Nitrogen-doped formed biochar as well as preparation method and application thereof

A technology of nitrogen doping and biochar, applied in the direction of separation methods, chemical instruments and methods, carbon compounds, etc., can solve the problems of lack of high-value utilization methods, difficulty in utilization, and high environmental risks, and achieve low cost, mechanical High-strength, wide-ranging effects

Pending Publication Date: 2021-07-16
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to provide a high-value environmental functional material nitrogen-doped biochar and its preparation method using biomass pyrolysis residues to solve the problem of low utilization value and difficulty in the use of residues after biomass preparation of gas or fuel oil Large size, high processing cost, high environmental risk, lack of high-value utilization methods, etc.

Method used

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  • Nitrogen-doped formed biochar as well as preparation method and application thereof
  • Nitrogen-doped formed biochar as well as preparation method and application thereof
  • Nitrogen-doped formed biochar as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] First, mix the gasification residue of brewing waste and urea at a ratio of 100:10 by weight for more than 20 minutes until uniform, then add 40 parts by weight of coal tar, and fully mix at room temperature until there is no powdery muddy aggregate, and the rest of the steps are the same as in the comparative example 1.

Embodiment 2

[0055] First, mix the sieved brewery waste gasification residue and urea at a ratio of 100:50 by weight for more than 20 minutes until uniform, then add 40 parts by weight of coal tar, and fully mix at room temperature until there is no powdery muddy aggregate, and the rest of the steps Same as Comparative Example 1.

Embodiment 3

[0057] First, mix the liquefied residue of brewing waste and melamine in the proportion of 100:10 by weight for more than 20 minutes until uniform, then add 40 parts by weight of coal tar, and fully mix at room temperature until there is no powdery mud-like agglomerate, and the rest of the steps are the same Scale 1.

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Abstract

The invention belongs to the field of biochar preparation, and particularly relates to a method for preparing biochar from waste biomass pyrolysis residues and the obtained formed biochar. To overcome a technical problem, the invention provides the method for preparing the nitrogen-doped formed biochar from the waste biomass pyrolysis residues. The method comprises the following steps: uniformly mixing the biomass pyrolysis residues and a nitrogen source, then adding a binder, conducting uniform mixing, carrying out extrusion molding, performing drying, and then carrying out oxidation, carbonization and activation to obtain the nitrogen-doped formed biochar. The method is simple in process and low in cost, and the obtained biochar has a good catalytic oxidation or/and adsorption effect on acid gas.

Description

technical field [0001] The invention belongs to the field of biochar preparation, and in particular relates to a method for preparing high-value biochar by using waste biomass pyrolysis residue, and the obtained biochar and its application. Background technique [0002] In recent years, with the accelerated transformation of my country's energy structure and the continuous tightening of environmental policies and regulations, the exploitation and use of traditional energy sources such as coal and oil have shown a gradual downward trend. People pay more and more attention to the development and utilization of renewable energy. Among them, the resource utilization of biomass bears the brunt. Biomass is derived from the sun and is one of the important renewable resources with a huge amount. According to statistics, the biomass produced by photosynthesis in the world is as high as 170 billion tons per year, and the total amount of waste biomass in my country alone has reached ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/324B01D53/02B01D53/86B01D53/48B01D53/50B01D53/52B01D53/62B01J20/20B01J21/18
CPCB01J20/20B01J21/18C01B32/324B01D53/02B01D53/8609B01D53/8612B01D53/8615B01D53/8618B01D53/8603B01D53/8671B01D53/8681B01J2220/4875B01J2220/4887
Inventor 江霞周通晓陈琳蒋文举马生贵王邦达陈文华邓波丁海龙
Owner SICHUAN UNIV
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