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Catalyst based on three-way catalyst ceramic carrier and preparation method thereof

A three-way catalytic converter and ceramic carrier technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of poor adhesion and durability of catalytic active components, and affect the catalytic effect, etc., to achieve Shorten the grinding time, improve the effective utilization rate, and ensure the effect of stability

Pending Publication Date: 2022-08-05
DONGFENG MOTOR GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing honeycomb monolithic catalysts obtained by loading methods have poor adhesion and durability of the catalytic active components on the honeycomb ceramic carrier, which in turn affects the catalytic effect

Method used

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  • Catalyst based on three-way catalyst ceramic carrier and preparation method thereof
  • Catalyst based on three-way catalyst ceramic carrier and preparation method thereof

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Effect test

preparation example Construction

[0032] figure 1 It is a schematic flow diagram of a preparation method of a catalyst based on a three-way catalyst ceramic carrier of the present application, refer to figure 1 , the preparation method of the catalyst provided by the application comprises the following steps:

[0033] In step S101, the coating material is added to the aqueous solution of the alumina dry rubber powder, and after stirring for 20-40 min, a coating slurry is obtained; wherein, in parts by mass, the coating material includes: 1-5 parts of alumina, 10 -15 parts of manganese oxide, 8-15 parts of cerium oxide, 1-10 parts of yttrium oxide; the pore volume of the alumina dry rubber powder is not less than 1 mL / g, and the weight ratio of the coating material to the aqueous solution of the alumina dry rubber powder is 1 : (2.5-3.2), the mass fraction of the aqueous solution of the alumina dry rubber powder is 15wt%-20wt%;

[0034]Step S102, using 10wt% nitric acid to have a density of 2.1-2.2g / cm 3 The...

Embodiment 1

[0042] Embodiment 1 of the present application provides a preparation method of a catalyst based on a three-way catalyst ceramic carrier, comprising the following steps:

[0043] Preparation of coating material: Add citric acid to a mixed solution of aluminum nitrate, manganese nitrate, cerium nitrate, yttrium nitrate and water at 70 °C, stir and place at 105 °C for 8 hours, fully grind and then calcine at 450 °C for 4 hours, that is, The coating material is obtained; the mass parts of each substance in the coating material are: 1 part of aluminum oxide, 10 parts of manganese oxide, 8 parts of cerium oxide, and 1 part of yttrium oxide; the weight ratio of citric acid, water and aluminum nitrate is 1:3 :1;

[0044] The coating material was added to the aqueous solution of 15 wt % alumina dry rubber powder, and after stirring for 20 minutes, a coating slurry was obtained; the weight ratio of the coating material and the aqueous solution of the alumina dry rubber powder was 1:2.5...

Embodiment 2

[0047] Embodiment 2 of the present application provides a method for preparing a catalyst based on a three-way catalyst ceramic carrier, comprising the following steps:

[0048] Preparation of coating material: Add citric acid to a mixed solution of aluminum nitrate, manganese nitrate, cerium nitrate, yttrium nitrate and water at 80°C, stir and place at 110°C for 5h, fully grind and then calcine at 550°C for 3h, that is, The coating material is obtained; the mass parts of each substance in the coating material are: 5 parts of aluminum oxide, 15 parts of manganese oxide, 15 parts of cerium oxide, 10 parts of yttrium oxide; the weight ratio of citric acid, water and aluminum nitrate is 3:4 :1;

[0049] The coating material was added to the aqueous solution of 20wt% alumina dry rubber powder, and after stirring for 40 minutes, a coating slurry was obtained; the weight ratio of the coating material and the aqueous solution of the alumina dry rubber powder was 1:3.2;

[0050] The ...

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Abstract

The invention relates to the technical field of catalysts, in particular to a catalyst based on a three-way catalyst ceramic carrier and a preparation method of the catalyst. The preparation method of the catalyst based on the three-way catalyst ceramic carrier, provided by the invention, comprises the following steps: adding a coating material into an aqueous solution of alumina dry glue powder, and stirring for 20-40 minutes to obtain coating slurry; wherein the coating material is prepared from the following components in parts by mass: 1 to 5 parts of aluminum oxide, 10 to 15 parts of manganese oxide, 8 to 15 parts of cerium oxide and 1 to 10 parts of yttrium oxide; and soaking a honeycomb ceramic carrier in the coating slurry for 1-3 minutes, repeatedly soaking for 2-3 times, taking out, drying at 100-110 DEG C for 3-5 hours, and calcining at 450-500 DEG C for 4-5 hours to obtain the catalyst. The catalyst provided by the invention has the advantages of excellent purification effect, stable catalytic effect and high effective utilization rate.

Description

technical field [0001] The present application relates to the technical field of catalysts, in particular to a catalyst based on a three-way catalyst ceramic carrier and a preparation method thereof. Background technique [0002] Vehicle exhaust emissions have become a major source of air pollution. Vehicle exhaust contains carbon monoxide, nitrogen oxides and other solid particles that have adverse effects on the human body. At present, automobile exhaust gas purification catalysts are the most effective means to control automobile exhaust gas emissions and reduce automobile pollution. Commonly used catalysts include precious metal catalysts and rare earth automobile exhaust gas purification catalysts. Precious metal catalysts are mainly used as catalysts such as platinum and palladium, which have high activity and long service life. It has the advantages of good purification effect and strong practicability, but it is difficult to be widely promoted; rare earth automobile ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J35/04B01J37/02
CPCB01J37/0232B01J37/0215B01J37/0217B01J37/0219B01J37/0205B01J23/34B01J23/002B01J2523/00B01J35/56B01J2523/31B01J2523/36B01J2523/3712B01J2523/72Y02T10/12
Inventor 黄硕熊芬高祥达张旭施衡
Owner DONGFENG MOTOR GRP
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