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A kind of preparation method of nickel-magnesium solid solution catalyst

A solid solution and catalyst technology, applied in the field of preparation of nickel-magnesium solid solution catalyst, can solve problems such as scarcity, and achieve the effects of wide temperature window, high catalytic activity and good stability

Active Publication Date: 2021-07-20
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For nickel-magnesium solid solution catalysts, there are very few reports in the past, and there are no reports about the flaky nickel-magnesium solid solution rich in hydroxyl groups at home and abroad.

Method used

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  • A kind of preparation method of nickel-magnesium solid solution catalyst
  • A kind of preparation method of nickel-magnesium solid solution catalyst
  • A kind of preparation method of nickel-magnesium solid solution catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1 preparation sample #1 nickel-magnesium molar ratio is 1:0.5 flake nickel-magnesium solid solution catalyst carrier

[0032] Dissolve 10mmol of magnesium chloride hexahydrate in 100ml of distilled water and stir to dissolve, then add dropwise 10ml of NaOH solution (concentration is 2mol / L) and stir for 15 minutes, then continue to add 10mmol of nickel chloride hexahydrate to the solution, stir and dissolve, then pour into the solution Add 10ml of NaOH solution dropwise and continue to stir for 1h, let stand for a while, wash with a large amount of distilled water, filter with suction, dry at 60°C overnight to obtain a light green precursor, grind the precursor evenly, and roast at 500°C 5h, the heating rate was 2°C / min to obtain the final black powder sample. The catalytic reaction conditions are: the temperature range of the catalytic reaction: 30-240°C, the pressure is 0.2Mpa, and the reaction space velocity is 80000h -1 , gas composition: CO: 1%, O 2 :1...

Embodiment 2

[0033] Embodiment 2 preparation sample #2 nickel-magnesium molar ratio is the plate-shaped nickel-magnesium solid solution catalyst carrier of 0.8:0.2

[0034] Dissolve 2mmol of magnesium chloride hexahydrate in 100ml of distilled water and stir to dissolve, then add dropwise 10ml of NaOH solution (concentration is 2mol / L) and stir for 15 minutes, then continue to add 10mmol of nickel chloride hexahydrate to the solution, stir and dissolve, then pour into the solution Add 10ml of NaOH solution dropwise and continue to stir for 1h, let stand for a while, wash with a large amount of distilled water, filter with suction, dry at 60°C overnight to obtain a light green precursor, grind the precursor evenly, and roast at 500°C 5h, the final black powder sample with a heating rate of 2°C / min. The catalytic reaction conditions are: the temperature range of the catalytic reaction: 30-240°C, the pressure is 0.2Mpa, and the reaction space velocity is 80000h -1 , gas composition: CO: 1%, ...

Embodiment 3

[0035] Embodiment 3 preparation nickel-magnesium molar ratio is the flaky nickel-magnesium solid solution catalyst support of 0.7:0.3

[0036] Dissolve 4mmol of magnesium chloride hexahydrate in 100ml of distilled water, stir and dissolve, then add dropwise 10ml of NaOH solution (concentration is 2mol / L) and stir for 15 minutes, then continue to add 10mmol of nickel chloride hexahydrate to the solution, stir and dissolve, then pour into the solution Add 10ml of NaOH solution dropwise and continue to stir for 1h, let stand for a while, wash with a large amount of distilled water, filter with suction, dry at 60°C overnight to obtain a light green precursor, grind the precursor evenly, and roast at 500°C 5h, the final black powder sample with a heating rate of 2°C / min. The catalytic reaction conditions are: temperature range of catalytic reaction: 30-240°C, pressure 0.2Mpa, reaction space velocity 80000h-1, gas components: CO: 1%, O 2 :1.25%, H 2 : 50%, He balance. The flaky n...

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Abstract

The invention provides a method for preparing a nickel-magnesium solid solution catalyst. The flaky nano-nickel-magnesium solid solution is mixed with each other through different nickel-magnesium ratios, and the size is 20-40nm. The specific preparation method includes the steps: at room temperature, the metal precursor magnesium The salt is completely dissolved in distilled water and precipitated by lye, and then continue to add metal nickel salt for further precipitation. After fully stirring evenly, let it stand for a period of time, wash with a large amount of water, and dry to obtain a flaky nickel-magnesium solid solution catalyst. The obtained precursor was calcined at 450-550° C. for 3-8 hours to obtain a flaky nickel-magnesium solid solution catalyst with stable morphology. The invention has good dispersibility, controllable components, simple method, easy operation, good stability as a carrier, very good catalytic activity for preferential oxidation of carbon monoxide, wide temperature operating window and excellent catalytic stability and durability.

Description

technical field [0001] The invention relates to the field related to the synthesis of carbon monoxide preferential oxidation materials and the synthesis of noble metal-loaded nickel-magnesium solid solution catalysts, in particular to a preparation method for nickel-magnesium solid solution catalysts for carbon monoxide preferential oxidation. Background technique [0002] With the rapid development of hybrid vehicles and renewable energy, the development of mobile, efficient, and pollution-free power sources has become the focus of attention in the world. Due to the advantages of high energy conversion efficiency, environmental friendliness, and fast start-up at low temperature, fuel cells have attracted widespread attention. Among them, the proton exchange membrane fuel cell (PEMFC) is considered to be the most potential energy conversion and storage device due to its high energy density, long working life, good low-temperature start-up performance, and low operating tempe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/00B01J23/755H01M4/90H01M4/88
CPCB01J23/002B01J23/755H01M4/8825H01M4/9041Y02E60/50
Inventor 李广社李慧霞李莉萍
Owner JILIN UNIV
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