Method for preparing magnetic carbon material by activating hydrothermal liquified biochar through CO2 and application of method

A hydrothermal liquefaction and biochar technology is applied in the fields of environmental protection and solid waste resource utilization, which can solve problems such as inconvenient separation, and achieve the effects of low cost, high porosity, and avoiding secondary pollution and resource waste.

Inactive Publication Date: 2016-08-17
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After CO 2 Activated hydrothermal carbon has a good removal effect on organic pollutants in water, but has the disadvantage of inconvenient separation. Therefore, introducing magnetic components into hydrothermal carbon can effectively separate and recover carbon materials

Method used

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  • Method for preparing magnetic carbon material by activating hydrothermal liquified biochar through CO2 and application of method
  • Method for preparing magnetic carbon material by activating hydrothermal liquified biochar through CO2 and application of method

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Sieve dry Salix salix liquefaction biochar at 260°C with 20 meshes; add the sieved material into ferric chloride solution and soak for 12 hours, and filter, wherein the mass ratio of material to ferric chloride is 1:3.7 , the concentration of ferric chloride is 50 g / L. The impregnated material was dried in air at 80 °C for 4 h. The dried material was placed in a porcelain boat and placed in a tube-type atmosphere furnace under CO 2 Under atmosphere, the temperature was increased to 700 °C at a rate of 10 °C / min and maintained for 120 min. After the temperature is cooled to room temperature, take it out, wash with water, dry, and grind through a 100-mesh sieve to obtain the magnetic carbon material MC-1. Measured by the specific surface area measuring instrument, its specific surface area is 565 m 2 / g, the pore volumes of total pores and micropores are 0.31 and 0.21 cm, respectively 3 / g.

Embodiment 2

[0020] Sieve dry Salix salix liquefaction biochar at 260°C with 20 meshes; add the sieved material into ferric chloride solution and soak for 12 hours, and filter, wherein the mass ratio of material to ferric chloride is 1:3.7 , the concentration of ferric chloride is 50 g / L. The impregnated material was dried in air at 80 °C for 4 h. The dried material was placed in a porcelain boat and placed in a tube-type atmosphere furnace under CO 2 Under atmosphere, the temperature was increased to 750 °C at a rate of 10 °C / min and maintained for 120 min. After the temperature is cooled to room temperature, take it out, wash with water, dry, and grind through a 100-mesh sieve to obtain the magnetic carbon material MC-2. Measured by the specific surface area measuring instrument, its specific surface area is 664 m 2 / g, the pore volumes of total pores and micropores are 0.39 and 0.21 cm, respectively 3 / g.

Embodiment 3

[0022] Sieve dry Salix salix liquefaction biochar at 260°C with 20 meshes; add the sieved material into ferric chloride solution and soak for 12 hours, and filter, wherein the mass ratio of material to ferric chloride is 1:3.7 , the concentration of ferric chloride is 50 g / L. The impregnated material was dried in air at 80 °C for 4 h. The dried material was placed in a porcelain boat and placed in a tube-type atmosphere furnace under CO 2 Under atmosphere, the temperature was increased to 750 °C at a rate of 10 °C / min and maintained for 60 min. After the temperature is cooled to room temperature, take it out, wash it with water, dry it, and grind it through a 100-mesh sieve to obtain the magnetic carbon material MC-3. Measured by the specific surface area measuring instrument, its specific surface area is 402 m 2 / g, the pore volumes of total pores and micropores are 0.20 and 0.16 cm, respectively 3 / g.

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Abstract

The invention relates to a method for preparing magnetic carbon material by activating hydrothermal liquified biochar through CO2 and application of the method, belonging to the field of environment protection and resource utilization of solid wastes. The method comprises the following steps: 1, impregnating hydrothermal charcoal and ferric salt, and drying in the air; 2, performing pyrolysis on the dried material in a tubular atmosphere furnace in a CO2 atmosphere, taking out the material, washing the material with water, and drying the material to obtain a magnetic charcoal material; and 3, removing organic pollutants from a water body by the magnetic charcoal material. The method is simple, the cost is low, and magnetic charcoal has good magnetism and is easy to separate and free of secondary pollution. The method can be used for effectively reducing the content of CO2 in the atmosphere and alleviating the greenhouse effect, and provides an effective utilization way for waste hydrothermal liquified biochar.

Description

technical field [0001] The invention belongs to the field of environmental protection and resource utilization of solid waste, and specifically relates to the resource utilization of hydrothermally liquefied biochar, in particular to using hydrothermally liquefied biochar as raw material to utilize CO 2 A method for preparing a magnetic carbon material in an activated manner and its application. Background technique [0002] With the development of society and economy, the demand for energy continues to grow, and the non-renewable energy represented by coal and oil is becoming increasingly exhausted, and the environmental problems caused by large-scale use are becoming more and more serious. Therefore, the development of new green energy is imminent. Among them, biomass is rich in resources, diverse in raw materials, has the advantages of zero carbon dioxide emission, low cost, and renewable, and has attracted more and more attention from the society. Biomass hydrothermal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28
CPCB01J20/20B01J20/28009C02F1/283Y02C20/40
Inventor 张士成朱向东钱峰刘雨辰陈建民
Owner FUDAN UNIV
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