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Gold-base catalyst for room-temperature carbon monoxide removal and preparation method thereof

A gold catalyst, catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the loss of active centers, complex carrier surface, gold particle agglomeration problem, to achieve the effect of convenient operation, simple process and good repeatability

Active Publication Date: 2014-02-26
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This preparation method effectively improves the activity of the gold catalyst for catalytic oxidation of carbon monoxide at room temperature, but its reproducibility is still poor, mainly because the surface of the support is often complex, and the direct roasting activation of the gold precursor is an uncontrollable process. While constructing the interface, it is also easy to cause the aggregation of gold particles and lose some active centers.

Method used

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  • Gold-base catalyst for room-temperature carbon monoxide removal and preparation method thereof
  • Gold-base catalyst for room-temperature carbon monoxide removal and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0016] At room temperature, take 100mL of distilled water and place it in a 200mL beaker, disperse 0.1mL of chloroauric acid solution with a gold equivalent concentration of 9.6g / L in it, add 2.5g of urea under magnetic stirring, wait for the urea to dissolve, then add 2g of mn 2 o 3 The carrier was then placed in a water bath at 80°C, and after magnetic stirring for 1 hour, it was taken out and cooled to room temperature. The suspension was filtered and washed several times with deionized water, and the obtained solid was redispersed in 100 mL of distilled water. Stir magnetically at room temperature, and irradiate with a UV lamp for 1 hour, filter, wash several times, and dry in an oven at 80°C for 12 hours. Finally, the obtained solid powder was calcined in a muffle furnace at 300°C for 2 hours to obtain the catalyst Au / Mn 2 o 3 .

[0017] 50 mg of catalyst was placed in a fixed bed reactor, and a mixed gas of 1% CO and 99% air was introduced, the flow rate was 20 mL / m...

Embodiment 2

[0019] At room temperature, take 50mL of distilled water and place it in a 100mL beaker, disperse 0.05mL of chloroauric acid solution with a gold equivalent concentration of 9.6g / L in it, add 2g of urea under magnetic stirring, wait for the urea to dissolve, then add 1g of titanium oxide (P25, Degussa Company), then placed in a water bath at 80°C, stirred by magnetic force for 1 hour, took out and cooled to room temperature, filtered the suspension and washed it several times with deionized water, and then dispersed the obtained solid in 100mL of distilled water, Stir magnetically at room temperature, and irradiate with a UV lamp for 1 hour, filter, wash several times, and dry in an oven at 80°C for 12 hours. Finally, the obtained solid powder was calcined in a muffle furnace at 300° C. for 2 h to obtain the catalyst Au / P25.

[0020] The test was carried out according to the catalyst activity evaluation method described in Example 1. figure 1 Activity curves for carbon monoxi...

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Abstract

The invention discloses a gold-base catalyst for room-temperature carbon monoxide removal and a preparation method thereof. According to the invention, a traditional deposition-coprecipitation method for preparation of the gold-base catalyst is improved; a gold precursor is activated by adopting a light-heat combination mode to prepare a gold catalyst for performing catalytic oxidation on carbon monoxide at room temperature; and the gold utilization rate is improved. The method is simple in process flow, convenient to operate and high in repeatability, the preparation parameters are easily controlled, and the large-scale synthesis can be realized.

Description

technical field [0001] The invention relates to a catalyst in the technical field of chemical engineering and environmental treatment and a preparation method thereof, in particular to a gold-based catalyst for catalytic oxidation of carbon monoxide at room temperature and a preparation method thereof. Background technique [0002] Carbon monoxide (CO) is a flammable, explosive, and highly toxic gas pollutant, mainly produced in the incomplete combustion process of hydrocarbons and other organic substances, and the ppm level of CO can directly threaten human survival and health. Therefore, the catalytic removal of CO has always been one of the hotspots in the fields of chemical engineering and environmental governance. The newly developed gold catalyst has good humidity resistance and low-temperature catalytic performance. However, the thermodynamic instability of high-valence gold makes the gold precursor easy to decompose during the preparation of the catalyst. Therefore, ...

Claims

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Application Information

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IPC IPC(8): B01J23/68B01J23/52B01J23/66B01D53/86B01D53/62
CPCY02A50/20
Inventor 黄新松李广社李莉萍
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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