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High-efficiency CO oxidation catalyst and preparation method thereof

An oxidation catalyst and high-efficiency technology, applied in the field of catalysts and electrochemistry, can solve the problems of difficult selection of adsorption materials, low adsorption efficiency, and large equipment volume, and achieve the effects of good wash-off, high solubility, and low price

Active Publication Date: 2020-05-29
SHENZHEN ZHENGTIANWEI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The physical elimination method mainly refers to the use of some porous substances (such as activated carbon) to adsorb CO to reduce the residual amount of CO in the air. large, so the application of this method is greatly limited

Method used

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  • High-efficiency CO oxidation catalyst and preparation method thereof
  • High-efficiency CO oxidation catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071]A method for preparing a high-efficiency CO oxidation catalyst, comprising the following processing steps:

[0072] (1) Select 5 series aluminum alloy less than 0.5cm as the base material.

[0073] (2) Pretreating the aluminum substrate, the pretreatment process is alkaline-hot water washing-alkali washing-hot water washing-cold water washing-acid washing-water washing steps.

[0074] (3) Anodize the treated aluminum substrate to form an oxide film on the surface. The solution used for anodizing is a mixture of oxalic acid, phosphoric acid and sulfosalicylic acid. The concentration of oxalic acid is 0.25M, and the concentration of phosphoric acid is The concentration of sulfosalicylic acid is 0.05M, the voltage of the anodic oxidation process is 20V, the temperature is 30oC, the current density is 2A / dm2, and the time is 20min.

[0075] (4) The protective film is adsorbed on the surface of the porous layer of the anodized film, and the protective film is not adsorbed on...

Embodiment 2

[0082] A method for preparing a high-efficiency CO oxidation catalyst, comprising the following processing steps:

[0083] (1) Select 5 series aluminum alloy less than 0.5cm as the base material;

[0084] (2) Pretreating the aluminum substrate, the pretreatment process is alkaline-hot water washing-alkali washing-hot water washing-cold water washing-acid washing-water washing steps.

[0085] (3) Anodize the treated aluminum substrate to form an oxide film on the surface. The solution used for anodizing is a mixture of oxalic acid, phosphoric acid and sulfosalicylic acid. The concentration of oxalic acid is 0.275M, and the concentration of phosphoric acid is The concentration of sulfosalicylic acid is 0.1M, the voltage of the anodic oxidation process is 25V, the temperature is 30oC, the current density is 2.5A / dm2, and the time is 25min.

[0086] (4) The protective film is adsorbed on the surface of the porous layer of the anodized film, and the protective film is not adsorbed...

Embodiment 3

[0093] A method for preparing a high-efficiency CO oxidation catalyst, comprising the following processing steps:

[0094] (1) Select 5 series aluminum alloy less than 0.5cm as the base material;

[0095] (2) Pretreating the aluminum substrate, the pretreatment process is alkaline-hot water washing-alkali washing-hot water washing-cold water washing-acid washing-water washing steps.

[0096] (3) Anodize the treated aluminum substrate to form an oxide film on the surface. The solution used for anodizing is a mixture of oxalic acid, phosphoric acid and sulfosalicylic acid. The concentration of oxalic acid is 0.3M, and the concentration of phosphoric acid is The concentration of sulfosalicylic acid is 0.15M, the voltage of the anodic oxidation process is 30V, the temperature is 30oC, the current density is 3A / dm2, and the time is 30min.

[0097] (4) The protective film is adsorbed on the surface of the porous layer of the anodized film, and the protective film is not adsorbed on...

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Abstract

The invention provides a CO oxidation catalyst and a preparation method thereof. The catalyst carrier is a through-hole type aluminum oxide pore channel array obtained by calibrating a corrosion anodeoxide film and a replacement reaction, no shielding layer exists in the aluminum oxide pore channel array, the pore channel structure of the array is complete and uniform, and a Pt active component is impregnated on the surface of the aluminum oxide pore channel array to obtain the Pt / Al2O3 catalyst.

Description

technical field [0001] The invention relates to a through-hole alumina catalyst carrier and a preparation method thereof, which belongs to the fields of electrochemistry and catalysts, and is especially suitable for the field of supported catalysts and preparation methods thereof. The catalysis relates in particular to the catalytic reaction of CO oxidation. [0002] technical background [0003] Aluminum or aluminum alloy anodizing refers to the process of immersing aluminum or aluminum alloy in a suitable electrolyte as an anode for electrification, and forming an oxide film (Al2O layer) on the surface of aluminum or aluminum alloy. The existence of this layer of oxide film can improve the corrosion resistance of aluminum alloy. At the same time, with the help of the special structure of the oxide film and the later treatment process, for example, the anodic oxide film can also be combined with surface painting and other further treatments to make the substrate more harsh. ...

Claims

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Application Information

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IPC IPC(8): B01J21/04B01J32/00B01J23/42B01J35/04B01J37/00B01J37/02B01J37/32B01J37/34C07C1/04C07C9/04
CPCB01J37/348B01J37/32B01J37/009B01J21/04B01J37/0201B01J23/42C07C1/043C07C1/0445C07C2523/42B01J35/56C07C9/04Y02E60/36
Inventor 王永芝
Owner SHENZHEN ZHENGTIANWEI TECH
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