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Preparation method of catalyst using multi-walled carbon nanotube as carrier and for preferential oxidation of CO

A technology of multi-walled carbon nanotubes and catalysts, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of uneven distribution, low product filling rate, It is difficult to fill carbon nanotubes and other problems to achieve the effects of good CO conversion and selectivity, low price, and simple and easy preparation process.

Inactive Publication Date: 2014-03-26
INNER MONGOLIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And there are also some studies and reports about filling metal and metal oxide nanoparticles in carbon nanotubes at home and abroad, but some metal oxides with relatively high surface area tension (such as CuO, Fe and Fe 2 o 3 etc.) It is difficult to fill carbon nanotubes, and the product has problems such as low filling rate and uneven distribution of filling in carbon nanotubes.

Method used

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  • Preparation method of catalyst using multi-walled carbon nanotube as carrier and for preferential oxidation of CO
  • Preparation method of catalyst using multi-walled carbon nanotube as carrier and for preferential oxidation of CO
  • Preparation method of catalyst using multi-walled carbon nanotube as carrier and for preferential oxidation of CO

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A MWCNTs-supported Cu for preferential oxidation of CO 2 The preparation method of O catalyst, its step comprises:

[0031] 1) Take 3g MWCNTs into the flask, add 150ml concentrated HNO 3 (68wt.%), sonicated for 3 hours, washed with distilled water until PH = 7, and then dried in a vacuum oven at 60°C for 12 hours to obtain the treated MWCNTs, ready for use.

[0032] 2) Take 1 g of the treated MWCNTs carrier prepared in the above step 1), add distilled water dropwise to the incipient wetness, and record its water absorption as 10 ml, which is the minimum amount of water required to wet the carrier.

[0033] 3) Take 0.2789g of Cu(CH 3 OO) 2 ·H 2 O was placed in a beaker, and 10ml of distilled water was added, sonicated until completely dissolved to make Cu(CH 3 OO) 2 solution, spare;

[0034] 4) Take 1g of the treated MWCNTs carrier prepared in the above step 1), calculate the mass of copper acetate according to the copper loading of 10wt.%, and prepare the solution ...

Embodiment 2

[0037] A MWCNTs-supported CeO for preferential oxidation of CO 2 The preparation method of catalyst, its step comprises:

[0038] 1) Take 3g of purchased MWCNTs and put them in a flask, add 150ml concentrated HNO 3 (68wt.%), sonicated for 3 hours, washed with distilled water until PH = 7, and then dried in a vacuum oven at 60°C for 12 hours to obtain the treated MWCNTs, ready for use.

[0039] 2) Take 1 g of the treated MWCNTs carrier prepared in the above step 1), add distilled water dropwise to the incipient wetness, and record its water absorption as 10 ml, which is the minimum amount of water required to wet the carrier.

[0040] 3) Take 0.2803g of Ce(NO 3 ) 3 ·6H 2 O was placed in a beaker, 10ml of distilled water was added, and ultrasonically dissolved until it was completely dissolved to produce Ce(NO 3 ) 3 solution, spare;

[0041] 4) Take 1g of the treated MWCNTs carrier prepared in the above step 1), calculate the mass of cerium nitrate according to the cerium...

Embodiment 3

[0044] A MWCNTs-supported Cu for preferential oxidation of CO 2 O-CeO 2 The preparation method of catalyst, its step comprises:

[0045] 1) Take 3g of purchased MWCNTs and put them in a flask, add 150ml concentrated HNO 3 (68wt.%), sonicated for 3 hours, washed with distilled water until PH = 7, and then dried in a vacuum oven at 60°C for 12 hours to obtain the treated MWCNTs, ready for use.

[0046] 2) Take 1 g of the treated MWCNTs carrier prepared in the above step 1), add distilled water dropwise to the incipient wetness, and record its water absorption as 10 ml, which is the minimum amount of water required to wet the carrier.

[0047] 3) Take 0.1321g of Cu(CH 3 OO) 2 ·H 2 O is placed in a beaker, and 0.2873g of Ce(NO 3 ) 3 ·6H 2 O is placed in a beaker, the molar ratio of Cu and Ce is 1:1, add 10ml of distilled water, and ultrasonically dissolve until completely dissolved to make a mixed solution for later use;

[0048] 4) Take 1g of the treated MWCNTs carrier p...

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Abstract

The invention discloses a preparation method of a catalyst using multi-walled carbon nanotubes (MWCNTs) as a carrier and for preferential oxidation of CO, and application of the catalyst to the preferential oxidation reaction of CO. According to the MWCNTs supported Cu2O-CeO2 catalyst for preferential oxidation of CO, copper acetate and cerium nitrate are used as raw materials for direct preparation of the catalyst for preferential oxidation of CO and with MWCNTs filled with Cu2O and CeO2 nanoparticles through an impregnation method. The catalyst has high conversion rate and selectivity in preferential oxidation of CO, and realizes a wide temperature window for complete conversion of CO.

Description

technical field [0001] The present invention relates to a Cu 2 O-CeO 2 Catalysts, especially involving a MWCNTs-supported Cu for preferential oxidation of CO 2 O-CeO 2 catalyst. Background technique [0002] The fuel of today's proton exchange membrane fuel cell is pure hydrogen gas, and its raw material gas is obtained through the reforming of hydrocarbons and the reaction of water gas change. The obtained hydrogen-rich gas mainly contains 45-75vol.%H 2 , 15-25vol.%CO 2 , 0.5-2vol.% CO and a small amount of water vapor, because CO will poison the Pt electrode, the CO concentration in the hydrogen-rich gas must be reduced below 10ppm, and the preferential oxidation of CO is the most effective and direct way to reduce its concentration , so the preferential oxidation of CO in hydrogen-rich gas is one of the key technologies for fuel cell raw gas preparation. The preferential oxidation of CO means that under the reaction conditions, a small amount of oxygen or air is add...

Claims

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Application Information

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IPC IPC(8): B01J23/83C01B3/58
Inventor 曾尚红江楠陈天嘉赵小舟苏海全
Owner INNER MONGOLIA UNIVERSITY
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