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Synchronous-pyrolysis iron loaded biochar preparation method

A biochar, pyrolysis technology, applied in the fields of biofuels, chemical instruments and methods, water pollutants, etc., can solve the problems of secondary pollution, increase production costs, etc., achieve rapid growth, increase adsorption capacity, and easily obtain materials. Effect

Inactive Publication Date: 2018-07-24
北京中科乾和环保科技服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with biochar, the biggest difference between activated carbon is that in order to obtain a high specific surface area, it needs to be activated with an activator, and then undergoes steps such as pickling, which will easily cause secondary pollution of the environment and increase the production cost.

Method used

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  • Synchronous-pyrolysis iron loaded biochar preparation method
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  • Synchronous-pyrolysis iron loaded biochar preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Fresh adult 4-year-old bamboo is cut into sections through a cutting machine, each section length is 1-1.5m, rinsed with water for 3 times to remove surface dust, and sieved with a nylon mesh sieve after pulverizing the bamboo to obtain 30 Purpose bamboo powder, and then put it in a ventilated and dry place for natural air-drying.

[0034] Put the bamboo powder in water and stir evenly. In the mixed solution, the ferric chloride content is 0mol / L. The negative pressure suction filtration method is used to realize solid-liquid separation, and the liquid can be reused to obtain solid bamboo powder, which is placed in The pyrolysis raw material was obtained after drying in an oven at 80°C for 24 hours.

[0035] Put the pretreated bamboo into the atmosphere tube furnace, evacuate until the vacuum degree reaches -0.1Mpa, and then pass in the inert gas N 2 , after returning to normal pressure, repeat the vacuuming and ventilation operations once, and return to normal pressur...

Embodiment 2

[0037] Fresh adult 5-year-old bamboo is cut into sections through a cutting machine, each section length is 1-1.5m, rinsed with water 3 times to remove surface dust, and sieved with a nylon mesh sieve after pulverizing the bamboo with a pulverizer to obtain 50 Purpose bamboo powder, and then put it in a ventilated and dry place for natural air-drying.

[0038] Put the bamboo powder in the ferric chloride solution and stir evenly. In the mixed solution, the ferric chloride content is 0.5mol / L. Use the suction filtration method to achieve solid-liquid separation to obtain solid bamboo powder, and put it in an oven at 80°C , and obtained the pyrolysis raw material after drying for 24 hours.

[0039] Put the pretreated bamboo into the atmosphere tube furnace, evacuate until the vacuum degree reaches -0.1Mpa, and then pass in the inert gas N 2 , after returning to normal pressure, repeat the vacuuming and ventilation operations once, and return to normal pressure again. Open the ...

Embodiment 3

[0041] Fresh adult 6-year-old bamboo is cut into sections through a cutting machine, each section length is 1-1.5m, rinsed with water 3 times to remove surface dust, and sieved with a nylon mesh sieve after pulverizing the bamboo with a pulverizer to obtain 80 Purpose bamboo powder, and then put it in a ventilated and dry place for natural air-drying.

[0042] Put the bamboo powder in the ferric chloride solution and stir evenly. In the mixed solution, the ferric chloride content is 2.0mol / L. Use the suction filtration method to achieve solid-liquid separation to obtain solid bamboo powder, and put it in an oven at 80°C , and obtained the pyrolysis raw material after drying for 24 hours.

[0043] Put the pretreated bamboo into the atmosphere tube furnace, evacuate until the vacuum degree reaches -0.1Mpa, and then pass in the inert gas N 2 , after returning to normal pressure, repeat the vacuuming and ventilation operations once, and return to normal pressure again. Open the ...

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Abstract

The invention discloses a synchronous-pyrolysis iron loaded biochar preparation method which comprises the following steps: S1, preparing a biomass raw material, cleaning the biomass raw material andsmashing and sieving to obtain biomass powder; S2, soaking the biomass into an iron containing solution; S3, evenly mixing the biomass powder with the iron containing solution and filtering to achievesolid-liquid separation; S4, pyrolyzing the filtered biomass powder under the anaerobic condition, wherein a pyrolysis temperature is 500 to 700 DEG C, and thermal-insulation time is 1 to 3 hours; S5, smashing and sieving the pyrolyzed biomass powder to obtain the iron loaded biochar. The biochar prepared from the raw material of phyllostachys viridis can be applied to a heavy metal cadmium ion removing process in a water environment, so that the problems that an existing adsorption technology has a poor adsorption effect and secondary pollution in a heavy metal adsorption process are solved;meanwhile, a biochar carbonizing process can seal carbonic acid in biochar, emission of greenhouse gas of carbon dioxide is reduced, and an environmental ecological effect is beneficiated.

Description

technical field [0001] The invention relates to a method for preparing biochar materials, in particular to a method for preparing biochar with synchronous pyrolysis loaded with iron. Background technique [0002] In the process of industrial production, a variety of wastewater containing heavy metal pollution will be produced. Heavy metals are a type of toxic substances that are difficult to biodegrade. After entering natural water bodies, it is difficult to remove them through in-situ repair. At present, the removal of heavy metals in wastewater is mainly based on physical and chemical methods, and bioremediation technology has also received widespread attention as an economical and environmentally friendly treatment technology. Therefore, the feasibility and effectiveness of bioremediation technology will be gradually strengthened, and it has a good application prospect in the treatment and prevention of heavy metal pollution. [0003] At present, activated carbon and org...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C10B53/02C02F101/20
CPCB01J20/06B01J20/20B01J2220/485C02F1/281C02F2101/20C10B53/02Y02C20/40Y02E50/10
Inventor 单保庆张超
Owner 北京中科乾和环保科技服务有限公司
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