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Catalyst for removing carbon monoxide and its preparation method

A carbon monoxide and catalyst technology, which is applied in the field of carbon monoxide elimination catalyst and its preparation, can solve the problems of reducing fuel cell performance, poisoning Pt electrodes, etc., and achieves the effect of reducing cost and good selectivity

Inactive Publication Date: 2005-02-16
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a small amount of carbon monoxide in the carbon dioxide raw material gas will strongly inhibit the oxidation of hydrogen, and usually only by greatly increasing the reaction temperature can the complete elimination of hydrogen be achieved
Likewise, H 2 A large part of the hydrogen-rich raw material gas for fuel cells comes from methanol, reformed gas and water vapor shift, which often contains a small amount of CO, which will poison the Pt electrode and reduce the performance of the fuel cell.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Mix 10ml of 1M ferric nitrate solution and 0.2ml of 0.26M chloroauric acid solution evenly, add dropwise to 30ml (wt) 10% sodium carbonate solution under vigorous stirring to form a co-precipitation, adjust the PH value to 8, continue Stir for 2 hours, stand for 2.5 hours, filter, wash with distilled water, and place at room temperature for 24 hours to allow the catalyst to dry naturally to obtain catalyst cat1.

Embodiment 2

[0024] Mix 10ml of 1M zinc nitrate solution with 0.2ml of 0.26M chloroauric acid solution and place them in an Erlenmeyer flask. Add (wt) 10% ammonium carbonate solution 20ml dropwise under vigorous stirring to form a co-precipitation. Adjust PH value is 7.5, continue to stir for 2h, stand for 2.5h, filter, wash with distilled water, and place at room temperature for 24 hours to allow the catalyst to dry naturally to obtain catalyst cat2.

Embodiment 3

[0026] Mix 6ml of 50% manganese nitrate solution with 0.2ml of 0.26M bromoauric acid solution and add dropwise to 25ml of 1M potassium carbonate solution under vigorous stirring to form a co-precipitation. Adjust the pH to 9, and continue to stir for 2h. Let it stand for 2.5 hours, filter, wash with distilled water, and place it at 80°C for 24 hours to dry the catalyst to obtain catalyst cat3.

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PUM

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Abstract

The invention relates to an approach of producing a catalyst which can remove carbon monoxide in air or hydrogen. Catalyst in the invention is gold catalyst carried by hydroxid of iron, nickel, zinc and manganese. The catalyst can work to remove the carbon monoxide under room temperature. Characters of the catalyst are: working in a low temperature, low consumption and realizing to remove carbon monoxide under room temperature because carbon monoxide's activation is higher than hydrogen's.

Description

Technical field [0001] The invention relates to a catalyst for eliminating carbon monoxide and a preparation method thereof. Background technique [0002] Gold has long been widely used in various fields of production and life due to its unique chemical properties. Gold forms compounds with multiple oxidation states (-1 to +5) and multiple coordination numbers (2-7), and its relative effect (ratio of atomic and ionic radii) makes gold the most negatively charged metal in the periodic table. [0003] However, due to its inactive chemical properties, gold is considered unsuitable as a catalytic material; the melting point of gold (1063℃) is much lower than Pd (1550℃) and Pt (1769℃), which also makes people think that gold as a catalyst is not as good as other precious metals . Since Haruta et al. reported in 1987 that high-dispersion supported gold catalysts prepared by co-precipitation and other methods have good low-temperature oxidation activity for CO, gold catalysts have begun...

Claims

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Application Information

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IPC IPC(8): B01D53/62B01D53/86B01J23/52C01B3/54
CPCY02A50/20
Inventor 邓友全乔波涛石峰
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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