李立清杜衍坤曾政
Owner CENT SOUTH UNIV