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Efficient supported bimetallic or polymetallic catalyst and preparation method thereof

A polymetallic catalyst and bimetallic technology, which is applied in the fields of catalysis science and technology and material preparation, can solve problems such as difficulty in scaling up, and achieve the effects of saving equipment costs, improving reaction activity and product selectivity, and being environmentally friendly.

Inactive Publication Date: 2018-12-18
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its plasma treatment is carried out in vacuum, and N 2 , O 2 、H 2 Or inert gas, not easy to scale up

Method used

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  • Efficient supported bimetallic or polymetallic catalyst and preparation method thereof
  • Efficient supported bimetallic or polymetallic catalyst and preparation method thereof
  • Efficient supported bimetallic or polymetallic catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Weigh 3g SiO 2 The carrier was calcined at 500°C for 4h, and 1.7487g of Ni(NO 3 ) 2 ·6H 2 O and 0.8710g of Co(NO 3 ) 2 ·6H 2 O was dissolved in an appropriate amount of deionized water, and the carrier was slowly poured into the solution and stirred evenly, and then stood at room temperature for 12h. Put the equal-volume impregnated precursor into an electric blast drying oven, adjust the temperature to 110°C and dry for 12 hours. Take 1.5g of the dried powder and grind it thoroughly, put it into the plasma reactor for DBD intermittent treatment, increase the voltage to 100V, adjust the current to 3A, keep it for 3min, take it out after fully grinding and cooling, stir evenly for the next treatment , 20 times in total. Finally, it was fired in a muffle furnace at 500 °C for 4 h. The obtained catalyst is labeled as 10Ni-5Co-P / SiO 2 .

Embodiment 2

[0039] Weigh 3g SiO 2 The carrier was calcined at 500°C for 4h, and 1.3990g of Ni(NO 3 ) 2 ·6H 2 O and 1.1466g of Co(NO 3 ) 2 ·6H 2 O was dissolved in an appropriate amount of deionized water, and the carrier was slowly poured into the solution and stirred evenly, and then stood at room temperature for 6h. Put the equal-volume impregnated precursor into an electric blast drying oven, and adjust the temperature to 110 °C for 24 h to dry. Take 1.5g of the dried powder and grind it thoroughly, put it into a plasma reactor for DBD intermittent treatment, increase the voltage to 120V, adjust the current to 3A, keep it for 3min, take it out after fully grinding and cooling, stir evenly for the next treatment , 25 times in total. Finally, it was fired in a muffle furnace at 500 °C for 4 h. The obtained catalyst is labeled as 8Ni-7Co-P / SiO 2 .

Embodiment 3

[0041] Weigh 3g SiO 2 The carrier was calcined at 500°C for 4h, and 1.0493g of Ni(NO 3 ) 2 ·6H 2 O and 1.5688g of Co(NO 3 ) 2 ·6H 2 O was dissolved in an appropriate amount of deionized water, and the carrier was slowly poured into the solution and stirred evenly, and then stood at room temperature for 6h. Put the equal-volume impregnated precursor into an electric blast drying oven, and adjust the temperature to 110 °C for 24 h to dry. Take 1.5g of the dried powder and grind it thoroughly, put it into a plasma reactor for DBD intermittent treatment, increase the voltage to 150V, adjust the current to 3A, keep it for 3min, take it out after fully grinding and cooling, stir evenly for the next treatment , 25 times in total. Finally, it was fired in a muffle furnace at 500 °C for 4 h. The resulting catalyst is labeled 6Ni-9Co-P / SiO 2 .

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Abstract

The invention discloses an efficient supported bimetallic or polymetallic catalyst and a preparation method thereof, the efficient supported bimetallic or polymetallic catalyst is prepared by equivalent-volume impregnation. The method is characterized in that a dielectric barrier discharge plasma technology, as a new green technology operated at low temperature, can change the distribution state of metals in the bimetallic or polymetallic catalyst on a carrier very well, so that a special structure with one or more metals enriched on the surface of the catalyst and other one or more metals enriched in the inner part of the catalyst can be formed. The method can have a positive impact on the surface composition, structure, size and catalytic performance of the catalyst, and can significantly improve the activity, stability and effective product selectivity of the catalyst. The method is suitable for strengthening the preparation of various supported catalysts loaded on different materials. The method using a dielectric barrier discharge plasma for strengthening the preparation of the catalysts has the advantages of short preparation time, low energy consumption and environment friendliness.

Description

technical field [0001] The invention belongs to the field of catalysis science and technology and material preparation, in particular to a method for preparing supported bimetallic or multimetallic catalysts by dielectric barrier discharge plasma enhancement. Background technique [0002] Compared with noble metal catalysts, nickel-based catalysts are cheap, widely sourced, and have high catalytic activity. They have been widely used in methane dry gas reforming, methane partial oxidation, and CO methanation. However, nickel-based catalysts in CO and CH 4 In the system, it is easy to deactivate due to carbon deposition, and it is easy to sinter at high temperature. [0003] Zhang Yi and others reported a method for preparing a uniformly dispersed bimetallic catalyst in a patent application (patent publication number: CN107537513A), which has the advantage of loading the active components on the carrier separately so that their loading positions do not cover each other , so...

Claims

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Application Information

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IPC IPC(8): B01J23/755B01J23/78B01J23/83B01J23/889B01J29/46
CPCB01J23/755B01J23/78B01J23/83B01J23/8892B01J29/46
Inventor 赵彬然刘鹏马苗史浩锋
Owner NORTHWEST UNIV
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