Preparation method of supported catalyst and supported catalyst

A supported catalyst and co-catalyst technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low catalytic efficiency and easy poisoning of catalysts

Inactive Publication Date: 2012-02-08
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problems of easy poisoning and low catalytic efficiency of catalysts in the prior art, the invention provides a preparation method of supported catalysts

Method used

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  • Preparation method of supported catalyst and supported catalyst

Examples

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preparation example Construction

[0014] The preparation method of the supported catalyst disclosed by the invention comprises:

[0015] a. Impregnating the adsorbent with an active component solution to obtain an active adsorbent; wherein, the adsorbent is one or more of activated carbon, mesoporous carbon, and amorphous carbon;

[0016] b. Mixing the active adsorbent and the carrier in the presence of water to form a slurry; the carrier contains alumina and a cocatalyst, with or without active metal nitrates and binders;

[0017] c. Coating the slurry on the honeycomb ceramic substrate, drying, and firing in an oxidative atmosphere to ablate and remove the adsorbent to obtain a supported catalyst.

[0018] According to the present invention, the active component solution used is a solution of various active substances used for catalysis in the prior art, for example, the nitrates of noble metal active substances Pt, Pd, Rh in the field of automobile exhaust catalysis, etc., specifically in various fields Th...

Embodiment 1

[0044] This example is used to illustrate the preparation method of the supported catalyst and the supported catalyst provided by the present invention.

[0045] At 55 parts by weight, the pH value is 2, and concentration is the spherical activated carbon (D 50 3um, the specific surface is 1500m 2 / g, the ablation temperature is 600°C), soaking for 120min.

[0046] Add 25 parts by weight of alumina (Zibo Boyang Chemical Co., Ltd. company, average pore diameter is 20nm, average pore volume is 0.5mL / g), 15 parts by weight of cerium-zirconium composite oxide (Zibo Huaqing powder material Technology Co., Ltd., the average pore diameter is 19.4nm, and the average pore volume is 0.21mL / g), and then the above mixed system is ball milled in a ball mill at a speed of 200r / min for 4h, and then dried at 90°C for 4h to obtain a slurry.

[0047] The slurry was adsorbed on a cordierite honeycomb ceramic substrate (a Φ96×125 mm cylindrical cordierite honeycomb ceramic substrate produced by...

Embodiment 2

[0049] This example is used to illustrate the preparation method of the supported catalyst and the supported catalyst provided by the present invention.

[0050] At 55 parts by weight, the pH value is 4, and in the active ingredient solution (concentration is the palladium nitrate of 1.3wt%, concentration is the rhodium nitrate of 0.2wt%), the amorphous carbon (specific surface is 500m2) of 5 parts by weight is added 2 / g, the ablation temperature is 600°C), soaked for 150min.

[0051] Add 14 parts by weight of alumina (Zibo Boyang Chemical Co., Ltd. company, average pore diameter is 20nm, average pore volume is 0.5mL / g), 24 parts by weight of cerium-zirconium-lanthanum composite oxide (Zibo Huaqing powder Body Material Technology Co., Ltd., the average pore diameter is 19.4nm, and the average pore volume is 0.21mL / g), 1 part by weight of yttrium nitrate (Zibo Huaqing Powder Material Technology Co., Ltd.), 1 part by weight of barium nitrate (Zibo Huaqing Powder Material Techn...

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Abstract

The invention provides a preparation method of a supported catalyst and a supported catalyst. The preparation method of the supported catalyst comprises the following steps: a. dipping an adsorbent in an active component solution to obtain an active adsorbent; wherein the adsorbent is one or more than one of active carbon, meso-porous carbon, amorphous carbon; b. mixing the active adsorbent with a carrier in the presence of water to form slurry; wherein the carrier contains alumina, a cocatalyst, nitrates with or without active metals, and a binder; c. coating the slurry on a honeycomb ceramic substrate, drying, roasting in oxidizing atmosphere to remove the adsorbent by ablation so as to obtain the supported catalyst. The supported catalyst prepared by the method has high catalytic efficiency, good poisoning resistance, and long service life.

Description

technical field [0001] The invention relates to a preparation method of a supported catalyst and a supported catalyst prepared by the method. Background technique [0002] With the continuous development of the industrial catalyst industry, there are higher requirements for various catalyst technologies. Due to the limited resources of the earth or the high price of raw materials, especially in the preparation of catalysts with noble metals such as Pt as active components, it is difficult to meet the needs of modern industry by using traditional catalyst preparation techniques. [0003] The general catalytic reaction is contact catalysis, so the catalyst is required to have a large specific surface area. However, in order to speed up the catalytic process, it is necessary to ensure that the reactants can be in contact with the catalyst in time and the products can also be desorbed quickly. The traditional preparation of supported catalysts generally includes impregnation m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/63B01J37/02
Inventor 方海积方伟刘武略
Owner BYD CO LTD
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