Straw charcoal

Description

Introduction of Straw charcoal

Straw biochar is a kind of biochar material made from crop residues (such as straw).It converts straw into solid carbon material through high-temperature pyrolysis or incineration.

This material has a rich porous structure and up to 60% carbon content, which makes it have a wide range of applications in soil improvement, energy substitution and carbon sink materials.
The production process of straw biochar includes crushing the straw and sending it to a high-temperature pyrolysis reactor, then pyrolysis in an inert atmosphere, and finally cooling to obtain biochar.Straw biochar has the advantages of converting crop residues into biochar, improving soil structure and soil fertility, providing sustainable energy as an energy substitute, and fixing carbon dioxide as a carbon sink material.

Parameter

Raw material:

Agricultural waste such as wheat straw, corn straw

Yield:

Approximately 20-50% based on the dry weight of the raw material (depending on the pyrolysis temperature)

Fixed carbon content:

50-80%

Ash content:

< 20%

Volatile content:

5-30%

Specific surface area (BET method):

50-300 m²/g (Biochar prepared at high temperatures usually has a higher specific surface area)

pH value (aqueous solution):

Usually alkaline, pH 8-11 (beneficial for soil improvement)

Carbon (C):

50-80%

Hydrogen (H):

2-6%

Oxygen (O):

10-30%

Nitrogen (N):

1-5%

Sulfur (S):

< 1%

Heavy metal content:

Below the limit of international or domestic agricultural and environmental standards

Cation exchange capacity (CEC):

5-30 cmol/kg (helps retain soil nutrients)

Features

Characteristics of Straw charcoal

It is produced by biomass raw materials such as straw through high temperature pyrolysis.

It is porous and has high specific surface area.

It can absorb soil nutrients and microorganisms.

Improve soil fertility, increase soil water retention and fertility retention.

It has the function of maintaining soil ecology.

It has good adsorption properties.

Good corrosion resistance.

Can be used as an organic fertilizer.

Absorb various nutrients and slowly release them to supply crops.

Prolong fertilizer efficiency and reduce fertilizer waste.

Video

Straw charcoal Processing video

Production technology

Characteristics of Straw charcoal

Application

Application Industry of Straw charcoal

Agricultural field Industrial field Environmental protection Life field

Agricultural field

1.Improve soil structure：The porosity and high surface area of biochar enable it to absorb and stabilize organic matter and minerals in the soil, thereby improving the soil’s structure and texture, enhancing the soil's ability to retain water and fertilizer, and helping to improve the yield and quality of crops.

2.Increasing of soil fertility: Biochar contains rich carbon elements and minerals, which can be used as fertilizer to provide nutrients and promote the growth and development of crops. At the same time, the stability of biochar enables it to continuously release nutrients and extend the fertilizer effect time.

3.Feed additives：The organic matter and minerals in biochar are beneficial for the digestion and growth of animals and can be added to animal feed as feed additives. This helps increase the growth rate and disease resistance of the animals.

Industrial field

Biochar can be used as a feedstock to produce biomass pellet fuel, which can replace fossil fuels such as coal for power generation and heat supply.

Biochar can also be used as a feedstock to produce biomass gas fuels, such as biogas, which can be used for home heating and car’s fuel.

Biochar is rich in carbon and other minerals, it can be used as a carburizing agent for the processing of iron and steel products to improve its hardness and wear resistance.

Environmental protection

Biochar can be used to repair soils contaminated by heavy metals, reduce the mobility and bioavailability of heavy metals, and reduce the harm to plants and the environment.

Biochar can also be used as an adsorbent in sewage treatment, absorbing pollutants such as suspended matter, organic matter and heavy metals, and enhancing the effect of biological treatment of sewage.

Life field

Biochar can be used as charcoal for barbecue, cooking and heating, and has the advantages of environmental protection and sustainability. Biochar can also be used as biochar adsorbent to absorb harmful substances in the air, such as formaldehyde, benzene, etc., to improve indoor air quality.

Application of Straw biochar

Straw biochar