Method for preparing porous carbon material by utilizing water hyacinth, and application

A technology of porous carbon materials and water hyacinth, applied in chemical instruments and methods, carbon compounds, water/sewage treatment, etc., can solve the problems of water body anaerobic environment, low value-added utilization, high salvage cost, etc., and achieve large specific surface area , the effect of rich pore structure

Active Publication Date: 2018-06-05
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the introduction of water hyacinth has significantly improved the water quality, water hyacinth has rapidly multiplied and covered the lake after absorbing a large amount of nitrogen and phosphorus nutrients.
If it is not salvaged in time, a large number of water hyacinths covering the lake will affect the sunlight exposure of the lake and the dissolution of oxygen. Over time, it will cause an anaerobic environment in the water body, the biological community will disappear, and the water quality will deteriorate sharply; and the salvage process is in addition to high salvage costs. In addition, how to deal with the huge amount of water hyacinth waste is also a thorny issue
Existing technologies such as landfill or composting of organic fertilizers and soil improvers are relatively extensive, and the added value of utilization is low

Method used

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  • Method for preparing porous carbon material by utilizing water hyacinth, and application
  • Method for preparing porous carbon material by utilizing water hyacinth, and application
  • Method for preparing porous carbon material by utilizing water hyacinth, and application

Examples

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Embodiment 1

[0029] A kind of method utilizing water hyacinth to prepare porous carbon material, comprises the following steps:

[0030] (1) Pretreatment of water hyacinth: take the stem of water hyacinth, wash it, and air-dry it naturally for 5-6 days, then dry it in an oven at 105°C for 24 hours, then crush the dried stem of water hyacinth with a pulverizer, and dry it for 40 Mesh sieve;

[0031] (2) Hydrothermal treatment: Weigh 6.0 g of water hyacinth powder in step (1), add 60 mL of deionized water into a hydrothermal reaction kettle, and mix well; then place the reaction kettle at a temperature of 200° C. After the reaction, filter and dry to obtain lignite-like biomass hydrothermal carbon;

[0032] (3) Molten salt activation treatment: take 2.0g of hydrothermal carbon obtained in step (2), add 8.0gNa 2 CO 3 -K 2 CO 3 Mix the salt, put it in a corundum porcelain boat after mixing evenly, put it in a tube furnace, and put it in the N 2 Under the protection of gas, calcined at 85...

Embodiment 2

[0035] A kind of method utilizing water hyacinth to prepare porous carbon material, comprises the following steps:

[0036] (1) Pretreatment of water hyacinth: take the stem of water hyacinth, wash it, and air-dry it naturally for 5-6 days, then dry it in an oven at 105°C for 24 hours, then crush the dried stem of water hyacinth with a pulverizer, and dry it for 40 Mesh sieve;

[0037] (2) Hydrothermal treatment: Weigh 6.0g of water hyacinth powder in step (1), add 30mL of deionized water into the hydrothermal reaction kettle, mix well; then place the reaction kettle at 200°C for hydrothermal reaction for 24h , filter and dry after the reaction to obtain lignite-like biomass hydrothermal carbon;

[0038] (3) Molten salt activation treatment: take 2.0g of hydrothermal carbon obtained in step (2), add 8.0gNa 2 CO 3 -K 2 CO 3 Mix the salt, put it in a corundum porcelain boat after mixing evenly, put it in a tube furnace, and put it in the N 2 Under the protection of gas, ca...

Embodiment 3

[0041] A kind of method utilizing water hyacinth to prepare porous carbon material, comprises the following steps:

[0042] (1) Pretreatment of water hyacinth: take the stem of water hyacinth, wash it, and air-dry it naturally for 5-6 days, then dry it in an oven at 105°C for 24 hours, then crush the dried stem of water hyacinth with a pulverizer, and dry it for 40 Mesh sieve;

[0043] (2) Hydrothermal treatment: Weigh 6.0g of water hyacinth powder in step (1), add 60mL of deionized water into the hydrothermal reaction kettle, mix well; then place the reaction kettle at 180°C for hydrothermal reaction for 24h , filter and dry after the reaction to obtain lignite-like biomass hydrothermal carbon;

[0044] (3) Molten salt activation treatment: take 2.0g of hydrothermal carbon obtained in step (2), add 8.0gNa 2 CO 3 -K 2 CO 3 Mix the salt, put it in a corundum porcelain boat after mixing evenly, put it in a tube furnace, and put it in the N 2 Under the protection of gas, ca...

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Abstract

The invention belongs to the technical field of biochar material preparation, and particularly discloses a method for preparing a porous carbon material by utilizing water hyacinth, and application. The method comprises the steps of after washing, drying and smashing a collected water hyacinth biomass, firstly utilizing a hydro-thermal treatment process for degrading and removing degradable hemicellulose and low-molecule weight saccharides in the biomass, and obtaining brown coal-shape hydrothermal carbon with mass macromolecule holes; then utilizing a high temperature molten salt pyrolysis process for further carbonizing and activating the hydrothermal carbon, and further obtaining the porous biochar material with a rich hole structure and rich in surface functional groups. When the biochar prepared through the method is applied to a supercapacitor energy storage material, the biochar shows an excellent specific capacitance performance. In addition, according to the method provided bythe invention, a large amount of aquatic plant water hyacinth is converted into the high-performance biochar material, so that not only is the treatment problem of the water hyacinth biomass solved,but also the waste can be turned into wealth, and the high value-added resources of waste biomasses are transformed and utilized.

Description

technical field [0001] The invention belongs to the technical field of preparation of biological carbon materials, and in particular relates to a method for preparing porous carbon materials by using water hyacinth and the application of the prepared porous carbon materials. Background technique [0002] Water hyacinth, also known as water hyacinth. Because of its rapid growth and strong reproductive ability, it can be used to control the pollution of eutrophic nitrogen and phosphorus in water bodies. However, although the introduction of water hyacinth has significantly improved the water quality, water hyacinth has rapidly multiplied and covered the lake after absorbing a large amount of nitrogen and phosphorus nutrients. The problem of its treatment and disposal has caused troubles for management personnel. If it is not salvaged in time, a large number of water hyacinths covering the lake will affect the sunlight exposure of the lake and the dissolution of oxygen. Over t...

Claims

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Application Information

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IPC IPC(8): C01B32/318C01B32/348H01G11/32H01G11/86B01J20/20B01J20/30C02F1/28
CPCB01J20/20C01P2004/03C01P2006/12C01P2006/40C02F1/283H01G11/32H01G11/86Y02E60/13
Inventor 汤迪勇孙杰杨葆坤雷炜东田文龙陈柯
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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