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Room temperature catalytic oxidation carbon monoxide catalyst and preparation method thereof

A technology for catalytic oxidation and carbon monoxide, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as short life, narrow applicable concentration range of CO catalytic purification, complex structure, etc., and achieve renewable The effect of regeneration method

Inactive Publication Date: 2009-11-18
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing carbon monoxide catalytic oxidation catalysts at room temperature have disadvantages such as complicated preparation process, sensitivity to moisture and easy deactivation, short life, complex structure, and narrow concentration range for catalytic purification of CO.

Method used

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  • Room temperature catalytic oxidation carbon monoxide catalyst and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) Measure 0.0333mL of PdCl with a concentration of 0.423mol / L 2 Dilute HCl aqueous solution and dilute it to 0.5mL with deionized water to prepare impregnation solution;

[0020] 2) Add 0.5 g of 20-30 mesh γ-Al 2 o 3 Immerse the carrier in the above prepared impregnating solution, mix the carrier and the impregnating solution evenly, and immerse at 45°C for 2 hours to make a mixed impregnating solution;

[0021] 3) Dry the mixed impregnation solution at 120°C for 2 hours to prepare a catalyst for the catalytic oxidation of carbon monoxide at room temperature, in which PdCl 2 The content is 0.5% (wt).

[0022] The catalytic performance of the prepared catalyst was evaluated according to the aforementioned test conditions, and the conversion rate of the catalyst to a small amount of carbon monoxide was 98.4%.

Embodiment 2

[0024] 1) Measure 0.0667mL of PdCl with a concentration of 0.423mol / L 2 Dilute HCl aqueous solution and dilute it to 0.5mL with deionized water to prepare impregnation solution;

[0025] 2) Add 0.5 g of 20-30 mesh γ-Al 2 o 3 Immerse the carrier in the above prepared impregnating solution, mix the carrier and the impregnating solution evenly, and immerse at 10°C for 2 hours to make a mixed impregnating solution;

[0026] 3) Dry the mixed impregnation solution at 120°C for 2 hours to prepare a catalyst for the catalytic oxidation of carbon monoxide at room temperature, in which PdCl 2 The content is 1.0% (wt).

[0027] The catalytic performance of the prepared catalyst was evaluated according to the aforementioned test conditions, and the conversion rate of the catalyst to a small amount of carbon monoxide was 99.7%.

Embodiment 3

[0029] 1) Measure 0.0333mL of PdCl with a concentration of 0.423mol / L 2 Dilute HCl aqueous solution and dilute it to 0.5mL with absolute ethanol to prepare impregnation solution;

[0030] 2) Add 0.5 g of 20-30 mesh γ-Al 2 o 3 Immerse the carrier in the prepared impregnating solution, mix the carrier and the impregnating solution evenly, and immerse at 80°C for 2 hours to make a mixed impregnating solution;

[0031] 3) Dry the mixed impregnation solution at 120°C for 2 hours to prepare a catalyst for the catalytic oxidation of carbon monoxide at room temperature, in which PdCl 2 The content is 0.5% (wt).

[0032] The catalytic performance of the prepared catalyst was evaluated according to the aforementioned test conditions, and the conversion rate of the catalyst to a small amount of carbon monoxide was 99.8%.

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Abstract

The invention relates to a room temperature catalytic oxidation carbon monoxide catalyst and a preparation method thereof in the technical field of catalyst; the catalyst has the following components by mass percent: 0.5-1.0% of PdCl2 and 99.5-99.0% of gamma-AL2O3; the preparation method of the catalyst has the following steps: preparing steeping fluid, configurating mixed steeping fluid and carrying out drying. Compared with other normal temperature carbon monoxide catalysts, the activity of the catalyst prepared by the method of the invention is more than 98% and the conversion rate can reach as high as 77.7% in case of reaction for 15 hours in a row under saturated vapor pressure, meanwhile the catalyst is reproducible and the method therefor is simple and effective.

Description

technical field [0001] The invention relates to a catalyst in the technical field of chemical industry and a preparation method thereof, in particular to a catalyst for catalytic oxidation of carbon monoxide at room temperature and a preparation method thereof. Background technique [0002] CO is a typical flammable and toxic compound. Combustion of fossil fuels, the chemical industry, and the use of motor vehicles, resulting in large amounts of CO emissions, have become serious environmental problems and have attracted widespread attention. At present, CO low-temperature oxidation purification is an important research topic in environmental protection process and industrial production, such as internally closed CO 2 Gas purification in lasers, tobacco harm reduction, automobile exhaust, CO gas sensors, gas masks, elimination of trace amounts of CO in closed systems (such as aircraft, submarines, spacecraft, etc.), etc. For CO low-temperature catalytic oxidation catalysts,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/13B01J37/02B01D53/62B01D53/86B01D53/94
CPCY02A50/20
Inventor 姚炜王燕刚周洁刘洋张豪杰何丹农
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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