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Carbon monoxide and selective oxidizing catalyst and preparation thereof

A selective oxidation, carbon monoxide technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of drop, increase of carbon monoxide oxidation temperature, powdery sample strength To achieve the effects of good selectivity, long catalyst life and cost reduction

Inactive Publication Date: 2006-03-15
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its preparation method is mostly limited to the co-precipitation method, and the obtained powder sample has poor strength and short life, which is difficult to put into practical use
For the selective oxidation of carbon monoxide, because the presence of hydrogen inhibits the oxidation of carbon monoxide, resulting in an increase in the oxidation temperature of carbon monoxide and a decrease in selectivity, therefore, it is of great significance to find a catalyst that can oxidize and selectively oxidize carbon monoxide at a lower temperature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Immerse 10g of dried alumina particles in 5ml of 1mol L -1 After the ferric nitrate is absorbed, filter out the alumina particles, dry at room temperature for 24 hours, and roast at 400°C for 5 hours. After cooling, weigh 5g of the above alumina particles, place them in a 100ml Erlenmeyer flask, and add 30ml of 5× 10 -3 mol L -1 HAuCl 4 Aqueous solution, stirring with 0.1mol L -1 NaCO 3 Adjust the pH of the solution to 8, continue stirring for 1 h, let stand for 2 h, filter, wash, and dry at room temperature for 12 h to obtain the catalyst Catl.

Embodiment 2

[0028] Immerse 5g of dried alumina particles in 3ml of 1mol L -1 In the cobalt nitrate solution, after the cobalt nitrate is absorbed, filter out the alumina particles, dry at 100°C for 6h, roast at 400°C for 5h, put it in a 100ml Erlenmeyer flask after cooling, add 1×10-3 mol L -1 wxya 4 20ml, use 0.1mol L under stirring -1 Adjust the pH to 8 with NaOH solution, continue to stir for 1 h, let stand for 2 h, filter, wash slightly, and dry at 80° C. for 5 h to obtain catalyst Cat2.

Embodiment 3

[0030] Immerse 10g of dried alumina particles into 6ml of 50% manganese nitrate solution. After the nitric acid is sucked dry, take out the alumina, wash with distilled water, dry at 80°C for 6h, roast at 300°C for 5h, and weigh 5g after cooling. Placed in a 100ml Erlenmeyer flask, add 5×10 -3 mol L -1 AuCl 3 Aqueous solution 25ml, stirring with 0.1mol L -1 K 2 CO 3 Adjust the pH value to 8, continue to stir for 1 hour, let stand for 2 hours, filter, wash with distilled water, and dry at 80°C for 5 hours to obtain catalyst Cat3.

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Abstract

A catalyst for oxidizing the CO in waste gas and selectively oxidizing the CO under the existence of oxygen and the CO in the mixture of CO and hydrogen gas is prepared from the carrier which is the alumina particle carried oxide of transition metal chosen from Fe, Co and Mn, and the Au as the active component through the combination of dipping method and deposition-precipitation method.

Description

field of invention [0001] The invention relates to a catalyst for carbon monoxide oxidation and selective oxidation and a preparation method thereof. Background technique [0002] Carbon monoxide is the primary pollutant in many industrial environments and indoor environments. In fire sites, coal mine tunnels and other places, excessive carbon monoxide concentration will lead to human poisoning and death, and there is also a danger of explosion. In closed environments such as spaceships and submarines, batteries and engines will produce a small amount of carbon monoxide during work, which may also cause explosions and personnel poisoning. Therefore, the elimination of trace carbon monoxide has extremely important significance for environmental protection and industrial production. [0003] Furthermore, the presence of carbon monoxide strongly inhibits the oxidation of hydrogen. For example, in the industrial synthesis of urea, because the carbon dioxide raw material gas us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/62B01D53/86B01J23/34B01J23/74
CPCY02A50/20
Inventor 邓友全乔波涛李作鹏
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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