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Manganese oxide precious metal compound type catalyst, preparation method and application thereof

A technology of manganese oxides and precious metals, which is applied in the field of preparation, manganese oxides and precious metal composite catalysts, and achieves the effects of low price, simple operation, good market application value and promotion prospect

Active Publication Date: 2019-02-12
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a manganese oxide noble metal composite catalyst, a preparation method and its application, which solves the technical problem that the prior art cannot effectively reduce the amount of noble metal while maintaining the catalyst's superior low-temperature purification activity of VOCs

Method used

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  • Manganese oxide precious metal compound type catalyst, preparation method and application thereof
  • Manganese oxide precious metal compound type catalyst, preparation method and application thereof
  • Manganese oxide precious metal compound type catalyst, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Immerse 0.37g of 5×5×24mm honeycomb ceramic regular substrate in 10g / L stannous chloride solution at room temperature for 10min, then in 0.03g / L palladium chloride solution for 10min at room temperature, then take out the water Rinse it clean; put the pretreated regular substrate into the manganese oxide precursor solution (prepared from 0.10mol / L potassium permanganate, 0.1mol / L acetic acid and water), and transfer it into the hydrothermal reaction kettle together , continue the reaction at 100°C for 20h; put the structured substrate after the hydrothermal reaction into the palladium precursor solution (made of 0.02g / L palladium chloride, 5.0g / L sodium hypophosphite, 13.5g / L ammonium chloride, 100mL / L of 25% ammonia and water), reacted continuously at 60°C water bath temperature for 3h, finally took it out and rinsed with water, and dried at 120°C to constant weight.

Embodiment 2

[0040] Dip 0.37g honeycomb ceramic regular substrate with a size of 5×5×24mm in 8g / L stannous chloride solution at room temperature for 15min, then in 0.02 / L palladium chloride solution at room temperature for 15min, then take out the water Rinse it clean; put the pretreated regular substrate into the manganese oxide precursor solution (prepared from 0.05mol / L potassium permanganate and water), and transfer them together into a hydrothermal reactor for continuous reaction at 90°C 24h; put the regular substrate after the hydrothermal reaction into the palladium precursor solution (25% ammonia water by 0.04g / L palladium chloride, 5.0g / L sodium hypophosphite, 13.5g / L ammonium chloride, 100mL / L and water), the reaction was continued at 80°C for 2 hours in a water bath, and finally it was taken out and rinsed with water, then dried at 120°C to constant weight.

Embodiment 3

[0042] Dip 0.37g honeycomb ceramic regular substrate with the size of 5×5×24mm in 12g / L stannous chloride solution at room temperature for 5min, then in 0.05 / L palladium chloride solution at room temperature for 5min, then take out the water Rinse well; put the pretreated regular substrate into the manganese oxide precursor solution (prepared from 0.15mol / L potassium permanganate, 0.3mol / L acetic acid and water), and transfer them into the hydrothermal reaction kettle together , continued the reaction at 120°C for 12h; put the structured substrate after the hydrothermal reaction into the palladium precursor solution (made of 0.03g / L palladium chloride, 5.0g / L sodium hypophosphite, 13.5g / L ammonium chloride, 100mL / L of 25% ammonia water and water), the reaction was continued at 50°C water bath temperature for 4h, and finally it was taken out and rinsed with water, and dried at 120°C to constant weight.

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Abstract

The invention belongs to the field of air purification and relates to a manganese oxide precious metal compound type catalyst, a preparation method and application thereof. The preparation method of the manganese oxide precious metal compound type catalyst disclosed by the invention comprises the following steps: step 1, dipping a precious metal catalyst carrier in a stannous chloride solution atfirst and then dipping the precious metal catalyst carrier in a palladium chloride solution; step 2, putting the precious metal catalyst carrier obtained in the step 1 into a manganese oxide precursorsolution to perform hydrothermal reaction; step 3, putting the precious metal catalyst carrier into a palladium precursor solution to subjected to water bath heating and drying after the hydrothermalreaction, wherein the manganese oxide precursor solution comprises potassium permanganate, and the palladium precursor solution comprises a palladium chloride solution. The invention further providesthe manganese oxide precious metal compound type catalyst and application thereof. By means of the manganese oxide precious metal compound type catalyst, the preparation method and the application thereof disclosed by the invention, the technical problem that excellent VOCs low-temperature purification activity of the catalyst cannot be kept while the precious metal use amount is effectively reduced in the prior art are solved.

Description

technical field [0001] The invention belongs to the field of air purification, and relates to a manganese oxide noble metal composite catalyst, a preparation method and an application thereof. Background technique [0002] In the effective treatment of volatile organic compounds (VOCs), the catalytic oxidation combustion method has attracted much attention, which has the advantages of a wide range of VOCs types, fast purification rate and high treatment efficiency, and the final product is CO 2 And water, will not cause secondary pollution. The core of this method is the catalyst, and the honeycomb monolithic combustion catalyst is currently the most widely used due to its characteristics of pressure drop, large processing capacity, and high mechanical and thermal stability. Monolithic catalysts are mainly divided into noble metal monolithic catalysts and non-precious metal monolithic catalysts according to the type of active components. Noble metal monolithic catalysts ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/656F23G7/07
CPCB01J23/002B01J23/6562B01J2523/00F23G7/07F23G2209/14B01J2523/43B01J2523/72B01J2523/824Y02A50/20
Inventor 李永峰刘芳芳许泽华程高周俊丽
Owner GUANGDONG UNIV OF TECH
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