Preparation method of zirconium dioxide-based platinum oxide catalyst with core-shell structure

A zirconium dioxide and platinum oxide-based technology, which is applied in metal/metal oxide/metal hydroxide catalysts, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve the problems of short service life and low catalytic activity , to achieve the effect of improving service life and catalytic efficiency

Active Publication Date: 2021-06-01
陕西瑞科新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing a zirconia-based platinum oxide catalyst with a core-shell structure, which solves the problem of low catalytic activity of existing platinum oxide catalysts and the use of The problem of short life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A method for preparing a zirconia-based platinum oxide catalyst with a core-shell structure of the present invention is specifically implemented according to the following steps:

[0044] Step 1, adding zirconium chloride to absolute ethanol and stirring evenly, then adding ethyl cellulose for ultrasonic dispersion to obtain a dispersed zirconium liquid;

[0045] The concentration of zirconium chloride in absolute ethanol is 100g / L, the stirring speed is 1000r / min, and the addition of ethyl cellulose is 20% of the quality of zirconium chloride;

[0046] The ultrasonic dispersion time is 20min, the ultrasonic dispersion temperature is 30°C, and the ultrasonic frequency is 60kHz;

[0047] Step 2, the dispersed zirconium liquid is distilled under reduced pressure to form a viscous slurry, and then added to a mold for constant temperature extrusion granulation to form prefabricated granules;

[0048] The temperature of the vacuum distillation is 80°C, the time of the vacuu...

Embodiment 2

[0058] A method for preparing a zirconia-based platinum oxide catalyst with a core-shell structure of the present invention is specifically implemented according to the following steps:

[0059] Step 1, adding zirconium chloride to absolute ethanol and stirring evenly, then adding ethyl cellulose for ultrasonic dispersion to obtain a dispersed zirconium liquid;

[0060] The concentration of zirconium chloride in absolute ethanol is 120g / L, and the stirring speed is 1100r / min, and the addition of ethyl cellulose is 25% of the quality of zirconium chloride;

[0061] The time of ultrasonic dispersion is 30min, the temperature of ultrasonic dispersion is 40°C, and the ultrasonic frequency is 70kHz;

[0062] Step 2, the dispersed zirconium liquid is distilled under reduced pressure to form a viscous slurry, and then added to a mold for constant temperature extrusion granulation to form prefabricated granules;

[0063] The temperature of vacuum distillation is 90°C, the time of vac...

Embodiment 3

[0073] A method for preparing a zirconia-based platinum oxide catalyst with a core-shell structure of the present invention is specifically implemented according to the following steps:

[0074] Step 1, adding zirconium chloride to absolute ethanol and stirring evenly, then adding ethyl cellulose for ultrasonic dispersion to obtain a dispersed zirconium liquid;

[0075] The concentration of zirconium chloride in absolute ethanol is 180g / L, and the stirring speed is 1500r / min, and the addition of ethyl cellulose is 30% of the quality of zirconium chloride;

[0076] The ultrasonic dispersion time is 30min, the ultrasonic dispersion temperature is 45°C, and the ultrasonic frequency is 80kHz;

[0077] Step 2, the dispersed zirconium liquid is distilled under reduced pressure to form a viscous slurry, and then added to a mold for constant temperature extrusion granulation to form prefabricated granules;

[0078] The temperature of vacuum distillation is 90 ℃, the time of vacuum di...

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Abstract

The invention discloses a preparation method of a zirconium dioxide-based platinum oxide catalyst with a core-shell structure, which specifically comprises the following steps of: firstly, adding zirconium chloride into absolute ethyl alcohol, adding ethyl cellulose, carrying out ultrasonic dispersion and reduced pressure distillation to form viscous slurry, and adding the viscous slurry into a mold to form prefabricated particles; adding ethyl cellulose into absolute ethyl alcohol, and carrying out ultrasonic dispersion; spraying the obtained solution into the prefabricated particles, and carrying out constant-temperature standing reaction to obtain first coated particles; adding platinum chloride into distilled water, spraying the obtained solution on the first coated particles, standing at constant temperature for reaction, and repeating spraying-constant temperature standing for several times to obtain second coated particles; and finally, putting the second coated particles into a reaction kettle for reaction to obtain a prefabricated catalyst, and performing constant-temperature illumination reaction to obtain the zirconium dioxide-based platinum oxide catalyst. The zirconium dioxide-based platinum oxide catalyst with the shell-core structure prepared by the method can reflect external light to the inner surface of the catalyst, so that the catalytic efficiency is effectively improved, and the service life can be greatly prolonged.

Description

technical field [0001] The invention belongs to the technical field of catalytic preparation, and in particular relates to a preparation method of a zirconium dioxide-based platinum oxide catalyst with a core-shell structure. Background technique [0002] Zirconium dioxide has high thermal stability, good mechanical strength, and strong interaction with supported metals. It can be used as an excellent catalyst carrier and is widely used in heterogeneous catalytic reactions. The increase of its surface area is beneficial to improve the dispersion of the loaded metal active components, generate more reactive sites, and then improve the reactivity. On the basis of high specific surface area, ZrO 2 Realizing the functionalization of morphology and structure can further enhance its application value. [0003] Jin et al. disclosed a hollow spherical mesoporous ZrO with nanocube Pd inside. 2 Catalyst, ZrO 2 The mesoporous structure on the shell greatly strengthens the diffusion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42B01J37/34
CPCB01J23/42B01J23/002B01J37/345
Inventor 蔡万煜史晓妮李晓龙白敏刚
Owner 陕西瑞科新材料股份有限公司
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