Catalyst for vehicle mounted methanol steam reform hydrogen production plant

A methanol steam, reforming hydrogen production technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the long start-up time and heat loss of fuel cell electric vehicles Large and other problems, to achieve good reaction stability, low price, easy to obtain the effect

Inactive Publication Date: 2004-11-03
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to maintain a high reactivity, this type of catalyst needs to be operated at a relatively high reaction tempe...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Weigh 14.1g of copper nitrate, 7.0g of zinc nitrate, 2.9g of zirconium nitrate, and 4.3g of aluminum nitrate, and dissolve them with an appropriate amount of distilled water to obtain solution 1; prepare 0.6M sodium carbonate solution as solution 2. Solution 1 and solution 2 were dripped into the sedimentation tank at the same speed and at the same time under vigorous stirring. 50ml of distilled water was added to the tank in advance. During the precipitation process, the temperature was controlled at 70°C and the pH value was controlled at 9. After the precipitation is complete, it is aged for 3 hours, washed until neutral, dried, and calcined at 450° C. for 6 hours to obtain a CuZnZrAlO catalyst with a mass percentage of Cu of 60%.

[0016] Get 0.2g of the 20-40 mesh catalyst prepared in this example, then take the same particle size quartz sand and mix it evenly, then put it into the constant temperature section of the quartz reaction tube with an inner diameter of 7m...

Embodiment 2

[0018] Weigh 9.83g of copper nitrate, 8.81g of zinc nitrate, 7.60g of zirconium nitrate, and 4.49g of aluminum nitrate, and dissolve them with an appropriate amount of distilled water to obtain solution 1; prepare 1.2M sodium carbonate solution as solution 2. The solution 1 and the solution 2 were dripped into the precipitation tank under vigorous stirring, and the temperature was controlled at 80°C and the pH value was controlled at 7 during the precipitation process. After the precipitation is complete, it is aged for about 5 hours, washed, dried, and calcined at 600°C for 3 hours to obtain a CuZnZrAlO catalyst with a copper mass percentage of 40%.

[0019] Get 0.5g of the 20-40 mesh catalyst prepared in this example, adopt the same experimental device and catalyst reduction method as in Example 1, at a reaction temperature of 250°C, normal pressure, water / methanol molar ratio=1.0:1, WHSV=2.97h -1 The reaction is carried out under the conditions, the conversion rate of metha...

Embodiment 3

[0021] Weigh 4.32g of copper nitrate, 18.18g of zinc nitrate, 0.48g of cerium nitrate, and 2.14g of aluminum nitrate, and dissolve them with an appropriate amount of distilled water to obtain solution 1; prepare 0.8M sodium carbonate solution as solution 2. The solution 1 and the solution 2 were dripped into the precipitation tank under vigorous stirring, and the temperature was controlled at 60°C and the pH value was controlled at 8 during the precipitation process. After the precipitation is complete, it is aged for about 2 hours, washed, dried, and calcined at 400°C for 8 hours to obtain a CuZnCeAlO catalyst with a copper mass percentage of 20%.

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PUM

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Abstract

The catalyst consists of main active component CuO, assistant active components ZnO and oxide of Ce or Zr, and carrier Al2O3. The preparation process of the catalyst includes reaction of the nitrate solution and carbonate solution containing the catalyst components at 60-90 deg.c and pH 7-9; dropping the reaction product into co-precipitator to produce precipitate; and ageing for 2-5 hr, washing, drying, roasting at 300-700 deg.c for 3-8 hr. The produced catalyst has high activity at low temperature, high selectivity, excellent stability, high efficiency and low cost, and is used in vehicular methane reformer of fuel cell vehicle.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a vehicle-mounted methanol steam reforming hydrogen production catalyst. The invention also relates to a preparation method of the catalyst. Background technique [0002] Compared with traditional internal combustion engine vehicles, high-efficiency "zero-emission" fuel cell electric vehicles are listed as the first of the top ten high-tech technologies in the 21st century by the US "Time" due to their advantages in environmental protection and energy saving, and they are the future of the automotive industry . The proton exchange membrane fuel cell (PEMFC) electric vehicle, which uses methanol as fuel to produce hydrogen through an on-board methanol reformer, is currently considered by experts from all over the world to be one of the fuel cell electric vehicle solutions most likely to be put into commercial application. [0003] At present, the catalysts used...

Claims

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Application Information

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IPC IPC(8): B01J23/76B01J37/02C01B3/32
Inventor 董新法林维明
Owner SOUTH CHINA UNIV OF TECH
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