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Nano carbon material modified copper base catalyst and its preparing method

A nano-carbon material, copper-based catalyst technology, applied in chemical instruments and methods, inorganic chemistry, bulk chemical production, etc., can solve the problems of high carbon monoxide content in reformed gas, unable to meet the demand for hydrogen production of vehicle fuel cells, etc.

Inactive Publication Date: 2007-02-28
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, CuO / ZnO / Al prepared by this method 2 o 3 Catalysts usually achieve a high methanol conversion rate at a temperature > 280°C, which obviously cannot meet the actual hydrogen production needs of vehicle-mounted fuel cells.
Recently, it has been reported that oxides of transition metal elements such as Mn, Cr, and Zr were used as promoters to prepare oxide-modified CuO / ZnO / Al 2 o 3 Catalyst, which can realize methanol conversion of more than 95% under the condition of about 250 ° C, but the content of carbon monoxide in the reformed gas obtained by this type of catalyst is still high

Method used

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  • Nano carbon material modified copper base catalyst and its preparing method
  • Nano carbon material modified copper base catalyst and its preparing method

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Experimental program
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Effect test

Embodiment 1

[0019] Embodiment 1, at first 7.26g Cu (NO 3 ) 2 ·3H 2 O, 8.91g Zn(NO 3 ) 2 ·6H 2 O, 2.50g Al(NO 3 ) 3 9H 2 O (AR grade) was prepared into a 0.1M solution and mixed, and then 7.42g of AR grade anhydrous Na 2 CO 3 Prepared as a 0.1M solution. Then, under strong stirring conditions, the nitrate solution and sodium carbonate solution were dripped into 100mL aqueous solution preset with 0.45g activated carbon powder (400-600 mesh), the solution temperature was controlled at 60°C, and the pH was 7.0-7.2 . Continue to stir for 4 hours after the reaction, then wash with deionized water, fully beat, filter, and finally dry at 110°C for 12h, and bake at 360°C for 4h under the protection of nitrogen to prepare the catalyst precursor in the oxidation state. In the sample, Cu / Zn / Al=45 / 45 / 10 (molar ratio), and the active carbon in the catalyst oxidation state precursor is 8wt%.

[0020] The evaluation of the catalyst's hydrogen production activity by steam reforming of methano...

Embodiment 2

[0024] First, 7.26g Cu(NO 3 ) 2 ·3H 2 O, 8.91g Zn(NO 3 ) 2 ·6H 2 O, 2.50g Al(NO 3 ) 3 9H 2 O (AR grade) was prepared into a 0.1M solution and mixed, and then 7.42g of AR grade anhydrous Na 2 CO 3 Prepared as a 0.1M solution. Then, under strong stirring conditions, the nitrate solution and the sodium carbonate solution were dripped into the 100mL aqueous solution pre-prepared with 0.45g nanometer carbon fiber, the solution temperature was controlled at 20°C, and the pH was 7.0-7.2. Continue to stir for 4 hours after the reaction, then wash with deionized water, fully beat, filter, and finally dry at 110°C for 12h, and bake at 360°C for 4h under the protection of nitrogen to prepare the catalyst precursor in the oxidation state. In the sample, Cu / Zn / Al=45 / 45 / 10 (molar ratio), and the carbon nanofiber in the catalyst oxidation state precursor is 8wt%. Catalyst activity evaluation is the same as embodiment 1, and the result shows: at normal pressure, low temperature 23...

Embodiment 3

[0026] First, 7.26g Cu(NO 3 ) 2 ·3H 2 O, 8.91g Zn(NO 3 ) 2 ·6H 2 O, 2.50g Al(NO 3 ) 3 9H 2 O (AR grade) was prepared into a 0.1M solution and mixed, and then 7.42g of AR grade anhydrous Na 2 CO 3 Prepared as a 0.1M solution. Then, under the condition of strong stirring, the nitrate solution and the sodium carbonate solution were dripped into the 100mL aqueous solution pre-placed with 0.45g carbon nanotubes, the temperature of the solution was controlled at 60°C, and the pH was 7.0-7.2. Continue to stir for 4 hours after the reaction, then wash with deionized water, fully beat, filter, and finally dry at 110°C for 12h, and bake at 360°C for 4h under the protection of nitrogen to prepare the catalyst precursor in the oxidation state. In the sample, Cu / Zn / Al=45 / 45 / 10 (molar ratio), and the carbon nanotube in the catalyst oxidation state precursor is 8wt%. Catalyst activity evaluation is the same as embodiment 1, and the result shows: at normal pressure, low temperatur...

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Abstract

The present invention belongs to the field of chemical technology, and especially one kind of copper base catalyst with nanometer carbon material as co-catalyst for vapor reformation of methanol to prepare hydrogen and its preparation process. The catalyst is prepared through the process including the steps of: compounding 0.1 M solution of Cu / Zn / Al nitrate; compounding 0.1 M solution of sodium carbonate, dropping the 0.1 M solution of Cu / Zn / Al nitrate and 0.1 M solution of sodium carbonate in the same rate into reactor with nanometer carbon material for co-precipitation under strong stirring and 60 deg.c to obtain carbonate coprecipitate containing nanometer carbon material; washing, drying, roasting, etc. The prepared catalyst has unique porous structure of great specific surface area, high low temperature activity and high hydrogen selectivity, and may be used in preparing reformed product with hydrogen content up to 75 % and CO content lower than 0.1 %.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a copper-based catalyst modified by a nano-carbon material, which is applied to hydrogen production by steam reforming of methanol. technical background [0002] As a liquid fuel, methanol has become the most promising high-energy-carrying fuel due to its advantages of high energy density, low carbon content, and transportation and storage. Through catalytic conversion, hydrogen can be generated instantly, which can effectively solve the problems existing in the utilization of hydrogen energy. To solve this problem, it becomes an ideal hydrogen carrier, and using it as a hydrogen source for fuel cells is a hot research topic at present. As a hydrogen source for fuel cells, the hydrogen production rate of methanol steam reforming hydrogen production and the H in reformed gas 2 There are certain requirements for CO content and CO content, especially for CO co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/80C01B3/40
CPCY02P20/52
Inventor 张新荣王路存高敏曹勇戴维林范康年
Owner FUDAN UNIV