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Microwave-enhanced biomass carbonization treatment method

A technology of biomass charcoal and treatment method, which is applied in the direction of biofuel, special carbonization, petroleum industry, etc. It can solve the problems of complicated operation and low acid concentration, and achieve carbonization treatment with reduced reaction steps, large specific surface area and low cost Effect

Active Publication Date: 2020-08-04
INST OF PROCESS ENG CHINESE ACAD OF SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the current sulfuric acid carbonizes biomass, the residual sulfuric acid is adsorbed by the carbon material, and it is necessary to wash the sulfuric acid out of the carbon material by adding dilute acid or water. The acid concentration after adding water becomes lower, and the operation is complicated.

Method used

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Embodiment 1

[0050] The invention provides a treatment method for microwave-enhanced biomass carbonization, said method comprising the following steps:

[0051] The method comprises the steps of:

[0052] (1) Mix biomass (rice husk), acid and catalyst to obtain a mixture; wherein, the particle size of the biomass is ≤100mm; the mixing is the first mixing of the biomass and the acid, followed by the second mixing with the catalyst Two mixing; the temperature of the first mixing is 85°C; the time of the first mixing is 1h; the temperature of the second mixing is 140°C; the time of the second mixing is 2h; the acid is alkane Alkylation waste sulfuric acid, the mass concentration of the alkylation waste sulfuric acid is 89.2%; the mass ratio of the acid and the biomass is 5:1; the catalyst is 1-butylsulfonic acid-3-methylimidazole sulfuric acid Hydrogen salt ionic liquid; the addition of the catalyst is 0.3% of the acid mass;

[0053] (2) The mixture obtained in step (1) is subjected to micr...

Embodiment 2

[0056] The invention provides a treatment method for microwave-enhanced biomass carbonization, said method comprising the following steps:

[0057] (1) Mix biomass (rice husk), acid and catalyst to obtain a mixture; wherein, the particle size of the biomass is ≤100mm; the mixing is the first mixing of the biomass and the acid, followed by the second mixing with the catalyst Two mixing; the temperature of the first mixing is 65°C; the time of the first mixing is 3h; the temperature of the second mixing is 100°C; the time of the second mixing is 3h; the acid is alkane Alkylation waste sulfuric acid, the mass concentration of the alkylation waste sulfuric acid is 89.2%; the mass ratio of the acid and the biomass is 4:1; the catalyst is 1-butylsulfonic acid-3-methylimidazole sulfuric acid Hydrogen salt; the addition of the catalyst is 1% of the acid mass;

[0058] (2) The mixture obtained in step (1) is subjected to microwave treatment to obtain a carbon material; wherein, the po...

Embodiment 3

[0061] The invention provides a treatment method for microwave-enhanced biomass carbonization, said method comprising the following steps:

[0062] (1) Mix biomass (reed), acid and catalyst to obtain a mixture; wherein, the particle size of the biomass is less than or equal to 100mm; the mixing is the first mixing of the biomass and the acid, followed by the second mixing with the catalyst Mixing; the temperature of the first mixing is 90°C; the time of the first mixing is 3h; the temperature of the second mixing is 95°C; the time of the second mixing is 3h; the acid is an alkyl The mass concentration of the waste sulfuric acid of the alkylation is 89.2%; the mass ratio of the acid and the biomass is 6.7:1; the catalyst is N-sulfonic acid butylpyridine bisulfate; the catalyst The addition amount is 0.5% of acid mass;

[0063] (2) The mixture obtained in step (1) is subjected to microwave treatment to obtain a carbon material; wherein, the power of the microwave treatment is 3...

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Abstract

The invention relates to a microwave-enhanced biomass carbonization treatment method which comprises the following steps: (1) mixing biomass, an acid and a catalyst to obtain a mixture; and (2) carrying out microwave treatment on the mixture obtained in the step (1) to obtain the carbon material. According to the method, the reaction process of the biomass and sulfuric acid is enhanced by utilizing microwaves, meanwhile, rapid separation of biomass charcoal and the sulfuric acid is realized, the reaction steps are reduced, the energy consumption is reduced, and low-cost carbonization treatmentof the biomass is realized. The biomass charcoal obtained by the reaction has the advantages of rich raw material sources, low price, large specific surface area, developed pore structure, good thermal stability and chemical stability and the like.

Description

technical field [0001] The invention relates to the field of biomass treatment, in particular to a treatment method for microwave-enhanced biomass carbonization. Background technique [0002] Biochar is also known as biochar, biochar, biocoke, etc. As a soil amendment, biomass forms a tenacious carbon-negative soil carbon complex and stores atmospheric carbon dioxide into soil carbon pools. After biochar is applied to the soil, its nutrient persistence is enhanced, which not only reduces the need for fertilizers for crops, but also reduces greenhouse gas emissions through biochar sequestration. [0003] The sources of raw materials for biochar are very extensive. According to literature reports, many agricultural and forestry by-products, such as jujube stones, walnut shells, walnut shells, waste tea leaves, corncobs, coconut shells, beetroot, peanut shells, rice husks, cotton shells, bananas, etc. Peel, bamboo waste, olive pits, cherry pits, orange peels, coffee pods, cor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/02C10B57/00C10B57/06
CPCC10B53/02C10B57/00C10B57/06Y02E50/10
Inventor 周志茂吕天宝高强刘瑞霞晏冬霞李世飞张锁江
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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