Copper base catalyst in use for preparing hydrogen by reforming vapor of methanol and preparation method

A copper-based catalyst, reforming hydrogen production technology, applied in the chemical industry, can solve the problems of inability to meet the hydrogen production demand of vehicle fuel cells and high carbon monoxide content in reformed gas

Inactive Publication Date: 2005-01-12
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] 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 above-mentioned nitrate solution and sodium carbonate solution were dripped into the 100mL aqueous solution preset with 0.16g SBA-15 (400-600 mesh), the solution temperature was controlled at 60°C, and the pH was 7.0- 7.2. After the reaction, continue to stir for 4 hours, then wash with deionized water, fully beat, filter, and finally dry at 110°C for 12 hours, and roast at 360°C for 4 hours under the protection of nitrogen to prepare the precursor of the catalyst in the oxidation state. Cu / Zn in the sample / Al=45 / 45 / 10 (molar ratio), the weight content of SBA-15 in the catalyst oxidation state precursor is 3wt%.

Embodiment 2

[0018] 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 0.3M solution and mixed, and then 7.42g of AR grade anhydrous Na 2 CO 3 Prepared as a 0.3M solution. Then, under strong stirring conditions, the above-mentioned nitrate solution and sodium carbonate solution were dripped into 100mL aqueous solution preset with 0.27g SBA-15, the solution temperature was controlled at 30°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 120°C for 12 hours, and bake at 300°C for 5 hours under the protection of nitrogen atmosphere to prepare the precursor of the catalyst in an oxidized state. Cu in the sample / Zn / Al=45 / 45 / 10 (molar ratio), the weight content of SBA-15 in the catalyst oxidation state precursor is 5wt%. Catalyst activity evaluation is the same as embodiment 1, and test result shows: at normal pressure, lo...

Embodiment 3

[0020] 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 0.5M solution and mixed, and then 7.42g of AR grade anhydrous Na 2 CO 3 Prepared as a 0.5M solution. Then, under strong stirring conditions, the above-mentioned nitrate solution and sodium carbonate solution were dripped into 100mL aqueous solution preset with 0.45g SBA-15, the solution temperature was controlled at 80°C, and the pH was 7.0-7.2. After the reaction, continue to stir for 4 hours, then wash with deionized water, fully beat, filter, and finally dry at 100°C for 12 hours, and roast at 250°C for 5 hours under the protection of nitrogen to prepare the catalyst oxidation state precursor. Cu / Zn in the sample / Al=45 / 45 / 10 (mass ratio), the weight content of SBA-15 in the catalyst oxidation state precursor is 8wt%. Catalyst activity evaluation is the same as embodiment 1, and test result shows: at normal pressure, low temperature 230 ℃, n...

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Abstract

A Cu-base catalyst for preparing hydrogen by water vapour reforming to methanol is composed of the active component (CuO / ZnO / Al2O3 and the silicon oxide-base mesoporous material. Its preparing process includes quantitatively adding mesoporous silicon oxide to reactor, simultaniously dropping the solution of nitrate and the solution of sodium carbonate in the reactor while stirring, depositing reaction, washing, drying and calcining. Its advantages are unique large surface area and porous structure, and high low-temp activity and selectivity.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a novel copper-based catalyst for hydrogen production by steam reforming of methanol and a preparation method thereof. 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 technical 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 Both CO and CO content have relatively strict requirements, especially for CO content...

Claims

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Application Information

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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
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