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Supported nickel-cobalt bimetallic nano-catalyst and application thereof in catalyzing selective hydrogenation reaction of vanillin

A bimetallic nano-catalysis technology for vanillin, which is applied in metal/metal oxide/metal hydroxide catalysts, catalyst activation/preparation, physical/chemical process catalysts, etc. Poor activity and stability, etc., to achieve the effect of novel and unique structure, prevent dissolution, and improve stability

Active Publication Date: 2021-07-13
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It solves the problems of weak force between metal and support, poor catalyst activity and stability in traditional supported catalysts, and has broad application prospects

Method used

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  • Supported nickel-cobalt bimetallic nano-catalyst and application thereof in catalyzing selective hydrogenation reaction of vanillin
  • Supported nickel-cobalt bimetallic nano-catalyst and application thereof in catalyzing selective hydrogenation reaction of vanillin
  • Supported nickel-cobalt bimetallic nano-catalyst and application thereof in catalyzing selective hydrogenation reaction of vanillin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1) 2.91g of Co(NO 3 ) 2 ·6H 2 0. The 2-methylimidazole of 3.28g is dissolved in the anhydrous methanol of 50ml respectively, the two are mixed, vigorously stirred for 10 minutes, then left to stand for 24 hours, the precipitate obtained is collected, washed three times with ethanol, and finally in Vacuum drying at 80°C overnight to obtain MOF;

[0018] 2) Disperse 0.4g of MOF synthesized in 15ml of ethanol, ultrasonically disperse for 10 minutes, and add 1.6g of Ni(NO 3 ) 2 ·6H 2 O was dissolved in 15ml of ethanol, and then added dropwise to the MOF dispersion, then stirred at room temperature for 1 hour, washed by centrifugation with absolute ethanol, dried in a 70-degree oven overnight, and finally heated at 750°C under N 2 Roasting in the atmosphere for 3h;

[0019] 3) Weigh 0.1g of the product of step 2) and place it in the polytetrafluoroethylene liner of the hydrothermal reaction kettle, then add 30ml of ethanol and 0.6g of glucose, and conduct a hydrotherma...

Embodiment 2

[0024] 1) 2.91g of Co(NO 3 ) 2 ·6H 2 0. The 2-methylimidazole of 3.28g is dissolved in the anhydrous methanol of 50ml respectively, the two are mixed, vigorously stirred for 10 minutes, then left to stand for 24 hours, the precipitate obtained is collected, washed three times with ethanol, and finally in Vacuum drying at 80°C overnight to obtain MOF;

[0025] 2) Disperse 0.4g of MOF synthesized in 15ml of ethanol, ultrasonically disperse for 10 minutes, and add 1.0g of Ni(NO 3 ) 2 ·6H 2 O was dissolved in 15ml of ethanol, and then added dropwise to the MOF dispersion, then stirred at room temperature for 1 hour, washed by centrifugation with absolute ethanol, dried in a 70-degree oven overnight, and finally heated at 750°C under N 2 Roasting in the atmosphere for 3h;

[0026]3) Weigh 0.2g of the product of step 2) and place it in the polytetrafluoroethylene liner of the hydrothermal reaction kettle, then add 30ml of ethanol and 0.6g of glucose, and conduct a hydrothermal...

Embodiment 3

[0029] 1) 2.91g of Co(NO 3 ) 2 ·6H 2 0. The 2-methylimidazole of 3.28g is dissolved in the anhydrous methanol of 50ml respectively, the two are mixed, vigorously stirred for 10 minutes, then left to stand for 24 hours, the precipitate obtained is collected, washed three times with ethanol, and finally in Vacuum drying at 80°C overnight to obtain MOF;

[0030] 2) Disperse 0.4g of MOF synthesized in 15ml of ethanol, ultrasonically disperse for 10 minutes, and add 2.1g of Ni(NO 3 ) 2 ·6H 2 O was dissolved in 15ml of ethanol, and then added dropwise to the MOF dispersion, then stirred at room temperature for 1 hour, washed by centrifugation with absolute ethanol, dried in a 70-degree oven overnight, and finally heated at 750°C under N 2 Roasting in the atmosphere for 3h;

[0031] 3) Weigh 0.2g of the product of step 2) and place it in the polytetrafluoroethylene liner of the hydrothermal reaction kettle, then add 30ml of ethanol and 0.6g of glucose, and conduct a hydrotherma...

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Abstract

The invention discloses a supported nickel-cobalt bimetallic nano-catalyst and an application of the supported nickel-cobalt bimetallic nano-catalyst in catalyzing a selective hydrogenation reaction of vanillin. On the basis of a special pore channel structure of MOF, nickel is introduced for structural modulation, then metal is reduced at a high temperature by using a carbon source of the MOF to form a carbon-loaded and coated metal structure, and the alloy is coated with a carbon layer by further combining with glucose carbonization, so that the bimetallic nickel-cobalt alloy nano-catalyst with a double-carbon-layer protection structure is constructed; and the structure can prevent oxidation and dissolution of metal particles, and the stability of the catalyst is greatly improved. The prepared bimetallic nickel-cobalt alloy nano-catalyst is novel and unique in structure, high in stability and high in catalytic activity; and when the bimetallic nickel-cobalt alloy nano-catalyst is applied to a reaction for preparing 2-methoxy-4-methylphenol through selective hydrogenation of vanillin, the conversion rate of vanillin reaches 90-100%, and the selectivity of 2-methoxy-4-methylphenol reaches 90-100%.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a supported nickel-cobalt bimetallic nanometer catalyst and its application in catalyzing the selective hydrogenation reaction of vanillin. Background technique [0002] With the development of society, the demand and consumption of fossil energy are increasing day by day, so it is particularly important to find alternatives to fossil energy. As the only renewable energy source, biomass has attracted much attention. As a biomass derivative, vanillin can be used as bio-oil after catalytic hydrodeoxygenation. Compared with crude oil, bio-oil has a higher oxygen content and a lower H / C value. Therefore, when it is applied to biofuels, it needs to be hydrodeoxygenated by chemical means to reduce the oxygen content so that it can release more oil during combustion. Multi-energy [MUKHERJEE D, SINGURU R, VENKATASWAMY P, et al. J. ACS Omega, 2019, 4:4770-4778.]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J37/08B01J37/10C07C41/18C07C43/23
CPCB01J23/755B01J37/086B01J37/10C07C41/18B01J35/399B01J35/393B01J35/23C07C43/23Y02P30/20
Inventor 李峰赵静文范国利杨兰
Owner BEIJING UNIV OF CHEM TECH
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