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Method for preparing molasses-base hydrothermal carbon

A technology of hydrothermal charcoal and molasses, applied in the direction of carbon preparation/purification, etc., can solve the problems of poor electrical performance of hydrothermal charcoal, corrosion of reaction equipment, environmental pollution of molasses, etc., to promote the separation of charcoal layers and improve the transfer of electrons The effect of ability, reaction process and ease

Inactive Publication Date: 2018-03-16
雷春生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention: molasses is refractory and easy to cause environmental pollution, and the activator used in the preparation of hydrothermal charcoal may cause toxicity in the application of food and medicine fields, which will corrode the reaction equipment, and the reaction is violent and difficult to control , the problem of poor electrical properties of the prepared hydrothermal charcoal, a preparation method of molasses-based hydrothermal charcoal is provided

Method used

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  • Method for preparing molasses-base hydrothermal carbon

Examples

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Effect test

example 1

[0023] Take 10g of molasses, add 50mL of deionized water, stir at 300r / min for 20min, then add 1g of L-cysteine, 2g of ammonia water with a mass fraction of 20%, 2g of ethyl orthosilicate, and continue stirring at 30°C for 4h , to obtain a reaction solution, put the reaction solution into a hydrothermal reaction kettle, heat to 160°C for 12h, then heat to 200°C for 20h, cool to room temperature, take out and filter to obtain filter residue, alternately wash with deionized water and absolute ethanol Until the washing solution is neutral, place it in a drying oven and dry at 80°C for 3 hours to obtain a carbon material precursor. Take 1g of the carbon material precursor, soak it in 100g of a 10% potassium carbonate solution by mass fraction, and dry it at 70°C Stir at 300r / min for 4h, filter the filter cake, wash with deionized water until the washing liquid is neutral, place in a drying oven, dry at 80°C for 3h, and then put it into a muffle furnace, under a nitrogen atmosphere ...

example 2

[0025] Take 15g of molasses, add 75mL of deionized water, stir at 350r / min for 25min, then add 1g of L-cysteine, 3g of ammonia water with a mass fraction of 20%, 3g of ethyl orthosilicate, and continue stirring at 35°C for 5h , to obtain a reaction solution, put the reaction solution into a hydrothermal reaction kettle, heat to 170°C for 14h, then heat to 220°C for 25h, cool to room temperature, take out and filter to obtain filter residue, alternately wash with deionized water and absolute ethanol Until the washing solution is neutral, place it in a drying oven and dry at 85°C for 4 hours to obtain a carbon material precursor. Take 1g of the carbon material precursor, soak it in 150g of a 10% potassium carbonate solution, and heat it at 75°C Stir at 350r / min for 5h, filter the filter cake, wash with deionized water until the washing liquid is neutral, place in a drying oven, dry at 85°C for 4h, and then put it into a muffle furnace, under nitrogen atmosphere , heated to 550°C...

example 3

[0027] Take 20g of molasses, add 100mL of deionized water, stir at 400r / min for 30min, then add 2g of L-cysteine, 4g of 20% ammonia by mass fraction, 4g of ethyl orthosilicate, and continue stirring at 40°C for 6h , to obtain a reaction solution, put the reaction solution into a hydrothermal reaction kettle, heat to 180°C for 16h, then heat to 240°C for 30h, cool to room temperature, take out and filter to obtain filter residue, alternately wash with deionized water and absolute ethanol Until the washing solution is neutral, place it in a drying oven and dry at 90°C for 5 hours to obtain a carbon material precursor. Take 2g of the carbon material precursor, soak it in 200g of a 10% potassium carbonate solution, and heat it at 80°C Stir at 400r / min for 6h, filter the filter cake, wash with deionized water until the washing liquid is neutral, put it in a drying oven, dry at 90°C for 5h, then put it into a muffle furnace, under a nitrogen atmosphere , heated to 600°C for activati...

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Abstract

The invention relates to a method for preparing molasses-base hydrothermal carbon, and belongs to the technical field of biomass adsorption materials. The method has the advantages that nanometer-sized silicon dioxide particles are used as template agents, L-cysteine is used as a source of heteroatoms N and S, hydrothermal carbon materials with doped elements N and S and large specific surface areas are prepared by the aid of hydrothermal processes and are activated by potassium carbonate under mild activation conditions, hole etching is carried out on the insides of the materials by means ofdiffusion and permeation, carbon layer separation is promoted, reaction procedures are easy to control, equipment can be prevented from being corroded, and the problem of possible toxicity can be solved; the molasses-base hydrothermal carbon prepared by the aid of the method has developed pore structures, porous structures are excellently developed, the molasses-base hydrothermal carbon is of a graphitization stacked structure, and the electron transmission capacity of the materials can be improved; the surfaces of the molasses-base hydrothermal carbon contain active groups such as -NH2 and -SH, and the molasses-base hydrothermal carbon is good in surface activity and heat stability and excellent in electric double-layer energy storage performance.

Description

technical field [0001] The invention relates to a preparation method of molasses-based hydrothermal charcoal, belonging to the technical field of biomass adsorption materials. Background technique [0002] Hydrothermal carbonization has low reaction temperature, raw materials are not limited by moisture content, less energy consumption, CO 2 It is an efficient means of biomass pretreatment and a method of biomass full-component conversion. Biomass raw materials such as straw and wood have the characteristics of wide sources, high yield, and low effective utilization rate. Therefore, it is of great significance to use the hydrothermal carbonization method to process renewable biomass resources such as straw and wood to produce high value-added materials-hydrothermal carbon. [0003] The conversion of biomass to hydrothermal charcoal mainly relies on the activation process. Compared with physical activation, chemical activation has the advantages of simple steps, simultaneo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05
Inventor 陈根旺王之霖史玉兰
Owner 雷春生
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