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Foamed metal aluminum surface modification catalyst carrier, preparation method of the carrier, and method for preparing alcohol type reforming catalysts by utilizing carrier

A technology for catalyst support and reforming catalyst, which is applied in the direction of catalyst support, metal/metal oxide/metal hydroxide catalyst, chemical instruments and methods, etc., can solve the problems of low catalyst utilization and insufficient contact, and achieve catalyst The effect of improving the utilization rate, enhancing the binding force, and increasing the contact area

Active Publication Date: 2014-06-11
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a metal aluminum foam surface modified catalyst carrier and its preparation method and a method for preparing an alcohol reforming catalyst using the carrier, which can effectively solve the problem of insufficient contact between the reaction gas and the catalyst in the existing methanol reformer , low utilization rate of the catalyst and the negative impact of the catalyst skeleton on the catalyst, etc., and to some extent reduce the production of carbon monoxide

Method used

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  • Foamed metal aluminum surface modification catalyst carrier, preparation method of the carrier, and method for preparing alcohol type reforming catalysts by utilizing carrier

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Effect test

Embodiment 1

[0024] Put the porous aluminum foam in the working solution composed of 5-15g / L sodium aluminate and 0.5-2g / L sodium hypophosphite, use the foamed aluminum as the positive electrode, and the working tank as the negative electrode, and use a DC power supply at 300- 600V voltage, 5-20A / dm 2 Treat for 30-120 minutes under the condition of constant current density.

[0025] The surface-modified aluminum foam is immersed in the Cu-based catalyst precursor, which is prepared from copper nitrate trihydrate, zinc nitrate hexahydrate, and aluminum nitrate nonahydrate, Cu:Zn:Al=11:4 :2 (atomic ratio) of nitrate solution in which Cu 2+ The concentration is 4.6wt%. After surface modification, there is a layer of loose and porous alumina on the surface of aluminum foam. Calcined in a nitrogen atmosphere for 2 hours, so that the nitrate is decomposed into a basic salt and then further decomposed to form an oxide. The final unit area loading is 17.9mg / cm2. 2 (25%, v%)N 2 In the atmospher...

Embodiment 2

[0027] The difference between this embodiment and embodiment 1 is that the aforementioned catalyst precursor uses 11.7wt% Na 2 CO 3 Precipitate at 65-70°C and maintain a pH of about 8.5, then age at the same temperature for 2 hours, filter and wash to obtain a precipitate, and disperse the precipitate in distilled water to obtain a 3wt% suspension to replace the catalyst precursor solution , in which the surface-modified aluminum foam is immersed.

Embodiment 3

[0029] The difference between this embodiment and Embodiment 1 is that an AC power source is used for the micro-arc oxidation power source, and the peak current density of the forward pulse is 5-30A / dm 2 , The peak current density of the negative pulse is 0-20 A / dm 2 , The working frequency is 10-3000Hz, and the processing time is 20-120min.

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Abstract

The invention discloses a foamed metal aluminum surface modification catalyst carrier, a preparation method of the carrier, and a method for preparing alcohol type reforming catalysts by utilizing the carrier. The carrier is prepared from a foamed metal aluminum framework and a porous oxide ceramic membrane growing by modification on the surface of the framework. The method comprises the following steps: putting porous foamed aluminum as a positive pole into an electrolyte containing 5-20g of aluminate, silicate and fluorozirconate per milliliter, and applying direct or alternating voltages to perform microarc oxidation, thereby forming a layer of oxidized ceramic membrane, and carrying the catalyst on the surface of the ceramic membrane as a substrate, thereby obtaining the alcohol type reforming catalysts. The problems such as insufficient contact of reaction gas with the catalyst, low utilization rate of the catalyst, and the negative effects of the catalyst framework on the catalyst in the existing methyl alcohol reformer can be effective solved and the generation of carbon monoxide is reduced to a certain degree.

Description

technical field [0001] The invention belongs to the field of proton exchange ceramic membrane fuel cell fuel, and relates to a methanol reforming catalyst carrier, a preparation method thereof, and a method for preparing an alcohol reforming catalyst using the carrier. Background technique [0002] Fuel cells can efficiently and environmentally friendly convert chemical energy stored in fuels into electrical energy. Hydrogen is the best fuel for fuel cells. At present, large companies related to automobiles and energy in developed countries are accelerating the development of fuel cells. To realize the commercialization of proton exchange ceramic membrane fuel cells (PEMFC), the problem of hydrogen source and cost reduction need to be solved. Because there are still many technical difficulties in hydrogen storage, transportation, distribution and filling, it cannot meet the needs of fuel cells of all sizes for decentralized hydrogen sources. Hydrogen-rich fuels such as alc...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J23/80C01B3/32H01M4/90
CPCY02E60/50
Inventor 张雪林赵洋张宇峰刘晓为
Owner HARBIN INST OF TECH
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