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Modified biochar material, preparation method and application thereof

A technology of biochar and biomass raw materials, applied in chemical instruments and methods, water pollutants, other chemical processes, etc., can solve the problem of reduced carbon yield and achieve high carbon yield, high specific surface area, and large specific surface area Effect

Inactive Publication Date: 2021-03-09
ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has high requirements for equipment and operation, and the carbon yield will decrease after introducing oxygen.

Method used

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  • Modified biochar material, preparation method and application thereof
  • Modified biochar material, preparation method and application thereof
  • Modified biochar material, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] The invention provides a kind of preparation method of modified biochar material, comprises the following steps:

[0026] impregnating the biomass raw material in an oxygen-containing group donor solution to obtain impregnated biomass;

[0027] The impregnated biomass is sequentially dried and carbonized to obtain the modified biochar material.

[0028] In the present invention, unless otherwise specified, all raw material components are commercially available products well known to those skilled in the art.

[0029] In the invention, the biomass raw material is placed in the oxygen-containing group donor solution for impregnation to obtain the impregnated biomass.

[0030] In the present invention, the particle size of the biomass raw material is preferably 0.05-1 mm, more preferably 0.1-0.5 mm. In the present invention, the biomass raw material includes wood, bamboo, nut shell or straw; the nut shell preferably includes walnut shell or macadamia nut shell. The inve...

Embodiment 1

[0056] Put 5g of walnut shells in 10% H 2 o 2 In the solution, ultrasonically impregnate at 25°C and 800W for 30 minutes to obtain impregnated walnut shells, place the impregnated walnut shells in an oven and dry at 65°C for 480 minutes, and then place them in a tube furnace at 300°C, N 2 Carbonize in the atmosphere for 120min to obtain a modified biochar material.

Embodiment 2～4

[0058] Prepare the modified biochar material according to the method of Example 1, the preparation conditions of Examples 1 to 4, the structural characterization results of the obtained modified biochar material and the effect on Pb 2+ The adsorption test results are shown in Table 1.

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PUM

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Abstract

The invention provides a modified charcoal material, a preparation method and application thereof, and belongs to the technical field of charcoal materials. The preparation method of the modified biochar material comprises the following steps: putting a biomass raw material into an oxygen-containing group donor solution for impregnation to obtain impregnated biomass, and sequentially drying and carbonizing the impregnated biomass to obtain the modified charcoal material, alternatively, the method comprises the following steps: placing a carbonized biomass raw material in an oxygen-containing group donor solution for impregnation to obtain impregnated carbonized biomass, and drying the impregnated and carbonized biomass to obtain the modified charcoal material. According to the preparationmethod provided by the invention, the oxygen-containing group donor is oxidized to generate the oxygen-containing group on the surface of the biochar, the process is simple, the energy consumption islow, the cost is low, and the method is suitable for industrial production; and the prepared modified charcoal material is high in charcoal yield, rich in oxygen-containing groups, large in specific surface area and excellent in heavy metal adsorption effect.

Description

technical field [0001] The invention relates to the technical field of carbon materials, in particular to a modified biochar material and its preparation method and application. Background technique [0002] Water heavy metal ion pollution refers to the pollution of water bodies caused by pollutants containing heavy metal ions entering water bodies. The heavy metal wastewater produced in industrial production processes such as mining, machinery manufacturing, chemical industry, electronics, and instrumentation contains heavy metal ions such as chromium, cadmium, copper, mercury, nickel, and zinc. If the sludge and wastewater containing heavy metal ions are used as fertilizers and irrigated farmland, the soil will be polluted, resulting in the accumulation of heavy metal ions in the crops and aquatic organisms after entering the water body, and causing serious harm to the human body through the food chain. Therefore, the elimination of heavy metal pollution in water has alwa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/20
CPCB01J20/20C02F1/281C02F2101/20
Inventor 刘万鹏杨烨张羡单胜道
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY