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A kind of cobalt nitrogen co-doped fish scale biochar catalyst and its preparation method and application

A biochar and catalyst technology is applied in the field of cobalt-nitrogen co-doped fish scale biochar catalyst and preparation thereof, and the catalytic hydrogenation of levulinic acid to prepare γ-valerolactone, which can solve the problems of difficult industrialized production, corrosion of reaction equipment, and process problems. Complexity and other problems, to achieve the effects of enhanced dispersion, large mitigation, and high catalytic conversion rate

Active Publication Date: 2022-05-17
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is worth mentioning that the process of using acid / alkali / salt activators to treat fish scales to prepare carbon materials is relatively complicated and requires pickling and post-treatment to obtain carbon materials, and the activators present during high-temperature carbonization will also corrode the reaction equipment. , so it is difficult to achieve industrial production

Method used

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  • A kind of cobalt nitrogen co-doped fish scale biochar catalyst and its preparation method and application
  • A kind of cobalt nitrogen co-doped fish scale biochar catalyst and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0027] After the fish scales are washed, dry them at 80°C and grind them into powder, weigh 10g of fish scale powder and 60mL of water for ultrasonic treatment, put them in a polytetrafluoroethylene reactor for hydrothermal carbonization at 200°C for 12 hours, and dry them to obtain fish scale biochar; weigh 4g Dissolve cobalt nitrate in 40mL of ethanol, slowly add ethylenediamine dropwise during stirring until the solution becomes a paste, dry the paste at 80°C to obtain brown-yellow ethylenediamine cobalt; weigh 1g fish scale biochar, 2g melamine and 1.2337g ethylenediamine cobalt were ground in an agate mortar evenly, and then the mixture was heated at 700°C and N 2 Pyrolysis under atmosphere for 2h (heating rate 4°C / min), take out after natural cooling to obtain cobalt nitrogen co-doped carbon catalyst. The specific surface area of ​​the catalyst determined by nitrogen adsorption is 430m 2 / g, the elemental analysis determined that the nitrogen doping amount in the cataly...

Embodiment 2

[0030] After the fish scales are washed, dry them at 80°C and grind them into powder, weigh 10g of fish scale powder and 60mL of water for ultrasonic treatment, put them in a polytetrafluoroethylene reactor for hydrothermal carbonization at 200°C for 12 hours, and dry them to obtain fish scale biochar; weigh 4g Dissolve cobalt nitrate in 40mL of ethanol, slowly add ethylenediamine dropwise during stirring until the solution becomes a paste, dry the paste at 80°C to obtain brown-yellow ethylenediamine cobalt; weigh 1g fish scale biochar, 2g melamine and 1.2337g of ethylenediamine cobalt were ground in an agate mortar evenly, and then the mixture was heated at 800°C and N 2 Pyrolysis under atmosphere for 2h (heating rate 4°C / min), take out after natural cooling to obtain cobalt nitrogen co-doped carbon catalyst. The specific surface area of ​​the catalyst determined by nitrogen adsorption is 380m 2 / g, elemental analysis determined that the nitrogen doping amount in the catalys...

Embodiment 3

[0033] After the fish scales are washed, dry them at 80°C and grind them into powder, weigh 10g of fish scale powder and 60mL of water for ultrasonic treatment, put them in a polytetrafluoroethylene reactor for hydrothermal carbonization at 200°C for 12 hours, and dry them to obtain fish scale biochar; weigh 4g Dissolve cobalt nitrate in 40mL of ethanol, slowly add ethylenediamine dropwise during stirring until the solution becomes a paste, dry the paste at 80°C to obtain brown-yellow ethylenediamine cobalt; weigh 1g fish scale biochar, 2g melamine and 1.2337g ethylenediamine cobalt were ground in an agate mortar evenly, and then the mixture was heated at 700°C and N 2 Pyrolysis under atmosphere for 2h (heating rate 4°C / min), take out after natural cooling to obtain cobalt nitrogen co-doped carbon catalyst. The specific surface area of ​​the catalyst determined by nitrogen adsorption is 430m 2 / g, the elemental analysis determined that the nitrogen doping amount in the cataly...

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Abstract

The invention discloses a cobalt nitrogen co-doped fish scale biochar catalyst, a preparation method and application thereof. Cobalt nitrogen co-doped fish scale biochar was obtained by pretreatment and hydrothermal carbonization reaction of fish scale waste as the starting material to obtain carbon precursors, chelating agent with ethylenediamine as metal cobalt source combined with melamine at high temperature for the next step pyrolysis catalyst. The obtained catalyst has a large number of tubular structures, rich in mesopores and macropores, and a specific surface area of ​​240-400m 2 / g, the doping amount of nitrogen is 3-8wt.%, and the doping amount of cobalt is 1-5wt.%. The cobalt-nitrogen co-doped carbon catalyst prepared from fish scales in the present invention is applied in the reaction of preparing γ-valerolactone by catalytic hydrogenation of levulinic acid, and has high efficiency, high yield and good cycle stability, and the present invention The preparation method is simple, and the environmentally unfriendly process without any acid-base post-treatment provides a new way for high-value recycling of fish scale waste.

Description

technical field [0001] The invention belongs to the technical field of new chemical materials, and in particular relates to a cobalt-nitrogen co-doped fish scale biochar catalyst and a preparation method thereof, and a technology of applying the catalyst to levulinic acid catalytic hydrogenation to prepare gamma-valerolactone. Background technique [0002] γ-valerolactone (GVL), as a value-added chemical synthesized from renewable raw materials such as biomass waste and food waste, is non-toxic and biodegradable, can be used as a food additive, and can also be used as a Green solvent and effective fuel additive. GVL can also be converted into various derivatives such as methyl tetrahydrofuran, alkanes, and 1,4-pentanediol. GVL is a key derivative of levulinic acid (LA), which can generally be obtained by catalytic hydrogenation of LA and its derivatives. LA, which in turn can be formed by acid catalysis of cellulose or C6 sugars and involves the production of hydroxymethyl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J35/10B01J37/10B01J37/08C07D307/33
CPCB01J27/24B01J37/10B01J37/082B01J37/086B01J37/084C07D307/33B01J35/393B01J35/615Y02P20/584
Inventor 蔡进军岳亮宏魏俊王丁伟
Owner XIANGTAN UNIV
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