What are the steps of coconut shell carbonization?
Coconut shell carbonization first requires the collection, screening and drying of raw materials. If the material is too large, it must be crushed. The crushed coconut shells are put into the carbonization furnace for preheating, and then on the basis of preheating, The temperature is further increased to 600-800 degrees Celsius, so that the organic matter in the coconut shell undergoes a pyrolysis reaction to generate carbides. This stage requires strict control of temperature and time to obtain a good carbonization effect.
The specific carbonization process of coconut shell can be subpided into the following stages:
1. Water analysis stage: In the temperature range of 50~150℃, free water, physically adsorbed water, etc. in the coconut shell gradually precipitate, accompanied by a certain weight loss.
2. Holding stage: In the temperature range of 80 to 240°C, the molecularly bound water of cellulose and lignin in the coconut shell escapes, and the TGA curve is relatively gentle at this time.
3. Pyrolysis stage: In the temperature range of 240~400°C, the cellulose and lignin in the coconut shell undergo thermal decomposition reactions, releasing CO2, CO and other gases, resulting in significant weight loss of the coconut shell.
4. Slow weight loss stage: When the temperature exceeds 400°C, aromatic polycyclic compounds begin to form. This stage is also called the calcination stage of the carbonization process.
After carbonization, coconut shell charcoal needs further processing, such as crushing, screening, etc., to adjust its particle size distribution to meet different usage requirements.
In general, the process of coconut shell carbonization is a complex and delicate process that requires strict control of the conditions and parameters of each step to obtain high-quality coconut shell charcoal products.
