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Preparation method of porous zirconium dioxide carrier

A technology of zirconium dioxide and carrier, which is applied in the field of catalytic carrier preparation, can solve the problem that noble metal catalysts cannot play a synergistic effect, and achieve the effect of large specific surface area, self-activation and stable structure

Pending Publication Date: 2021-06-04
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 porous zirconia carrier, which solves the problem that the existing carrier loaded with noble metals cannot play a synergistic role as a catalyst

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0021] A kind of preparation method of porous zirconia carrier of the present invention, specifically implement according to the following steps:

[0022] Step 1, adding zirconium chloride to absolute ethanol, stirring evenly to form a solution; then adding a dispersant to ultrasonically disperse to obtain a dispersion;

[0023] The concentration of zirconium chloride in absolute ethanol is 20-60g / L, the stirring speed is 1000-2000r / min, and the stirring temperature is 20-50°C;

[0024] The amount of dispersant added is 20-25% of the mass of zirconium chloride, the dispersant is a mixture of polyvinylpyrrolidone and ethylcellulose, and the mass ratio of polyvinylpyrrolidone to ethylcellulose is 1:3-6;

[0025] The time of ultrasonic dispersion is 30-60min, the temperature of ultrasonic dispersion is 50-60℃, and the ultrasonic frequency is 60-80kHz;

[0026] Step 2, put the dispersion liquid into the reaction kettle and distill it under reduced pressure to form a viscous liqui...

Embodiment 1

[0033] A kind of preparation method of porous zirconia carrier of the present invention, specifically implement according to the following steps:

[0034] Step 1, adding zirconium chloride to absolute ethanol, stirring evenly to form a solution; then adding a dispersant to ultrasonically disperse to obtain a dispersion;

[0035] The concentration of zirconium chloride in absolute ethanol is 20g / L, the stirring speed is 1000r / min, and the stirring temperature is 20°C;

[0036] The amount of dispersant added is 20% of the mass of zirconium chloride, the dispersant is a mixture of polyvinylpyrrolidone and ethylcellulose, and the mass ratio of polyvinylpyrrolidone to ethylcellulose is 1:3;

[0037] The time of ultrasonic dispersion is 30min, the temperature of ultrasonic dispersion is 50°C, and the ultrasonic frequency is 60kHz;

[0038] Step 2, put the dispersion liquid into the reaction kettle and distill it under reduced pressure to form a viscous liquid, then add it into the ...

Embodiment 2

[0045] A kind of preparation method of porous zirconia carrier of the present invention, specifically implement according to the following steps:

[0046] Step 1, adding zirconium chloride to absolute ethanol, stirring evenly to form a solution; then adding a dispersant to ultrasonically disperse to obtain a dispersion;

[0047] The concentration of zirconium chloride in absolute ethanol is 25g / L, the stirring speed is 1100r / min, and the stirring temperature is 25°C;

[0048] The amount of dispersant added is 20% of the mass of zirconium chloride, the dispersant is a mixture of polyvinylpyrrolidone and ethylcellulose, and the mass ratio of polyvinylpyrrolidone to ethylcellulose is 1:4;

[0049] The time of ultrasonic dispersion is 40min, the temperature of ultrasonic dispersion is 60°C, and the ultrasonic frequency is 68kHz;

[0050] Step 2, put the dispersion liquid into the reaction kettle and distill it under reduced pressure to form a viscous liquid, then add it into the ...

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Abstract

The invention discloses a preparation method of a porous zirconium dioxide carrier, which specifically comprises the following steps: adding zirconium chloride into absolute ethyl alcohol, and uniformly stirring to form a dissolving solution; then adding a dispersing agent for ultrasonic dispersion to obtain dispersion liquid; putting the dispersion liquid into a reaction kettle, performing reduced pressure distillation to form viscous liquid, adding the viscous liquid into a mold, and performing constant-temperature pressing to form a precast block; and finally, putting the precast block into a first reaction kettle for standing, then putting into a second reaction kettle for standing, and sintering at constant temperature under infrared illumination after air purging to obtain the porous zirconium dioxide carrier. The zirconium dioxide carrier can form a stable illumination system, meanwhile, the zirconium dioxide surface and the precious metal form stable chemical bond connection, when the precious metal catalyst is inactivated, in the illumination treatment process, an illumination excitation state is formed at the joint of the precious metal and zirconium dioxide, so that holes and electrons are formed, the activity of the precious metal is promoted, and the catalytic activity of the precious metal is improved. The self activity recovery is realized.

Description

technical field [0001] The invention belongs to the technical field of catalytic carrier preparation, and in particular relates to a method for preparing a porous zirconia carrier. Background technique [0002] Zirconium dioxide has both surface acidic sites and surface basic sites, and also has good ion exchange performance and redox performance, so it can be used as a catalyst carrier. For supported catalysts, the more active components are dispersed on the surface of the carrier, the better the catalytic performance, and the dispersed amount of active components is closely related to the specific surface area of ​​the carrier. Therefore, the synthesis of porous bicarbonate with high specific surface area Zirconia can effectively improve the dispersion of supported metals, strengthen the metal-support interaction, and then improve the activity and stability of the catalyst. [0003] Octahedral porous ZrO by pyrolysis of UiO-66 by Lippi et al. 2 Load Ru, applied to CO 2 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J23/38B01J35/10B01J37/00B01J37/08B01J37/10B01J37/34
CPCB01J21/066B01J37/344B01J37/009B01J37/10B01J37/08B01J23/38B01J35/60
Inventor 周淑雁李伟峰王虹杜冰
Owner 陕西瑞科新材料股份有限公司
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