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Preparation method of biochar

A biochar and filtrate technology, applied in the field of biomass resource utilization, can solve the problems of limited adsorption performance and stability, few surface functional groups, and limited adsorption sites on the surface of biochar, and achieve rich pore structure and stability strong effect

Inactive Publication Date: 2019-11-08
JILIN JIANZHU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to prepare biochar by mixing different biomass, and overcomes the inability to fuse biochar from different sources of raw materials, and the fact that the surface adsorption sites of biochar itself are very limited in the prior art, and the surface functional groups are few, and the adsorption performance and stability are limited. very restrictive

Method used

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  • Preparation method of biochar
  • Preparation method of biochar
  • Preparation method of biochar

Examples

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Effect test

Embodiment 1

[0031] (1) Mix the fallen leaves and branches of trees produced in the process of greening waste urban landscaping and suburban forestry tending, fruit tree pruning, dry, and crush to 100 mesh, then put it into a container, and add a mass fraction of 30% Hydrochloric acid solution, the addition is 2wt% of the greening garbage particles, soak the greening garbage particles, stir, the stirring speed is 200r / min, and the stirring time is 30min, the greening garbage particles soaked in hydrochloric acid are put into the microwave reactor, and the greening garbage particles are heated at 300W / min m 2 React under the power of 15min, after the reaction is over, take out the reactant and set aside;

[0032] (2) Filter the above reactant under reduced pressure, collect the filtrate in a container, add amylase to the filtrate, the mass ratio of the filtrate to amylase is 60:1, add deionized water with 3 times the mass of the filtrate , add hydrochloric acid solution, adjust the pH to 8...

Embodiment 2

[0036] (1) Mix the fallen leaves, tree branches, fallen leaves and dead branches in the process of urban greening and landscaping, suburban forestry tending, fruit tree pruning, drying, and crushing to 100 meshes, then put them into a container, add The mass concentration is 30% hydrochloric acid solution, the addition amount is 2wt% of the green garbage particles, soak the green garbage particles, stir, the stirring speed is 250r / min, and the stirring time is 30min, put the green garbage particles soaked in hydrochloric acid into the microwave reaction In kettle, at 300W / m 2Under the power of the reaction for 20min, after the reaction, take out the reactant and set aside;

[0037] (2) Filter the above reactant under reduced pressure, collect the filtrate in a container, add amylase to the filtrate, the mass ratio of the filtrate to amylase is 60:1, add deionized water with 3 times the mass of the filtrate , add hydrochloric acid solution, adjust the pH to 8, add fresh chicke...

Embodiment 3

[0041] (1) Mix the fallen leaves, tree branches, fallen leaves and dead branches in the process of urban greening and landscaping, suburban forestry tending, fruit tree pruning, drying, and crushing to 110 mesh, then put it into a container, add The hydrochloric acid solution with a mass fraction of 30% is added in an amount of 2wt% of the greening garbage particles, soaked in the greening garbage particles, and stirred at a stirring rate of 200r / min for 30min, and the greening garbage particles soaked in hydrochloric acid are put into the microwave reaction In kettle, at 300W / m 2 Under the power of the reaction for 20min, after the reaction, take out the reactant and set aside;

[0042] (2) Filter the above reactant under reduced pressure, collect the filtrate in a container, add amylase to the filtrate, the mass ratio of the filtrate to amylase is 60:1, add deionized water with 3 times the mass of the filtrate , add hydrochloric acid solution, adjust the pH to 9, add fresh ...

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Abstract

The invention discloses a preparation method of biochar. The preparation method includes the steps that greening garbage is dried and crushed, then the greening garbage is put into a container, a hydrochloric acid solution is added, soaking and stirring are conducted, filtration under reduced pressure is conducted in a microwave reaction kettle, amylase, deionized water, the hydrochloric acid solution and animal dung are added to be evenly stirred, inert gas is introduced into the container, the container is sealed and heated, after the reaction is completed, a product is collected and filtered, filter is dried, bentonite is added into the filter, the filter is added into a reaction container, the inert gas is introduced into the reaction container, the container is sealed, and the reaction container is baked; and a baked product is taken out and placed in a crucible and placed in a muffle furnace to be carbonized, and the biochar is obtained. The biochar is wide in raw material source, low in cost, easy to obtain, abundant in pore structure and higher in stability, the pore structure of the biochar is relatively dense, and various metal ions can be adsorbed.

Description

technical field [0001] The invention belongs to the field of resource utilization of biomass, and in particular relates to a preparation method of biochar. Background technique [0002] Biochar is the carbon-rich solid by-product remaining after the pyrolysis of biomass in anaerobic or low-oxygen conditions. In recent years, due to the significant environmental and social benefits of biochar, it has aroused widespread interest and great attention worldwide. Because of its high carbon content, well-developed pore structure, good corrosion resistance, it can retain water, nutrients, and adsorb pollutants such as organic matter and heavy metals. It is an ideal soil conditioner and adsorbent. The application of biochar can bring four environmental benefits: slow down the greenhouse effect, improve the soil, increase the yield of crops, and reduce environmental pollution. After biochar is pyrolyzed, most of its components are carbon, which is stable in nature and not easy to de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05B01J20/20B01J20/28B01J20/30
CPCC01B32/05B01J20/20B01J20/28061B01J20/28064B01J2220/4887B01J2220/4825
Inventor 陆海王建辉李科高铎瑄杨天浩冯伟豪
Owner JILIN JIANZHU UNIVERSITY
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